WO2015159510A1 - Automatic fire alarm system and base device for automatic fire alarm system - Google Patents

Automatic fire alarm system and base device for automatic fire alarm system Download PDF

Info

Publication number
WO2015159510A1
WO2015159510A1 PCT/JP2015/001973 JP2015001973W WO2015159510A1 WO 2015159510 A1 WO2015159510 A1 WO 2015159510A1 JP 2015001973 W JP2015001973 W JP 2015001973W WO 2015159510 A1 WO2015159510 A1 WO 2015159510A1
Authority
WO
WIPO (PCT)
Prior art keywords
pair
electric wires
unit
wires
voltage
Prior art date
Application number
PCT/JP2015/001973
Other languages
French (fr)
Japanese (ja)
Inventor
松本　正
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to EP15780162.2A priority Critical patent/EP3133568B1/en
Publication of WO2015159510A1 publication Critical patent/WO2015159510A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop

Definitions

  • the present invention generally relates to an automatic fire notification system, and more particularly to an automatic fire notification system in which a parent device and a child device are electrically connected via a pair of electric wires.
  • the automatic fire alarm system detects the occurrence of a fire with a slave unit consisting of a heat detector, smoke detector, flame detector, etc., and sends it to a master unit consisting of a receiver. It is configured to notify the fire occurrence from the slave unit.
  • the P-type automatic fire alarm system notifies the base unit consisting of receivers of the occurrence of a fire when the slave unit electrically short-circuits the pair of wires.
  • a slave unit notifies the master unit of the occurrence of a fire through communication using a transmission signal transmitted through a transmission line.
  • an R-type automatic fire alarm system is used for large-scale buildings, and a P-type automatic fire alarm system is often used for buildings of medium-sized or smaller because of ease of construction.
  • Patent Document 1 discloses a P-type automatic fire alarm system in which a plurality of fire detectors as slave units are connected to a plurality of sensor lines derived from a fire receiver as a master unit. Has been.
  • the slave unit detects an abnormality detection signal having the same signal format as the fire signal to be output to the master unit when a failure is detected in the slave unit itself. It is configured to output for a predetermined time different from the output time.
  • the master unit distinguishes from the input of the fire signal due to the difference in the input time of this signal, and performs a predetermined alarm operation.
  • the master unit can only distinguish the fire signal from the slave unit and the abnormality detection signal, and by communication using a transmission signal as in the R-type system.
  • Various data cannot be transmitted from the slave unit to the master unit.
  • the automatic fire alarm system described in Patent Document 1 cannot add functions installed in the R-type system, such as identification of a slave unit that issues a report or automatic test.
  • the present invention has been made in view of the above-mentioned reasons, and an object thereof is to provide an automatic fire alarm system capable of adding an R-type function while being a P-type with a simple configuration as much as possible.
  • the automatic fire alarm system of the present invention includes a master unit having an application unit that applies a voltage between a pair of electric wires, a state of being electrically connected to the pair of electric wires, and short-circuiting the pair of electric wires.
  • Current generated on the pair of electric wires by changing the current flowing from the pair of electric wires and electrically connected to the pair of electric wires and at least one first slave unit that switches between a state in which no short circuit occurs
  • At least one second slave unit that transmits a downstream current signal composed of a signal, and the master unit is provided between the application unit and at least one of the pair of electric wires,
  • a resistor that limits the current that flows through the pair of wires when the machine short-circuits between the pair of wires, and the downstream current signal is converted into a voltage change on the pair of wires by a voltage drop across the resistor.
  • the base unit of the automatic fire notification system of the present invention is a base unit of the automatic fire notification system, and the automatic fire notification system is electrically connected to a pair of electric wires and short-circuits between the pair of electric wires.
  • At least one first slave unit that switches between a state and a state that is not short-circuited, and the pair of wires are electrically connected to each other, and the current flowing from the pair of wires is changed on the pair of wires.
  • At least one second slave unit that transmits a downstream current signal composed of a generated current signal
  • the master unit including an application unit that applies a voltage between the pair of electric wires, the application unit, and the pair of pair units
  • a resistor that is provided between at least one of the electric wires and that restricts a current flowing through the pair of electric wires when the first slave unit short-circuits between the pair of electric wires; Due to voltage drop
  • a receiver for receiving a downstream voltage signal whose serial made by converting the change in voltage on a pair of wires.
  • the present invention includes at least one second slave unit that transmits a downstream current signal by changing the current flowing from the pair of electric wires, various data can be transmitted from the second slave unit to the master unit.
  • the automatic fire alarm system according to the present invention is configured such that when the first slave unit short-circuits between the pair of wires, a resistance for limiting the current flowing in the pair of wires is transmitted from the second slave unit. It is also used to convert the signal to a voltage signal. Therefore, there is an advantage that an R-type function can be added even though it is a P-type with a simple configuration as much as possible.
  • Drawing 1 is an explanatory view showing a schematic structure of an automatic fire information system concerning an embodiment.
  • FIG. 2 is an explanatory diagram showing the overall configuration of the automatic fire alarm system according to the embodiment.
  • Drawing 3 is an explanatory view of operation at the time of an automatic test of an automatic fire information system concerning an embodiment.
  • Drawing 4 is an explanatory view of operation at the time of the alarming of the automatic fire alarm system concerning an embodiment.
  • the automatic fire notification system 1 includes a parent device 2, at least one first child device 3, and at least one second child device 4. Yes.
  • the master unit 2 includes an application unit 21 that applies a voltage between the pair of electric wires 51 and 52.
  • the first handset 3 is electrically connected to the pair of electric wires 51 and 52, and switches between a state in which the pair of electric wires 51 and 52 are short-circuited and a state in which the pair is not short-circuited.
  • the second cordless handset 4 is electrically connected to the pair of electric wires 51 and 52, and includes a current signal generated on the pair of electric wires 51 and 52 by changing the current flowing from the pair of electric wires 51 and 52. A downstream current signal is transmitted.
  • the base unit 2 has a resistor 22 and a receiving unit 23.
  • the resistor 22 is provided between the applying unit 21 and at least one of the pair of electric wires 51 and 52, and is connected to the pair of electric wires 51 and 52 when the first handset 3 short-circuits between the pair of electric wires 51 and 52. Limit the flowing current.
  • the receiving unit 23 receives a down voltage signal obtained by converting the down current signal into a voltage change on the pair of electric wires 51 and 52 by a voltage drop at the resistor 22.
  • the automatic fire alarm system 1 is a system in which two types of child devices, the first child device 3 and the second child device 4, are mixed.
  • the first slave unit 3 is a type of slave unit that notifies the master unit 2 of the occurrence of a fire by electrically short-circuiting the pair of electric wires 51 and 52.
  • the second slave unit 4 is a type of slave unit that notifies the master unit 2 of the occurrence of a fire by communication using transmission signals transmitted through the pair of electric wires 51 and 52.
  • the first slave unit 3 and the second slave unit 4 share the resistance 22 of the master unit 2.
  • the automatic fire alarm system 1 includes the second resistor 22 for limiting the current flowing through the pair of electric wires 51 and 52 when the first handset 3 short-circuits between the pair of electric wires 51 and 52. This is also used for converting the current signal transmitted from the slave unit 4 into a voltage signal.
  • the automatic fire alarm system 1 is not limited to an apartment house, for example, a commercial facility, a hospital, a hotel, a miscellaneous building, etc. Applicable to various buildings.
  • first slave unit 3 When the plurality of first slave units 301, 302, 303,... are not particularly distinguished from each other, they are simply referred to as “first slave unit 3”, and the plurality of second slave units 401, 402, 403,. When each is not particularly distinguished, it is simply referred to as “second slave unit 4”.
  • a pair of electric wires 51 and 52 are wired for each of the first to fourth floors.
  • four sets of two sets of one set (two-wire type) of electric wires 51 and 52 are provided in the entire apartment house 6.
  • the first handset 3 and the second handset 4 are mixed even on the same floor, but the first handset 3 and the second handset 4 are on the same floor. It is not indispensable to mix. That is, for example, the first handset 3 and the second handset 4 for each floor, such as the first handset 3 on the first floor and the second handset 4 on the third floor and the fourth floor. May be separated. In this case, only the same type of child device (the first child device 3 or the second child device 4) is electrically connected to the pair of electric wires 51 and 52 of the same set. Even in this case, when viewed from the base unit 2, the first handset 3 and the second handset 4 are electrically connected via a pair of electric wires 51 and 52 (a plurality of sets). As the fire alarm system 1, two types of child devices, the first child device 3 and the second child device 4, are mixed.
  • a maximum of 30 slave units can be connected to each pair of electric wires 51 and 52.
  • these numerical values are examples, and are not intended to be limited to these numerical values.
  • the pair of electric wires 51 and 52 are electrically connected via the terminal resistor 7 at the terminal ends (ends opposite to the base unit 2). Therefore, the main
  • FIG. 1 the pair of electric wires 51 and 52 are electrically connected via the terminal resistor 7 at the terminal ends (ends opposite to the base unit 2). Therefore, the main
  • the second slave unit 4 when only the second slave unit 4 is connected to each pair of electric wires 51 and 52, a maximum of 40 to 80 slave units (second slave unit 4) can be connected. Therefore, for example, when a maximum of 40 second cordless handsets 4 can be connected to each pair of wires 51, 52 and a maximum of 50 pairs of wires 51, 52 can be connected to one master phone 2.
  • these numerical values are examples, and are not intended to be limited to these numerical values. In this case, the terminating resistor 7 is omitted.
  • the automatic fire alarm system 1 basically detects the occurrence of a fire with a slave unit (first slave unit 3, second slave unit 4) comprising a heat detector, smoke detector, flame detector, etc. And it is comprised so that notification of a fire outbreak may be given from the subunit
  • the handset (the first handset 3 and the second handset 4) is not limited to a sensor that detects the occurrence of a fire, and may include a transmitter.
  • the transmitter is a device that has a push button switch (not shown) and notifies the parent device 2 of the occurrence of a fire by manually operating the push button switch when a person detects a fire.
  • P-type Proprietary-type
  • R-type Record-type
  • the slave unit In the P-type automatic fire alarm system, the slave unit notifies the master unit of the occurrence of fire by electrically short-circuiting the pair of electric wires.
  • a slave unit In the R-type automatic fire system, a slave unit notifies the master unit of the occurrence of a fire through communication using a transmission signal transmitted through a transmission line.
  • the automatic fire alarm system 1 of this embodiment is based on the P type. More specifically, in this embodiment, the existing wiring (electric wires 51 and 52) is used as it is in the apartment house where the P-type automatic fire alarm system was installed, and the receiver (master 2) and child A case is assumed in which the machines (the first handset 3 and the second handset 4) are replaced. Here, some slave units may use existing slave units as they are. Note that the automatic fire notification system 1 of the present embodiment can also be employed as a newly introduced automatic fire notification system.
  • the automatic fire alarm system 1 of the present embodiment is partially P-type, but by using the second slave unit 4 capable of communication using a transmission signal, the same function as that of the R-type is used in part. It has been added. Specifically, the automatic fire alarm system 1 transmits a pair of electric wires 51 in the master unit 2 by transmitting an identifier (address) assigned in advance by the second slave unit 4 to the master unit 2 at the time of reporting. , 52 can be specified in units of slave units (second slave units 4), not in units of sets. In addition, the automatic fire alarm system 1 communicates between the master unit 2 and the second slave unit 4 during non-reporting (normal time) so that the communication status between the master unit 2 and the second slave unit 4 is communicated. In addition, an automatic test can be performed on the operation of the second handset 4 or the like.
  • the automatic fire alarm system 1 can exchange various information between the master unit 2 and the second slave unit 4 by using communication, it is possible to specify the notification source for each slave unit as described above. Not only the automatic test but also various functions can be added.
  • the flow of the transmission signal from the second child device 4 to the parent device 2 is referred to as “downward”.
  • the flow of the transmission signal to 4 is called “upstream”.
  • the parent device 2 is a P-type receiver that receives a notification of the occurrence of a fire from the child devices (the first child device 3 and the second child device 4).
  • Base unit 2 is installed in a management room of a building (apartment house 6).
  • the master unit 2 includes a transmission unit 24 that transmits a transmission signal to the second slave unit 4 in addition to the application unit 21, the resistor 22, and the reception unit 23, and a display unit 25 that performs various displays. And an operation unit 26 that receives an operation input from the user, and a control unit 27 that controls each unit.
  • the master unit 2 displays the location of the fire occurrence on the display unit 25.
  • the control unit 27 has a microcomputer as a main component, and realizes a desired function by executing a program stored in a memory (not shown).
  • the program may be written in the memory in advance, or may be provided by being stored in a storage medium such as a memory card.
  • the master unit 2 also has an interlocking function with other equipment such as smoke prevention equipment (not shown) and emergency broadcasting equipment (not shown). Thereby, the main
  • an external party Upon receiving a notification of the occurrence of a fire from the slave device, an external party, a fire engine, It is configured to notify the security company.
  • the base unit 2 applies a voltage between the pair of electric wires 51 and 52 from the applying unit 21, thereby connecting the sub unit (the first sub unit 3 and the first sub unit 3). 2 functioning as a power source for the operation of the entire automatic fire alarm system 1.
  • the voltage applied by the application unit 21 between the pair of electric wires 51 and 52 is 24 V DC, but the present invention is not limited to this value.
  • the master unit 2 is provided with a standby power source 28 using a storage battery so that a power source for operation of the automatic fire alarm system 1 can be secured even in the event of a power failure.
  • Base unit 2 uses a commercial power source, a private power generation facility, etc. (not shown) as a main power source.
  • the application unit 21 automatically switches the power supply source from the main power source to the standby power source 28 when the main power source is interrupted, and automatically switches from the standby power source 28 to the main power source when the main power source is restored.
  • the standby power supply 28 has a capacity and other specifications determined so as to satisfy the standards defined by the ministerial ordinance.
  • the resistor 22 is provided between the applying unit 21 and at least one of the pair of electric wires 51 and 52 as described above.
  • the resistor 22 is inserted between one (high potential side) of the pair of electric wires 51, 52 and the application unit 21.
  • the resistor 22 may be inserted between the other (low potential side) electric wire 52 and the application unit 21, or both the pair of electric wires 51 and 52 and the application unit 21. Between them.
  • the resistor 22 is not limited to a single resistor but may be a resistor group in which a plurality of resistors are connected in series or in parallel.
  • the resistor 22 has a first function for limiting a current flowing through the pair of electric wires 51 and 52 when the first sub unit 3 short-circuits between the pair of electric wires 51 and 52, and a second sub unit. It has two functions, a second function for converting a current signal transmitted from the machine 4 into a voltage signal.
  • the resistor 22 has a first function as a current limiting element and a second function as a current-voltage conversion element.
  • the resistance value of the resistor 22 is 400 ⁇ or 600 ⁇ , but the value is not limited to this value.
  • the receiving unit 23 and the transmitting unit 24 are electrically connected between the resistor 22 and the pair of electric wires 51 and 52.
  • the receiving unit 23 is not limited to the configuration connected between the resistor 22 and the pair of electric wires 51 and 52, and may be electrically connected between the applying unit 21 and the resistor 22, for example. Since the receiving unit 23 receives the transmission signal from the second slave unit 4 and the transmission unit 24 transmits the transmission signal to the second slave unit 4, the master unit 2 is connected to the second slave unit 4. Communication is possible in both directions.
  • the receiving unit 23 receives a transmission signal from the second slave unit 4 as a voltage signal (voltage change) on the pair of electric wires 51 and 52. That is, the downstream current signal sent (generated) on the pair of electric wires 51 and 52 by the second slave unit 4 is converted into the downstream voltage signal by the voltage drop at the resistor 22, so that the receiving unit 23 The downstream voltage signal is received as a transmission signal from the second slave unit 4.
  • the receiving unit 23 converts the voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the second child device 4 changes the current flowing from the pair of electric wires 51 and 52 into the down voltage signal. Will receive as.
  • the transmission unit 24 transmits a current signal generated on the pair of electric wires 51, 52 by changing the current flowing from the pair of electric wires 51, 52 to the second slave unit 4 as a transmission signal.
  • the upstream current signal sent (generated) on the pair of electric wires 51 and 52 by the transmission unit 24 is converted into an upstream voltage signal by a voltage drop at the resistor 22, and the second slave unit 4 transmits from the master unit 2.
  • An upstream voltage signal is received as a signal.
  • a voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the transmission unit 24 changes the current flowing from the pair of electric wires 51 and 52 is transmitted to the second slave unit 4 as an up voltage signal. Will be received.
  • the pair of electric wires 51 and 52 are short-circuited by the first slave unit 3 (hereinafter referred to as “short-circuit state”) and not short-circuited (hereinafter “non-short-circuit”).
  • the identification part 29 monitors the magnitude
  • the first handset 3 includes a (first) diode bridge 31, a (first) power supply circuit 32, a (first) sensor 33, a thyristor 34, and a drive circuit 35. .
  • the diode bridge 31 has a pair of electric wires 51 and 52 electrically connected to the input end side, and a power supply circuit 32 and a thyristor 34 electrically connected to the output end side.
  • the power supply circuit 32 generates power for operating the first handset 3 from the power on the pair of electric wires 51 and 52.
  • the sensor 33 detects the occurrence of a fire.
  • the drive circuit 35 switches from the non-short-circuit state to the short-circuit state by turning on the thyristor 34 according to the output of the sensor 33.
  • the first handset 3 when the first handset 3 detects the occurrence of a fire, the first handset 3 turns on the thyristor 34 to establish a short-circuit state in which the pair of electric wires 51 and 52 are electrically short-circuited. Notify the occurrence of fire.
  • the second handset 4 includes a (second) diode bridge 41, a (second) power supply circuit 42, a (second) sensor 43, a transmission circuit 44, a reception circuit 45, and a control circuit 46. And a storage unit 47.
  • a pair of electric wires 51, 52 are electrically connected to the input end side, and a power supply circuit 42, a transmission circuit 44, and a reception circuit 45 are electrically connected to the output end side.
  • the power supply circuit 42 generates power for operation of the second slave unit 4 from the power on the pair of electric wires 51 and 52.
  • the sensor 43 detects the occurrence of a fire.
  • the control circuit 46 controls the transmission circuit 44 and the reception circuit 45 to transmit a transmission signal from the transmission circuit 44 to the parent device 2 according to the output of the sensor 43, or to receive the transmission signal from the parent device 2 as the reception circuit 45. Or receive.
  • the transmission circuit 44 transmits a current signal generated on the pair of electric wires 51, 52 by changing the current flowing from the pair of electric wires 51, 52 to the parent device 2 as a transmission signal.
  • the downstream current signal sent (generated) on the pair of electric wires 51 and 52 by the transmission circuit 44 is converted into a downstream voltage signal by a voltage drop at the resistor 22, and the parent device 2 transmits from the second slave device 4.
  • a downstream voltage signal is received as a signal.
  • a voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the transmission circuit 44 changes the current flowing from the pair of electric wires 51 and 52 is received by the parent device 2 as a down voltage signal. Will be.
  • the receiving circuit 45 receives a transmission signal from the master unit 2 as a voltage signal (voltage change) on the pair of electric wires 51 and 52. That is, the upstream current signal sent (generated) on the pair of electric wires 51 and 52 by the parent device 2 is converted into an upstream voltage signal by the voltage drop at the resistor 22, so that the receiving circuit 45 is connected from the parent device 2. As a transmission signal, an upstream voltage signal is received. In other words, the receiving circuit 45 receives a voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the parent device 2 changes the current flowing from the pair of electric wires 51 and 52 as an up voltage signal. It will be.
  • the storage unit 47 stores at least an identifier (address) assigned in advance to the second slave unit 4. That is, a unique identifier is assigned to each of the plurality of second slave units 401, 402, 403. Each identifier is registered in the parent device 2 in association with each installation location (for example, a room number) of the plurality of second child devices 401, 402, 403.
  • the second slave unit 4 when the second slave unit 4 detects the occurrence of a fire, the second slave unit 4 includes at least an identifier stored in the storage unit 47 by communication using a transmission signal transmitted through the pair of electric wires 51 and 52. Is sent to the master unit 2 to notify the master unit 2 of the occurrence of a fire. At this time, when receiving the notification of the occurrence of the fire from the second slave unit 4, the master unit 2 may identify the second slave unit 4 that is the reporting source from the identifier included in the received data. it can.
  • the slave units (first slave unit 3 and second slave unit 4) operate with power supplied from the standby power supply 28 of the master unit 2. Since a large number of slave units may be connected to a single master unit 2, in order for the automatic fire alarm system 1 to operate for a specified time or longer with power supplied from the standby power supply 28, It is necessary to keep the power consumption per unit relatively small for the first slave unit 3 and the second slave unit 4).
  • the operation of the automatic fire alarm system 1 during the automatic test will be described with reference to FIG.
  • the voltage waveform in a pair of electric wires 51 and 52 is represented with the horizontal axis as the time axis and the vertical axis as the voltage value.
  • the base unit 2 When performing the automatic test, the base unit 2 switches the operation mode from the normal mode to the automatic test mode. When the base unit 2 enters the automatic test mode, the base unit 2 repeatedly transmits a time-division test signal to the pair of electric wires 51 and 52.
  • the test signal consists of a voltage waveform in a format divided into a plurality of sections in the time axis direction for each frame. That is, the test signal is a time-division signal composed of three sections (periods) of the synchronization band 101, the transmission band 102, and the reply band 103. In FIG. 3, only one frame of the test signal is shown.
  • the master unit 2 periodically generates a synchronization signal in the synchronization band 101 by periodically changing the voltage applied to the pair of electric wires 51 and 52 from the application unit 21. Furthermore, base unit 2 transmits request data from transmission unit 24 to second handset 4 in transmission band 102.
  • the reply band 103 is a period for the base unit 2 to receive return data from the second handset 4. Moreover, the reply band 103 is divided into a plurality of time slots T1, T2, T3... So as to be assigned to each of the plurality of second slave units 401, 402, 403. In the example of FIG. 3, it is assumed that the maximum number of the second handset 4 that can be connected to one set of electric wires 51 and 52 is 64, and the reply band 103 includes 64 time slots T1 to T64. It is divided.
  • the base unit 2 periodically outputs a synchronization signal, and transmits to the transmission band 102 and each of the plurality of second slave units 401, 402, 403... A plurality of assigned time slots T1 to T64 are set.
  • the base unit 2 transmits request data for instructing items of an automatic test to be performed from the transmission unit 24 to the second handset 4.
  • the items of the automatic test include, for example, survival confirmation (keep alive), self-diagnosis of the second slave unit 4, and the like.
  • the second slave unit 4 When the second slave unit 4 receives the synchronization signal, the second slave unit 4 switches the operation mode from the standby mode to the reception mode, and the request circuit 45 receives the request data from the master unit 2 in the transmission band 102. Thereafter, the second slave unit 4 transmits the return data from the transmission circuit 44 to the master unit 2 in the time slot allocated to itself among the plurality of time slots T1 to T64 in the reply band 103.
  • the return data includes at least the identifier of the second slave unit 4 that is the transmission source, and further includes test results such as normal and abnormal (or failure). Thereafter, the second slave unit 4 is synchronized every time a synchronization signal is received, and repeats reception of request data in the transmission band 102 and transmission of return data in the reply band 103.
  • the horizontal axis represents a time axis and the vertical axis represents a voltage value, and voltage waveforms in the pair of electric wires 51 and 52 are represented.
  • the master unit 2 operates in the normal mode
  • the second slave unit 4 operates in the standby mode.
  • the base unit 2 applies a constant voltage (for example, DC 24V) between the application unit 21 and the pair of electric wires 51 and 52.
  • the second handset 4 adjusts the amount of current drawn in the transmission circuit 44 to change the voltage between the pair of electric wires 51 and 52 from “V3” to “V2”, “V1” (V3>).
  • V2> V1) can be lowered step by step up to two steps.
  • the second slave unit 4 When detecting the occurrence of a fire, the second slave unit 4 draws a current in the transmission circuit 44, thereby reducing the voltage between the pair of electric wires 51 and 52 by one step from “V3” to “V2”. The occurrence is notified to the base unit 2. After the standby time elapses after the voltage is lowered to “V2”, the second slave unit 4 transmits its own identifier as notification data from the transmission circuit 44 to the master unit 2 (S1 in FIG. 4). At this time, the second handset 4 further draws a current in the transmission circuit 44 to further reduce the voltage between the pair of electric wires 51 and 52 by one step, and alternately switches between “V2” and “V1”. Send alert data. The standby time is set based on an identifier (address) unique to the second slave unit 4, and the collision (collision) of the notification data between the second slave units 4 having different identifiers can be avoided.
  • the second slave unit 4 After transmitting the notification data, the second slave unit 4 finishes drawing the current in the transmission circuit 44, and temporarily returns the voltage between the pair of electric wires 51 and 52 to “V3”. When the second slave unit 4 continues to detect the occurrence of a fire, the voltage between the pair of electric wires 51 and 52 is lowered again from “V3” to “V2” to notify the master unit 2 of the fire occurrence.
  • the alert data is transmitted after the standby time has elapsed (S2).
  • the second slave unit 4 is a sensor that generates interlocking data for interlocking with other equipment (interlocking sensor)
  • the second slave unit 4 is notified when the occurrence of a fire is detected.
  • Linked data is transmitted to base unit 2 instead of data (S3).
  • the interlocking data is data including the identifier of the second handset 4 as well as the notification data, and further including interlocking information necessary for interlocking other equipment.
  • the second slave unit 4 draws a current in the transmission circuit 44, thereby reducing the voltage between the pair of electric wires 51 and 52 from “V3” to “V2”.
  • the machine 2 is notified, and the interlocking data is transmitted after the standby time has elapsed.
  • the second slave unit 4 further draws current in the transmission circuit 44 and further reduces the voltage between the pair of electric wires 51 and 52 by one step, and alternately “V2” and “V1”. Link data is transmitted by switching.
  • the second slave unit 4 that is the interlocking sensor finishes drawing the current in the transmission circuit 44, and temporarily returns the voltage between the pair of electric wires 51 and 52 to “V3”.
  • the voltage between the pair of electric wires 51 and 52 is lowered from “V3” to “V2” again to detect the occurrence of the fire.
  • the device 2 is notified, and the interlocking data is transmitted after the standby time has elapsed (S4).
  • the second slave unit 4 draws current in two stages in the event of a fire, so that the voltage between the pair of electric wires 51 and 52 decreases from “V3” to “V2” instead of the synchronization signal. This can be used as a trigger to transmit alert data or interlocking data. In this case, the second slave unit 4 reduces the voltage between the pair of electric wires 51 and 52 from “V3” to “V2” and notifies the master unit 2 of the occurrence of a fire or Linked data can be sent.
  • the base unit 2 When the base unit 2 receives the alert data from the second slave unit 4 at the receiving unit 23, the base unit 2 specifies the second slave unit 4 that is the source of the alert based on the identifier included in the alert data.
  • the base unit 2 that has specified the reporting source displays the installation location (for example, the room number) of the second slave unit 4 that is the reporting source on the display unit 25, and not only the occurrence of fire but also the fire source. Notification in a form possible until
  • the master unit 2 when receiving the interlocking data from the second slave unit 4 at the receiving unit 23, transmits an interlocking signal to other equipment and performs interlocking with the other equipment in addition to the notification.
  • the timing at which the second slave unit 4 transmits the alarm data and the interlocking data is as follows.
  • the voltage between the pair of electric wires 51 and 52 is lowered from “V3” to “V2” to prevent the fire from occurring. It is not limited to notifying 2. That is, for example, the second slave unit 4 lowers the voltage between the pair of electric wires 51 and 52 from “V3” to “V2” to notify the master unit 2 of the occurrence of the fire, or after that,
  • the structure which transmits interlocking data may be sufficient.
  • the configuration in which the second slave unit 4 lowers the voltage between the pair of electric wires 51 and 52 in stages is not essential.
  • communication between the master unit 2 and the second slave unit 4 performed at the time of the automatic test or at the time of reporting is performed between the pair of electric wires 51 and 52 to which the second slave unit 4 is connected. It is premised on a non-short-circuit state that is not short-circuited by the first handset 3. In other words, in the short-circuit state in which the first handset 3 turns on the thyristor 34 to electrically short-circuit the pair of electric wires 51 and 52, the second handset connected to the pair of electric wires 51 and 52. Communication as described above is not performed between 4 and the parent device 2.
  • the notification of the fire occurrence to the parent device 2 is not the second child device 4 but the first child device 4 This is performed by the handset 3.
  • the automatic fire notification system 1 can identify the automatic test and the report source, for example, as described above. If automatic testing becomes possible, the labor of testing that is required to be performed regularly can be saved and labor costs can be reduced. In addition, if the source of the report can be specified, there is an advantage that fire extinguishing activities and evacuation guidance can be efficiently performed.
  • the automatic fire alarm system 1 of the present embodiment includes a resistor 22 for limiting the current flowing through the pair of electric wires 51 and 52 when the first handset 3 short-circuits between the pair of electric wires 51 and 52. This is also used to convert the current signal transmitted from the second slave unit 4 into a voltage signal. Therefore, it is not necessary to provide a current-voltage converter separately from the parent device 2 for the pair of electric wires 51 and 52, and the configuration of the automatic fire alarm system 1 in which the first child device 3 and the second child device 4 are mixed. Can be simplified. As a result, the automatic fire alarm system 1 according to the present embodiment has an advantage that it can add an R-type function while being P-type with a simple configuration as much as possible.
  • the parent device 2 has the transmission unit 24 and the second child device 4 has the reception circuit 45 as in the present embodiment.
  • the transmission unit 24 generates an upward current signal composed of a current signal on the pair of wires 51 and 52 by changing the current flowing from the pair of wires 51 and 52 between the resistor 22 and the pair of wires 51 and 52.
  • the receiving circuit 45 receives an up voltage signal obtained by converting the up current signal into a voltage change on the pair of electric wires 51 and 52 by a voltage drop at the resistor 22. According to this configuration, the parent device 2 can communicate bidirectionally with the second child device 4.
  • At least one second slave unit 4 may be a plurality of second slave units 4.
  • base unit 2 periodically outputs a synchronization signal, and sets a plurality of time slots assigned to each of the plurality of second slave units 4 between two consecutive synchronization signals.
  • the plurality of second slave units 4 are configured to transmit the downlink current signal in the time slot corresponding to each of the plurality of time slots. According to this configuration, since the master unit 2 and the plurality of second slave units 4 perform communication in a time-sharing manner, there is an advantage that communication interference between different second slave units 4 can be avoided.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)

Abstract

A second remote device (4) transmits downstream current signals by changing a current flowing through a pair of electrical wires (51, 52). In a base device (2), a resistance (22) is provided between an application unit (21) and the pair of the electrical wires (51, 52) and limits the current flowing through said electrical wires (51, 52) when a first remote device (3) short-circuits said electrical wires (51, 52) together. A reception unit (23) in the base device (2) receives downstream voltage signals obtained by converting the abovementioned downstream current signals to voltage changes along the pair of electrical wires (51, 52) via the voltage drop across the abovementioned resistance (22).

Description

自動火災報知システム、及び、自動火災報知システムの親機Automatic fire alarm system and parent machine of automatic fire alarm system
　本発明は、一般に、自動火災報知システムに関し、より詳細には、親機と子機とが一対の電線を介して電気的に接続された自動火災報知システムに関する。 The present invention generally relates to an automatic fire notification system, and more particularly to an automatic fire notification system in which a parent device and a child device are electrically connected via a pair of electric wires.
　従来、この種の自動火災報知システム（自火報システム）として、Ｐ型（Proprietary-type）とＲ型（Record-type）との２種類のシステムが存在する。Ｐ型、Ｒ型のいずれであっても、自動火災報知システムは、熱感知器や煙感知器や炎感知器等からなる子機にて火災の発生を検知し、受信機からなる親機へ子機から火災発生の通知が為されるように構成されている。 Conventionally, as this type of automatic fire alarm system (self-fire alarm system), there are two types of systems, P-type (Proprietary-type) and R-type (Record-type). Regardless of P-type or R-type, the automatic fire alarm system detects the occurrence of a fire with a slave unit consisting of a heat detector, smoke detector, flame detector, etc., and sends it to a master unit consisting of a receiver. It is configured to notify the fire occurrence from the slave unit.
　Ｐ型の自動火災報知システムは、子機が一対の電線間を電気的に短絡することで、受信機からなる親機に火災発生を通知する。Ｒ型の自動火災システムは、伝送線を伝送される伝送信号を用いて、子機が通信により親機に火災発生を通知する。一般的に、Ｒ型の自動火災報知システムは大規模の建物に用いられ、中規模以下の建物には、施工の容易性などからＰ型の自動火災報知システムが用いられることが多い。 The P-type automatic fire alarm system notifies the base unit consisting of receivers of the occurrence of a fire when the slave unit electrically short-circuits the pair of wires. In the R-type automatic fire system, a slave unit notifies the master unit of the occurrence of a fire through communication using a transmission signal transmitted through a transmission line. In general, an R-type automatic fire alarm system is used for large-scale buildings, and a P-type automatic fire alarm system is often used for buildings of medium-sized or smaller because of ease of construction.
　たとえば特許文献１には、Ｐ型の自動火災報知システムとして、親機である火災受信機より導出した複数の感知器回線に、子機である火災感知器を複数台接続した構成のシステムが開示されている。特許文献１に記載の自動火災報知システムでは、子機は、子機自身の異常検出時に、火災検出時に親機に出力すべき火災信号と同一の信号フォーマットをなす異常検出信号を、火災信号の出力時間とは異なる所定時間の間出力するように構成されている。親機は、異常検出信号が入力されたときには、この信号の入力時間の違いによって火災信号の入力と区別して、所定の警報動作をする。 For example, Patent Document 1 discloses a P-type automatic fire alarm system in which a plurality of fire detectors as slave units are connected to a plurality of sensor lines derived from a fire receiver as a master unit. Has been. In the automatic fire alarm system described in Patent Document 1, the slave unit detects an abnormality detection signal having the same signal format as the fire signal to be output to the master unit when a failure is detected in the slave unit itself. It is configured to output for a predetermined time different from the output time. When the abnormality detection signal is input, the master unit distinguishes from the input of the fire signal due to the difference in the input time of this signal, and performs a predetermined alarm operation.
特開２００２－８１５４号公報Japanese Patent Laid-Open No. 2002-8154
　しかし、特許文献１に記載の自動火災報知システムでは、親機は子機からの火災信号と異常検出信号とを区別できるに過ぎず、Ｒ型のシステムのように、伝送信号を用いた通信により子機から親機へ種々のデータを伝送することはできない。そのため、特許文献１に記載の自動火災報知システムでは、たとえば発報元の子機の特定や自動試験など、Ｒ型のシステムに搭載されている機能を付加することはできない。 However, in the automatic fire alarm system described in Patent Document 1, the master unit can only distinguish the fire signal from the slave unit and the abnormality detection signal, and by communication using a transmission signal as in the R-type system. Various data cannot be transmitted from the slave unit to the master unit. For this reason, the automatic fire alarm system described in Patent Document 1 cannot add functions installed in the R-type system, such as identification of a slave unit that issues a report or automatic test.
　本発明は上記事由に鑑みて為されており、極力簡単な構成で、Ｐ型でありながらもＲ型の機能を付加することが可能な自動火災報知システムを提供することを目的とする。 The present invention has been made in view of the above-mentioned reasons, and an object thereof is to provide an automatic fire alarm system capable of adding an R-type function while being a P-type with a simple configuration as much as possible.
　本発明の自動火災報知システムは、一対の電線間に電圧を印加する印加部を有した親機と、前記一対の電線に対して電気的に接続され、前記一対の電線間を短絡する状態と短絡しない状態とを切り替える少なくとも１台の第１の子機と、前記一対の電線に対して電気的に接続され、前記一対の電線から流れ込む電流を変化させることで前記一対の電線上に生じる電流信号からなる下り電流信号を送信する少なくとも１台の第２の子機とを備え、前記親機は、前記印加部と前記一対の電線の少なくとも一方との間に設けられ、前記第１の子機が前記一対の電線間を短絡したときに前記一対の電線に流れる電流を制限する抵抗と、前記下り電流信号を前記抵抗での電圧降下により前記一対の電線上の電圧変化に変換してなる下り電圧信号を受信する受信部とを有する。 The automatic fire alarm system of the present invention includes a master unit having an application unit that applies a voltage between a pair of electric wires, a state of being electrically connected to the pair of electric wires, and short-circuiting the pair of electric wires. Current generated on the pair of electric wires by changing the current flowing from the pair of electric wires and electrically connected to the pair of electric wires and at least one first slave unit that switches between a state in which no short circuit occurs At least one second slave unit that transmits a downstream current signal composed of a signal, and the master unit is provided between the application unit and at least one of the pair of electric wires, A resistor that limits the current that flows through the pair of wires when the machine short-circuits between the pair of wires, and the downstream current signal is converted into a voltage change on the pair of wires by a voltage drop across the resistor. Receive downstream voltage signal And a that receiver.
　本発明の自動火災報知システムの親機は、自動火災報知システムの親機であって、前記自動火災報知システムは、一対の電線に対して電気的に接続され、前記一対の電線間を短絡する状態と短絡しない状態とを切り替える少なくとも１台の第１の子機と、前記一対の電線に対して電気的に接続され、前記一対の電線から流れ込む電流を変化させることで前記一対の電線上に生じる電流信号からなる下り電流信号を送信する少なくとも１台の第２の子機とを備え、前記親機は、前記一対の電線間に電圧を印加する印加部と、前記印加部と前記一対の電線の少なくとも一方との間に設けられ、前記第１の子機が前記一対の電線間を短絡したときに前記一対の電線に流れる電流を制限する抵抗と、前記下り電流信号を前記抵抗での電圧降下により前記一対の電線上の電圧変化に変換してなる下り電圧信号を受信する受信部とを有する。 The base unit of the automatic fire notification system of the present invention is a base unit of the automatic fire notification system, and the automatic fire notification system is electrically connected to a pair of electric wires and short-circuits between the pair of electric wires. At least one first slave unit that switches between a state and a state that is not short-circuited, and the pair of wires are electrically connected to each other, and the current flowing from the pair of wires is changed on the pair of wires. At least one second slave unit that transmits a downstream current signal composed of a generated current signal, the master unit including an application unit that applies a voltage between the pair of electric wires, the application unit, and the pair of pair units A resistor that is provided between at least one of the electric wires and that restricts a current flowing through the pair of electric wires when the first slave unit short-circuits between the pair of electric wires; Due to voltage drop And a receiver for receiving a downstream voltage signal whose serial made by converting the change in voltage on a pair of wires.
　本発明は、一対の電線から流れ込む電流を変化させることで下り電流信号を送信する少なくとも１台の第２の子機を備えるので、第２の子機から親機へ種々のデータを伝送可能になる。しかも、本発明の自動火災報知システムは、第１の子機が一対の電線間を短絡したときに一対の電線に流れる電流を制限するための抵抗を、第２の子機から送信される電流信号の電圧信号への変換に兼用している。したがって、極力簡単な構成で、Ｐ型でありながらもＲ型の機能を付加することができる、という利点がある。 Since the present invention includes at least one second slave unit that transmits a downstream current signal by changing the current flowing from the pair of electric wires, various data can be transmitted from the second slave unit to the master unit. Become. Moreover, the automatic fire alarm system according to the present invention is configured such that when the first slave unit short-circuits between the pair of wires, a resistance for limiting the current flowing in the pair of wires is transmitted from the second slave unit. It is also used to convert the signal to a voltage signal. Therefore, there is an advantage that an R-type function can be added even though it is a P-type with a simple configuration as much as possible.
図１は、実施形態に係る自動火災報知システムの概略構成を示す説明図である。 Drawing 1 is an explanatory view showing a schematic structure of an automatic fire information system concerning an embodiment. 図２は、実施形態に係る自動火災報知システムの全体構成を示す説明図である。FIG. 2 is an explanatory diagram showing the overall configuration of the automatic fire alarm system according to the embodiment. 図３は、実施形態に係る自動火災報知システムの自動試験時の動作の説明図である。 Drawing 3 is an explanatory view of operation at the time of an automatic test of an automatic fire information system concerning an embodiment. 図４は、実施形態に係る自動火災報知システムの発報時の動作の説明図である。 Drawing 4 is an explanatory view of operation at the time of the alarming of the automatic fire alarm system concerning an embodiment.
　本実施形態に係る自動火災報知システム１は、図１に示すように、親機２と、少なくとも１台の第１の子機３と、少なくとも１台の第２の子機４とを備えている。 As shown in FIG. 1, the automatic fire notification system 1 according to the present embodiment includes a parent device 2, at least one first child device 3, and at least one second child device 4. Yes.
　親機２は、一対の電線５１，５２間に電圧を印加する印加部２１を有している。 The master unit 2 includes an application unit 21 that applies a voltage between the pair of electric wires 51 and 52.
　第１の子機３は、一対の電線５１，５２に対して電気的に接続され、一対の電線５１，５２間を短絡する状態と短絡しない状態とを切り替える。 The first handset 3 is electrically connected to the pair of electric wires 51 and 52, and switches between a state in which the pair of electric wires 51 and 52 are short-circuited and a state in which the pair is not short-circuited.
　第２の子機４は、一対の電線５１，５２に対して電気的に接続され、一対の電線５１，５２から流れ込む電流を変化させることで一対の電線５１，５２上に生じる電流信号からなる下り電流信号を送信する。 The second cordless handset 4 is electrically connected to the pair of electric wires 51 and 52, and includes a current signal generated on the pair of electric wires 51 and 52 by changing the current flowing from the pair of electric wires 51 and 52. A downstream current signal is transmitted.
　ここで、親機２は、抵抗２２と、受信部２３とを有している。抵抗２２は、印加部２１と一対の電線５１，５２の少なくとも一方との間に設けられ、第１の子機３が一対の電線５１，５２間を短絡したときに一対の電線５１，５２に流れる電流を制限する。受信部２３は、下り電流信号を抵抗２２での電圧降下により一対の電線５１，５２上の電圧変化に変換してなる下り電圧信号を受信する。 Here, the base unit 2 has a resistor 22 and a receiving unit 23. The resistor 22 is provided between the applying unit 21 and at least one of the pair of electric wires 51 and 52, and is connected to the pair of electric wires 51 and 52 when the first handset 3 short-circuits between the pair of electric wires 51 and 52. Limit the flowing current. The receiving unit 23 receives a down voltage signal obtained by converting the down current signal into a voltage change on the pair of electric wires 51 and 52 by a voltage drop at the resistor 22.
　すなわち、本実施形態に係る自動火災報知システム１は、第１の子機３と第２の子機４との２種類の子機が混在するシステムである。第１の子機３は、一対の電線５１，５２間を電気的に短絡することで親機２に火災発生を通知するタイプの子機である。一方、第２の子機４は、一対の電線５１，５２を伝送される伝送信号を用いて、通信により親機２に火災発生を通知するタイプの子機である。 That is, the automatic fire alarm system 1 according to the present embodiment is a system in which two types of child devices, the first child device 3 and the second child device 4, are mixed. The first slave unit 3 is a type of slave unit that notifies the master unit 2 of the occurrence of a fire by electrically short-circuiting the pair of electric wires 51 and 52. On the other hand, the second slave unit 4 is a type of slave unit that notifies the master unit 2 of the occurrence of a fire by communication using transmission signals transmitted through the pair of electric wires 51 and 52.
　そして、本実施形態に係る自動火災報知システム１は、親機２の抵抗２２を、第１の子機３と第２の子機４とで共用している。言い換えれば、この自動火災報知システム１は、第１の子機３が一対の電線５１，５２間を短絡したときに一対の電線５１，５２に流れる電流を制限するための抵抗２２を、第２の子機４から送信される電流信号を電圧信号に変換するのに兼用している。 In the automatic fire alarm system 1 according to the present embodiment, the first slave unit 3 and the second slave unit 4 share the resistance 22 of the master unit 2. In other words, the automatic fire alarm system 1 includes the second resistor 22 for limiting the current flowing through the pair of electric wires 51 and 52 when the first handset 3 short-circuits between the pair of electric wires 51 and 52. This is also used for converting the current signal transmitted from the slave unit 4 into a voltage signal.
　以下、本実施形態に係る自動火災報知システム１について詳しく説明する。ただし、以下に説明する構成は、本発明の一例に過ぎず、本発明は、下記実施形態に限定されることはなく、この実施形態以外であっても、本発明に係る技術的思想を逸脱しない範囲であれば、設計等に応じて種々の変更が可能である。 Hereinafter, the automatic fire alarm system 1 according to the present embodiment will be described in detail. However, the configuration described below is only an example of the present invention, and the present invention is not limited to the following embodiment, and the technical idea according to the present invention is not deviated from this embodiment. Various changes can be made in accordance with the design or the like as long as they are not.
　（全体構成）
　本実施形態では、自動火災報知システム１が集合住宅（マンション）に用いられる場合を例示するが、自動火災報知システム１は、集合住宅に限らず、たとえば商業施設、病院、ホテル、雑居ビル等、様々な建物に適用可能である。 (overall structure)
In this embodiment, although the case where the automatic fire alarm system 1 is used for an apartment house (apartment) is illustrated, the automatic fire alarm system 1 is not limited to an apartment house, for example, a commercial facility, a hospital, a hotel, a miscellaneous building, etc. Applicable to various buildings.
　本実施形態の自動火災報知システム１においては、図２に示すように１棟の集合住宅６に対して、１台の親機２と、複数台の第１の子機３０１，３０２，３０３…と、複数台の第２の子機４０１，４０２，４０３…とが設けられている。なお、複数台の第１の子機３０１，３０２，３０３…の各々を特に区別しないときには単に「第１の子機３」といい、複数台の第２の子機４０１，４０２，４０３…の各々を特に区別しないときには単に「第２の子機４」という。 In the automatic fire alarm system 1 of the present embodiment, as shown in FIG. 2, one master unit 2 and a plurality of first slave units 301, 302, 303... And a plurality of second slave units 401, 402, 403. When the plurality of first slave units 301, 302, 303,... Are not particularly distinguished from each other, they are simply referred to as “first slave unit 3”, and the plurality of second slave units 401, 402, 403,. When each is not particularly distinguished, it is simply referred to as “second slave unit 4”.
　さらに、この自動火災報知システム１では、一対の電線５１，５２が１～４階の階（フロア）ごとに配線されている。要するに、２本１組（２線式）の電線５１，５２は、集合住宅６全体で４組設けられている。 Furthermore, in this automatic fire alarm system 1, a pair of electric wires 51 and 52 are wired for each of the first to fourth floors. In short, four sets of two sets of one set (two-wire type) of electric wires 51 and 52 are provided in the entire apartment house 6.
　図２の例では、同じ階であっても第１の子機３と第２の子機４とが混在しているが、同じ階で第１の子機３と第２の子機４とが混在していることは必須ではない。つまり、たとえば１階および２階は第１の子機３で、３階および４階は第２の子機４というように、階ごとに第１の子機３と第２の子機４とが分かれていてもよい。この場合において、同一組の一対の電線５１，５２には同一種類の子機（第１の子機３あるいは第２の子機４）のみが電気的に接続されることになる。この場合でも、親機２から見ると、（複数組の）一対の電線５１，５２を介して第１の子機３と第２の子機４とが電気的に接続されているので、自動火災報知システム１としては、第１の子機３と第２の子機４との２種類の子機が混在することになる。 In the example of FIG. 2, the first handset 3 and the second handset 4 are mixed even on the same floor, but the first handset 3 and the second handset 4 are on the same floor. It is not indispensable to mix. That is, for example, the first handset 3 and the second handset 4 for each floor, such as the first handset 3 on the first floor and the second handset 4 on the third floor and the fourth floor. May be separated. In this case, only the same type of child device (the first child device 3 or the second child device 4) is electrically connected to the pair of electric wires 51 and 52 of the same set. Even in this case, when viewed from the base unit 2, the first handset 3 and the second handset 4 are electrically connected via a pair of electric wires 51 and 52 (a plurality of sets). As the fire alarm system 1, two types of child devices, the first child device 3 and the second child device 4, are mixed.
　ここでは、各組の電線５１，５２に対して最大３０台の子機（第１の子機３あるいは第２の子機４）が接続可能である。さらに、１台の親機２には、一対の電線５１，５２は最大で５０～２００回線（５０～２００組）接続可能である。したがって、たとえば１台の親機２に最大で１３０回線の一対の電線５１，５２が接続可能である場合、子機（第１の子機３あるいは第２の子機４）は、１台の親機２に対して最大で３９００（＝３０×１３０）台まで接続可能である。ただし、これらの数値は一例であって、これらの数値に限定する趣旨ではない。 Here, a maximum of 30 slave units (first slave unit 3 or second slave unit 4) can be connected to each pair of electric wires 51 and 52. Further, a maximum of 50 to 200 lines (50 to 200 sets) of a pair of electric wires 51 and 52 can be connected to one base unit 2. Therefore, for example, when a maximum of 130 pairs of wires 51 and 52 can be connected to one master unit 2, the slave unit (first slave unit 3 or second slave unit 4) is one Up to 3900 (= 30 × 130) units can be connected to the base unit 2. However, these numerical values are examples, and are not intended to be limited to these numerical values.
　なお、一対の電線５１，５２の終端（親機２と反対側の端部）においては、一対の電線５１，５２間が終端抵抗７を介して電気的に接続されている。そのため、親機２は、一対の電線５１，５２間に流れる電流を監視することで、一対の電線５１，５２の断線を検知することが可能である。 It should be noted that the pair of electric wires 51 and 52 are electrically connected via the terminal resistor 7 at the terminal ends (ends opposite to the base unit 2). Therefore, the main | base station 2 can detect the disconnection of a pair of electric wires 51 and 52 by monitoring the electric current which flows between a pair of electric wires 51 and 52. FIG.
　また、各組の電線５１，５２に対して第２の子機４のみが接続される場合には、最大４０～８０台の子機（第２の子機４）が接続可能である。したがって、たとえば各組の電線５１，５２に最大４０台の第２の子機４が接続可能で、１台の親機２に最大で５０回線の一対の電線５１，５２が接続可能である場合、第２の子機４は、１台の親機２に対して最大で２０００（＝４０×５０）台まで接続可能である。ただし、これらの数値は一例であって、これらの数値に限定する趣旨ではない。この場合、終端抵抗７は省略される。 Further, when only the second slave unit 4 is connected to each pair of electric wires 51 and 52, a maximum of 40 to 80 slave units (second slave unit 4) can be connected. Therefore, for example, when a maximum of 40 second cordless handsets 4 can be connected to each pair of wires 51, 52 and a maximum of 50 pairs of wires 51, 52 can be connected to one master phone 2. The second slave unit 4 can be connected to a maximum of 2000 (= 40 × 50) units with respect to one master unit 2. However, these numerical values are examples, and are not intended to be limited to these numerical values. In this case, the terminating resistor 7 is omitted.
　自動火災報知システム１は、基本的には、熱感知器や煙感知器や炎感知器等からなる子機（第１の子機３、第２の子機４）にて火災の発生を検知し、子機から受信機である親機２へ火災発生の通知が為されるように構成されている。ただし、子機（第１の子機３、第２の子機４）は、火災の発生を検知する感知器に限らず、発信機などを含んでいてもよい。発信機は、押しボタンスイッチ（図示せず）を有し、人が火災を発見した場合に押しボタンスイッチを手動で操作することにより、親機２へ火災発生の通知を行う装置である。 The automatic fire alarm system 1 basically detects the occurrence of a fire with a slave unit (first slave unit 3, second slave unit 4) comprising a heat detector, smoke detector, flame detector, etc. And it is comprised so that notification of a fire outbreak may be given from the subunit | mobile_unit to the main | base station 2 which is a receiver. However, the handset (the first handset 3 and the second handset 4) is not limited to a sensor that detects the occurrence of a fire, and may include a transmitter. The transmitter is a device that has a push button switch (not shown) and notifies the parent device 2 of the occurrence of a fire by manually operating the push button switch when a person detects a fire.
　ところで、一般的な自動火災報知システムには、Ｐ型（Proprietary-type）とＲ型（Record-type）との２種類のシステムが存在する。Ｐ型の自動火災報知システムは、子機が一対の電線間を電気的に短絡することで親機に火災発生を通知する。Ｒ型の自動火災システムは、伝送線を伝送される伝送信号を用いて、子機が通信により親機に火災発生を通知する。 By the way, there are two types of general automatic fire alarm systems: P-type (Proprietary-type) and R-type (Record-type). In the P-type automatic fire alarm system, the slave unit notifies the master unit of the occurrence of fire by electrically short-circuiting the pair of electric wires. In the R-type automatic fire system, a slave unit notifies the master unit of the occurrence of a fire through communication using a transmission signal transmitted through a transmission line.
　本実施形態の自動火災報知システム１はＰ型を基本とする。より具体的には、本実施形態では、Ｐ型の自動火災報知システムが設置されていた集合住宅において、既存の配線（電線５１，５２）をそのまま使用し、受信機（親機２）および子機（第１の子機３、第２の子機４）を入れ替えた場合を想定する。ここで、一部の子機は既存の子機をそのまま使用してもよい。なお、本実施形態の自動火災報知システム１は、新規に導入される自動火災報知システムとしても採用可能である。 The automatic fire alarm system 1 of this embodiment is based on the P type. More specifically, in this embodiment, the existing wiring (electric wires 51 and 52) is used as it is in the apartment house where the P-type automatic fire alarm system was installed, and the receiver (master 2) and child A case is assumed in which the machines (the first handset 3 and the second handset 4) are replaced. Here, some slave units may use existing slave units as they are. Note that the automatic fire notification system 1 of the present embodiment can also be employed as a newly introduced automatic fire notification system.
　すなわち、本実施形態の自動火災報知システム１は、Ｐ型でありながらも、伝送信号を用いた通信が可能な第２の子機４を用いることで、一部、Ｒ型と同様の機能が付加されている。具体的には、自動火災報知システム１は、発報時、第２の子機４が予め割り当てられた識別子（アドレス）を親機２に送信することにより、親機２において、一対の電線５１，５２の組単位ではなく子機（第２の子機４）単位で発報元の特定が可能である。また、自動火災報知システム１は、非発報時（平常時）、親機２－第２の子機４間で通信を行うことにより、親機２－第２の子機４間の通信状況や第２の子機４の動作などについて自動試験を実施することができる。 In other words, the automatic fire alarm system 1 of the present embodiment is partially P-type, but by using the second slave unit 4 capable of communication using a transmission signal, the same function as that of the R-type is used in part. It has been added. Specifically, the automatic fire alarm system 1 transmits a pair of electric wires 51 in the master unit 2 by transmitting an identifier (address) assigned in advance by the second slave unit 4 to the master unit 2 at the time of reporting. , 52 can be specified in units of slave units (second slave units 4), not in units of sets. In addition, the automatic fire alarm system 1 communicates between the master unit 2 and the second slave unit 4 during non-reporting (normal time) so that the communication status between the master unit 2 and the second slave unit 4 is communicated. In addition, an automatic test can be performed on the operation of the second handset 4 or the like.
　なお、自動火災報知システム１は、通信を利用することで親機２－第２の子機４間で様々な情報をやり取りできるので、上述したような子機単位での発報元の特定や自動試験に限らず、種々の機能を付加することができる。 In addition, since the automatic fire alarm system 1 can exchange various information between the master unit 2 and the second slave unit 4 by using communication, it is possible to specify the notification source for each slave unit as described above. Not only the automatic test but also various functions can be added.
　以下では、親機２－第２の子機４間の通信において、第２の子機４から親機２への伝送信号の流れを「下り」と呼び、親機２から第２の子機４への伝送信号の流れを「上り」と呼ぶ。 Hereinafter, in communication between the parent device 2 and the second child device 4, the flow of the transmission signal from the second child device 4 to the parent device 2 is referred to as “downward”. The flow of the transmission signal to 4 is called “upstream”.
　（親機の構成）
　本実施形態では、親機２は、子機（第１の子機３、第２の子機４）から火災発生の通知を受けるＰ型受信機である。親機２は、建物（集合住宅６）の管理室に設置される。 (Configuration of base unit)
In the present embodiment, the parent device 2 is a P-type receiver that receives a notification of the occurrence of a fire from the child devices (the first child device 3 and the second child device 4). Base unit 2 is installed in a management room of a building (apartment house 6).
　親機２は、図１に示すように、印加部２１、抵抗２２、受信部２３の他、第２の子機４に伝送信号を送信する送信部２４と、各種の表示を行う表示部２５と、ユーザからの操作入力を受け付ける操作部２６と、各部を制御する制御部２７とを有している。親機２は、子機（第１の子機３、第２の子機４）から火災発生の通知を受けると、表示部２５にて火災の発生場所等の表示を行う。 As shown in FIG. 1, the master unit 2 includes a transmission unit 24 that transmits a transmission signal to the second slave unit 4 in addition to the application unit 21, the resistor 22, and the reception unit 23, and a display unit 25 that performs various displays. And an operation unit 26 that receives an operation input from the user, and a control unit 27 that controls each unit. When receiving the notification of the occurrence of a fire from the slave unit (first slave unit 3 or second slave unit 4), the master unit 2 displays the location of the fire occurrence on the display unit 25.
　制御部２７は、マイコン（マイクロコンピュータ）を主構成とし、メモリ（図示せず）に記憶されたプログラムを実行することにより所望の機能を実現する。なお、プログラムは、予めメモリに書き込まれていてもよいし、メモリカードのような記憶媒体に記憶されて提供されてもよい。 The control unit 27 has a microcomputer as a main component, and realizes a desired function by executing a program stored in a memory (not shown). Note that the program may be written in the memory in advance, or may be provided by being stored in a storage medium such as a memory card.
　また、親機２は、防排煙設備（図示せず）や非常用放送設備（図示せず）等の他設備との連動機能も有している。これにより、親機２は、火災発生の通知を受けて、防排煙設備の防火扉を制御したり、非常用放送設備にて音響または音声により火災の発生を報知したりすることが可能である。さらに、親機２は、外部移報装置（図示せず）にも電気的に接続されており、子機から火災発生の通知を受けると、外部移報装置から外部の関係者、消防機関、警備会社等へ通報させるように構成されている。 The master unit 2 also has an interlocking function with other equipment such as smoke prevention equipment (not shown) and emergency broadcasting equipment (not shown). Thereby, the main | base station 2 can receive the notification of fire occurrence, can control the fire prevention door of smoke prevention equipment, or can notify the occurrence of fire by sound or voice in the emergency broadcasting equipment. is there. Furthermore, the master unit 2 is also electrically connected to an external message transfer device (not shown). Upon receiving a notification of the occurrence of a fire from the slave device, an external party, a fire engine, It is configured to notify the security company.
　親機２は、上述したように印加部２１から一対の電線５１，５２間に電圧を印加することにより、一対の電線５１，５２に接続されている子機（第１の子機３、第２の子機４）を含め、自動火災報知システム１全体の動作用の電源として機能する。ここでは一例として、印加部２１が一対の電線５１，５２間に印加する電圧は直流２４Ｖとするが、この値に限定する趣旨ではない。 As described above, the base unit 2 applies a voltage between the pair of electric wires 51 and 52 from the applying unit 21, thereby connecting the sub unit (the first sub unit 3 and the first sub unit 3). 2 functioning as a power source for the operation of the entire automatic fire alarm system 1. Here, as an example, the voltage applied by the application unit 21 between the pair of electric wires 51 and 52 is 24 V DC, but the present invention is not limited to this value.
　さらに、親機２は、停電に際しても自動火災報知システム１の動作用の電源を確保できるように、蓄電池を用いた予備電源２８を備えている。親機２は、図示しない商用電源、自家発電設備等を主電源とする。印加部２１は、電力の供給元を、主電源の停電時に主電源から予備電源２８に自動的に切り替え、主電源の復旧時には予備電源２８から主電源に自動的に切り替える。予備電源２８は、省令で定められる基準を満たすように容量等の仕様が決められている。 Furthermore, the master unit 2 is provided with a standby power source 28 using a storage battery so that a power source for operation of the automatic fire alarm system 1 can be secured even in the event of a power failure. Base unit 2 uses a commercial power source, a private power generation facility, etc. (not shown) as a main power source. The application unit 21 automatically switches the power supply source from the main power source to the standby power source 28 when the main power source is interrupted, and automatically switches from the standby power source 28 to the main power source when the main power source is restored. The standby power supply 28 has a capacity and other specifications determined so as to satisfy the standards defined by the ministerial ordinance.
　また、抵抗２２は、上述したように印加部２１と一対の電線５１，５２の少なくとも一方との間に設けられている。図１の例では、抵抗２２は、一対の電線５１，５２のうち一方（高電位側）の電線５１と印加部２１との間に挿入されている。ただし、この例に限らず、抵抗２２は、他方（低電位側）の電線５２と印加部２１との間に挿入されていてもよいし、一対の電線５１，５２の両方と印加部２１との間にそれぞれ挿入されていてもよい。なお、抵抗２２は、単一の抵抗器に限らず、複数の抵抗器を直列あるいは並列に接続した抵抗器群であってもよい。 Further, the resistor 22 is provided between the applying unit 21 and at least one of the pair of electric wires 51 and 52 as described above. In the example of FIG. 1, the resistor 22 is inserted between one (high potential side) of the pair of electric wires 51, 52 and the application unit 21. However, not limited to this example, the resistor 22 may be inserted between the other (low potential side) electric wire 52 and the application unit 21, or both the pair of electric wires 51 and 52 and the application unit 21. Between them. The resistor 22 is not limited to a single resistor but may be a resistor group in which a plurality of resistors are connected in series or in parallel.
　この抵抗２２は、上述したように第１の子機３が一対の電線５１，５２間を短絡したときに一対の電線５１，５２に流れる電流を制限する第１の機能と、第２の子機４から送信される電流信号を電圧信号に変換する第２の機能との２つの機能を有している。要するに、抵抗２２は、電流制限素子としての第１の機能と、電流－電圧変換素子として第２の機能とを兼ね備えている。ここでは一例として、抵抗２２の抵抗値は４００Ωあるいは６００Ωとするが、この値に限定する趣旨ではない。 As described above, the resistor 22 has a first function for limiting a current flowing through the pair of electric wires 51 and 52 when the first sub unit 3 short-circuits between the pair of electric wires 51 and 52, and a second sub unit. It has two functions, a second function for converting a current signal transmitted from the machine 4 into a voltage signal. In short, the resistor 22 has a first function as a current limiting element and a second function as a current-voltage conversion element. Here, as an example, the resistance value of the resistor 22 is 400Ω or 600Ω, but the value is not limited to this value.
　受信部２３および送信部２４は、抵抗２２と一対の電線５１，５２との間に電気的に接続されている。ただし、受信部２３に関しては、抵抗２２と一対の電線５１，５２との間に接続される構成に限らず、たとえば印加部２１と抵抗２２との間に電気的に接続されていてもよい。受信部２３は第２の子機４からの伝送信号を受信し、送信部２４は第２の子機４に伝送信号を送信するので、親機２は、第２の子機４との間で双方向に通信が可能となる。 The receiving unit 23 and the transmitting unit 24 are electrically connected between the resistor 22 and the pair of electric wires 51 and 52. However, the receiving unit 23 is not limited to the configuration connected between the resistor 22 and the pair of electric wires 51 and 52, and may be electrically connected between the applying unit 21 and the resistor 22, for example. Since the receiving unit 23 receives the transmission signal from the second slave unit 4 and the transmission unit 24 transmits the transmission signal to the second slave unit 4, the master unit 2 is connected to the second slave unit 4. Communication is possible in both directions.
　ここで、受信部２３は、第２の子機４からの伝送信号を、一対の電線５１，５２上の電圧信号（電圧変化）として受信する。つまり、第２の子機４が一対の電線５１，５２上に送出する（生じさせる）下り電流信号は、抵抗２２での電圧降下によって下り電圧信号に変換されるので、受信部２３は、第２の子機４からの伝送信号として下り電圧信号を受信する。言い換えれば、受信部２３は、第２の子機４が一対の電線５１，５２から流れ込む電流を変化させたときに一対の電線５１，５２上に生じる電圧変化（電圧信号）を、下り電圧信号として受信することになる。 Here, the receiving unit 23 receives a transmission signal from the second slave unit 4 as a voltage signal (voltage change) on the pair of electric wires 51 and 52. That is, the downstream current signal sent (generated) on the pair of electric wires 51 and 52 by the second slave unit 4 is converted into the downstream voltage signal by the voltage drop at the resistor 22, so that the receiving unit 23 The downstream voltage signal is received as a transmission signal from the second slave unit 4. In other words, the receiving unit 23 converts the voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the second child device 4 changes the current flowing from the pair of electric wires 51 and 52 into the down voltage signal. Will receive as.
　送信部２４は、一対の電線５１，５２から流れ込む電流を変化させることで一対の電線５１，５２上に生じる電流信号を、伝送信号として第２の子機４に送信する。送信部２４が一対の電線５１，５２上に送出する（生じさせる）上り電流信号は、抵抗２２での電圧降下によって上り電圧信号に変換され、第２の子機４は親機２からの伝送信号として上り電圧信号を受信する。言い換えれば、送信部２４が一対の電線５１，５２から流れ込む電流を変化させたときに一対の電線５１，５２上に生じる電圧変化（電圧信号）は、上り電圧信号として第２の子機４にて受信されることになる。 The transmission unit 24 transmits a current signal generated on the pair of electric wires 51, 52 by changing the current flowing from the pair of electric wires 51, 52 to the second slave unit 4 as a transmission signal. The upstream current signal sent (generated) on the pair of electric wires 51 and 52 by the transmission unit 24 is converted into an upstream voltage signal by a voltage drop at the resistor 22, and the second slave unit 4 transmits from the master unit 2. An upstream voltage signal is received as a signal. In other words, a voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the transmission unit 24 changes the current flowing from the pair of electric wires 51 and 52 is transmitted to the second slave unit 4 as an up voltage signal. Will be received.
　さらにまた、親機２は、一対の電線５１，５２間が第１の子機３により短絡されている状態（以下、「短絡状態」という）と、短絡されていない状態（以下、「非短絡状態」という）とを識別する識別部２９を有している。識別部２９は、一対の電線５１，５２間を流れる電流の大きさを監視し、この電流が所定の閾値を超えるか否かによって短絡状態と非短絡状態とを区別する。つまり、識別部２９は、一対の電線５１，５２間を流れる電流が閾値以下であれば非短絡状態と判断し、一対の電線５１，５２間を流れる電流が閾値を超えると短絡状態であると判断する。 Furthermore, in the master unit 2, the pair of electric wires 51 and 52 are short-circuited by the first slave unit 3 (hereinafter referred to as “short-circuit state”) and not short-circuited (hereinafter “non-short-circuit”). And an identification unit 29 for identifying the state. The identification part 29 monitors the magnitude | size of the electric current which flows between a pair of electric wires 51 and 52, and distinguishes a short circuit state and a non-short circuit state by whether this electric current exceeds a predetermined threshold value. That is, the identification unit 29 determines that the current flowing between the pair of wires 51 and 52 is equal to or less than the threshold value, and determines that the current is flowing between the pair of wires 51 and 52 exceeds the threshold value. to decide.
　（子機の構成）
　次に、子機（第１の子機３および第２の子機４）の構成について図１を参照して説明する。図１では、１組の電線５１，５２に接続された感知器からなる第１の子機３および第２の子機４を１台ずつ図示し、その他の子機については図示を省略している。 (Configuration of slave unit)
Next, the configuration of the slave units (first slave unit 3 and second slave unit 4) will be described with reference to FIG. In FIG. 1, the 1st subunit | mobile_unit 3 and the 2nd subunit | mobile_unit 4 which consist of the sensor connected to one set of electric wires 51 and 52 are illustrated one by one, and illustration is abbreviate | omitted about the other subunit | mobile_unit. Yes.
　第１の子機３は、（第１の）ダイオードブリッジ３１と、（第１の）電源回路３２と、（第１の）センサ３３と、サイリスタ３４と、駆動回路３５とを有している。 The first handset 3 includes a (first) diode bridge 31, a (first) power supply circuit 32, a (first) sensor 33, a thyristor 34, and a drive circuit 35. .
　ダイオードブリッジ３１は、入力端側に一対の電線５１，５２が電気的に接続され、出力端側に電源回路３２およびサイリスタ３４が電気的に接続されている。電源回路３２は、一対の電線５１，５２上の電力から、第１の子機３の動作用の電力を生成する。センサ３３は、火災の発生を検知する。駆動回路３５は、センサ３３の出力に応じてサイリスタ３４をオンすることで、非短絡状態から短絡状態への切り替えを行う。 The diode bridge 31 has a pair of electric wires 51 and 52 electrically connected to the input end side, and a power supply circuit 32 and a thyristor 34 electrically connected to the output end side. The power supply circuit 32 generates power for operating the first handset 3 from the power on the pair of electric wires 51 and 52. The sensor 33 detects the occurrence of a fire. The drive circuit 35 switches from the non-short-circuit state to the short-circuit state by turning on the thyristor 34 according to the output of the sensor 33.
　この構成により、第１の子機３は、火災の発生を検知すると、サイリスタ３４をオンして一対の電線５１，５２間を電気的に短絡させた短絡状態とすることにより、親機２に対して火災発生を通知する。 With this configuration, when the first handset 3 detects the occurrence of a fire, the first handset 3 turns on the thyristor 34 to establish a short-circuit state in which the pair of electric wires 51 and 52 are electrically short-circuited. Notify the occurrence of fire.
　第２の子機４は、（第２の）ダイオードブリッジ４１と、（第２の）電源回路４２と、（第２の）センサ４３と、送信回路４４と、受信回路４５と、制御回路４６と、記憶部４７とを有している。 The second handset 4 includes a (second) diode bridge 41, a (second) power supply circuit 42, a (second) sensor 43, a transmission circuit 44, a reception circuit 45, and a control circuit 46. And a storage unit 47.
　ダイオードブリッジ４１は、入力端側に一対の電線５１，５２が電気的に接続され、出力端側に電源回路４２、送信回路４４、受信回路４５が電気的に接続されている。電源回路４２は、一対の電線５１，５２上の電力から、第２の子機４の動作用の電力を生成する。センサ４３は、火災の発生を検知する。制御回路４６は、送信回路４４および受信回路４５を制御して、センサ４３の出力に応じて送信回路４４から親機２に伝送信号を送信したり、親機２からの伝送信号を受信回路４５で受信したりする。 In the diode bridge 41, a pair of electric wires 51, 52 are electrically connected to the input end side, and a power supply circuit 42, a transmission circuit 44, and a reception circuit 45 are electrically connected to the output end side. The power supply circuit 42 generates power for operation of the second slave unit 4 from the power on the pair of electric wires 51 and 52. The sensor 43 detects the occurrence of a fire. The control circuit 46 controls the transmission circuit 44 and the reception circuit 45 to transmit a transmission signal from the transmission circuit 44 to the parent device 2 according to the output of the sensor 43, or to receive the transmission signal from the parent device 2 as the reception circuit 45. Or receive.
　ここで、送信回路４４は、一対の電線５１，５２から流れ込む電流を変化させることで一対の電線５１，５２上に生じる電流信号を、伝送信号として親機２に送信する。送信回路４４が一対の電線５１，５２上に送出する（生じさせる）下り電流信号は、抵抗２２での電圧降下によって下り電圧信号に変換され、親機２は第２の子機４からの伝送信号として下り電圧信号を受信する。言い換えれば、送信回路４４が一対の電線５１，５２から流れ込む電流を変化させたときに一対の電線５１，５２上に生じる電圧変化（電圧信号）は、下り電圧信号として親機２にて受信されることになる。 Here, the transmission circuit 44 transmits a current signal generated on the pair of electric wires 51, 52 by changing the current flowing from the pair of electric wires 51, 52 to the parent device 2 as a transmission signal. The downstream current signal sent (generated) on the pair of electric wires 51 and 52 by the transmission circuit 44 is converted into a downstream voltage signal by a voltage drop at the resistor 22, and the parent device 2 transmits from the second slave device 4. A downstream voltage signal is received as a signal. In other words, a voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the transmission circuit 44 changes the current flowing from the pair of electric wires 51 and 52 is received by the parent device 2 as a down voltage signal. Will be.
　受信回路４５は、親機２からの伝送信号を、一対の電線５１，５２上の電圧信号（電圧変化）として受信する。つまり、親機２が一対の電線５１，５２上に送出する（生じさせる）上り電流信号は、抵抗２２での電圧降下によって上り電圧信号に変換されるので、受信回路４５は、親機２からの伝送信号として上り電圧信号を受信する。言い換えれば、受信回路４５は、親機２が一対の電線５１，５２から流れ込む電流を変化させたときに一対の電線５１，５２上に生じる電圧変化（電圧信号）を、上り電圧信号として受信することになる。 The receiving circuit 45 receives a transmission signal from the master unit 2 as a voltage signal (voltage change) on the pair of electric wires 51 and 52. That is, the upstream current signal sent (generated) on the pair of electric wires 51 and 52 by the parent device 2 is converted into an upstream voltage signal by the voltage drop at the resistor 22, so that the receiving circuit 45 is connected from the parent device 2. As a transmission signal, an upstream voltage signal is received. In other words, the receiving circuit 45 receives a voltage change (voltage signal) generated on the pair of electric wires 51 and 52 when the parent device 2 changes the current flowing from the pair of electric wires 51 and 52 as an up voltage signal. It will be.
　記憶部４７は、第２の子機４に予め割り当てられている識別子（アドレス）を少なくとも記憶する。つまり、複数台の第２の子機４０１，４０２，４０３…には、それぞれ固有の識別子が割り当てられている。各識別子は、複数台の第２の子機４０１，４０２，４０３…の各々の設置場所（たとえば部屋番号）と対応付けられて親機２に登録される。 The storage unit 47 stores at least an identifier (address) assigned in advance to the second slave unit 4. That is, a unique identifier is assigned to each of the plurality of second slave units 401, 402, 403. Each identifier is registered in the parent device 2 in association with each installation location (for example, a room number) of the plurality of second child devices 401, 402, 403.
　この構成により、第２の子機４は、火災の発生を検知すると、一対の電線５１，５２を伝送される伝送信号を用いた通信により、少なくとも記憶部４７に記憶されている識別子を含むデータを親機２に送信することで、親機２に火災発生を通知する。このとき、親機２においては、第２の子機４からの火災発生の通知を受けると、受信データに含まれている識別子から、発報元の第２の子機４を特定することができる。 With this configuration, when the second slave unit 4 detects the occurrence of a fire, the second slave unit 4 includes at least an identifier stored in the storage unit 47 by communication using a transmission signal transmitted through the pair of electric wires 51 and 52. Is sent to the master unit 2 to notify the master unit 2 of the occurrence of a fire. At this time, when receiving the notification of the occurrence of the fire from the second slave unit 4, the master unit 2 may identify the second slave unit 4 that is the reporting source from the identifier included in the received data. it can.
　なお、主電源の停電時には、子機（第１の子機３、第２の子機４）は、親機２の予備電源２８からの電力供給で動作することになる。１台の親機２に対して多数台の子機が接続されることもあるので、予備電源２８からの電力供給で自動火災報知システム１が規定時間以上動作するためには、子機（第１の子機３、第２の子機４）は１台当たりの消費電力を比較的小さく抑える必要がある。 In addition, at the time of a power failure of the main power supply, the slave units (first slave unit 3 and second slave unit 4) operate with power supplied from the standby power supply 28 of the master unit 2. Since a large number of slave units may be connected to a single master unit 2, in order for the automatic fire alarm system 1 to operate for a specified time or longer with power supplied from the standby power supply 28, It is necessary to keep the power consumption per unit relatively small for the first slave unit 3 and the second slave unit 4).
　（動作）
　以下、本実施形態に係る自動火災報知システム１の動作について説明する。ここでは、親機２－第２の子機４間の通信を伴う動作について説明すべく、自動試験時の動作と発報時の動作とを例に説明する。 (Operation)
Hereinafter, the operation of the automatic fire alarm system 1 according to the present embodiment will be described. Here, in order to explain an operation involving communication between the parent device 2 and the second child device 4, an operation at the time of automatic test and an operation at the time of alarm will be described as examples.
　まず、自動試験時の自動火災報知システム１の動作について図３を参照して説明する。図３では、横軸を時間軸、縦軸を電圧値として、一対の電線５１，５２における電圧波形を表している。 First, the operation of the automatic fire alarm system 1 during the automatic test will be described with reference to FIG. In FIG. 3, the voltage waveform in a pair of electric wires 51 and 52 is represented with the horizontal axis as the time axis and the vertical axis as the voltage value.
　自動試験を実施する際、親機２は、動作モードを通常モードから自動試験モードへ切り替える。親機２は、自動試験モードになると、時分割方式の試験信号を一対の電線５１，５２に対して繰り返し送信する。試験信号は、図３に示すように１フレームごとに時間軸方向において複数の区間に分かれた形式の電圧波形からなる。すなわち、試験信号は、同期帯１０１と、送信帯１０２と、返信帯１０３との３つの区間（期間）からなる時分割信号である。図３では試験信号を１フレーム分のみ図示している。 When performing the automatic test, the base unit 2 switches the operation mode from the normal mode to the automatic test mode. When the base unit 2 enters the automatic test mode, the base unit 2 repeatedly transmits a time-division test signal to the pair of electric wires 51 and 52. As shown in FIG. 3, the test signal consists of a voltage waveform in a format divided into a plurality of sections in the time axis direction for each frame. That is, the test signal is a time-division signal composed of three sections (periods) of the synchronization band 101, the transmission band 102, and the reply band 103. In FIG. 3, only one frame of the test signal is shown.
　親機２は、印加部２１から一対の電線５１，５２に印加している電圧を周期的に変化させることで、同期帯１０１において同期信号を周期的に発生する。さらに、親機２は、送信帯１０２において、送信部２４から第２の子機４に対して要求データを送信する。また、返信帯１０３は、親機２が第２の子機４からの返送データを受信するための期間である。しかも、返信帯１０３は、複数台の第２の子機４０１，４０２，４０３…の各々に割り当てられるように、複数のタイムスロットＴ１，Ｔ２，Ｔ３…に分割されている。図３の例では、１組の電線５１，５２に接続可能な第２の子機４の最大台数が６４台である場合を想定し、返信帯１０３は、６４個のタイムスロットＴ１～Ｔ６４に分割されている。 The master unit 2 periodically generates a synchronization signal in the synchronization band 101 by periodically changing the voltage applied to the pair of electric wires 51 and 52 from the application unit 21. Furthermore, base unit 2 transmits request data from transmission unit 24 to second handset 4 in transmission band 102. The reply band 103 is a period for the base unit 2 to receive return data from the second handset 4. Moreover, the reply band 103 is divided into a plurality of time slots T1, T2, T3... So as to be assigned to each of the plurality of second slave units 401, 402, 403. In the example of FIG. 3, it is assumed that the maximum number of the second handset 4 that can be connected to one set of electric wires 51 and 52 is 64, and the reply band 103 includes 64 time slots T1 to T64. It is divided.
　言い換えれば、親機２は、周期的に同期信号を出力し、連続する２回の同期信号の間に、送信帯１０２と、複数台の第２の子機４０１，４０２，４０３…の各々に割り当てられる複数のタイムスロットＴ１～Ｔ６４を設定する。親機２は、送信帯１０２において、実施する自動試験の項目を指示する要求データを送信部２４から第２の子機４へ送信する。なお、自動試験の項目としては、たとえば生存確認（キープアライブ）、第２の子機４の自己診断等が含まれている。 In other words, the base unit 2 periodically outputs a synchronization signal, and transmits to the transmission band 102 and each of the plurality of second slave units 401, 402, 403... A plurality of assigned time slots T1 to T64 are set. In the transmission band 102, the base unit 2 transmits request data for instructing items of an automatic test to be performed from the transmission unit 24 to the second handset 4. The items of the automatic test include, for example, survival confirmation (keep alive), self-diagnosis of the second slave unit 4, and the like.
　第２の子機４は、同期信号を受信すると、動作モードを待機モードから受信モードへ切り替え、送信帯１０２において親機２からの要求データを受信回路４５にて受信する。その後、第２の子機４は、返信帯１０３における複数のタイムスロットＴ１～Ｔ６４のうち自身に割り当てられているタイムスロットにて、送信回路４４から親機２へ返送データを送信する。返送データは、送信元となる第２の子機４の識別子を少なくとも含み、さらに正常、異常（あるいは故障）といった試験結果を含む。以降、第２の子機４は、同期信号を受信する度に同期をとり、送信帯１０２での要求データの受信と、返信帯１０３での返送データの送信とを繰り返す。 When the second slave unit 4 receives the synchronization signal, the second slave unit 4 switches the operation mode from the standby mode to the reception mode, and the request circuit 45 receives the request data from the master unit 2 in the transmission band 102. Thereafter, the second slave unit 4 transmits the return data from the transmission circuit 44 to the master unit 2 in the time slot allocated to itself among the plurality of time slots T1 to T64 in the reply band 103. The return data includes at least the identifier of the second slave unit 4 that is the transmission source, and further includes test results such as normal and abnormal (or failure). Thereafter, the second slave unit 4 is synchronized every time a synchronization signal is received, and repeats reception of request data in the transmission band 102 and transmission of return data in the reply band 103.
　次に、発報時の自動火災報知システム１の動作について図４を参照して説明する。図４では、横軸を時間軸、縦軸を電圧値として、一対の電線５１，５２における電圧波形を表している。 Next, the operation of the automatic fire alarm system 1 when an alarm is issued will be described with reference to FIG. In FIG. 4, the horizontal axis represents a time axis and the vertical axis represents a voltage value, and voltage waveforms in the pair of electric wires 51 and 52 are represented.
　この場合、親機２は通常モードで動作し、第２の子機４は待機モードで動作している。非発報時（平常時）において、親機２は印加部２１から一対の電線５１，５２間に一定電圧（たとえば直流２４Ｖ）を印加している。ここでは、第２の子機４は、送信回路４４での電流の引き込み量を調節することにより、一対の電線５１，５２間の電圧を「Ｖ３」から「Ｖ２」、「Ｖ１」（Ｖ３＞Ｖ２＞Ｖ１）へと、２段階まで段階的に引き下げ可能に構成されている。 In this case, the master unit 2 operates in the normal mode, and the second slave unit 4 operates in the standby mode. At the time of non-reporting (normal time), the base unit 2 applies a constant voltage (for example, DC 24V) between the application unit 21 and the pair of electric wires 51 and 52. Here, the second handset 4 adjusts the amount of current drawn in the transmission circuit 44 to change the voltage between the pair of electric wires 51 and 52 from “V3” to “V2”, “V1” (V3>). V2> V1) can be lowered step by step up to two steps.
　第２の子機４は、火災の発生を検知すると、送信回路４４にて電流を引き込むことで、一対の電線５１，５２間の電圧を「Ｖ３」から１段階引き下げて「Ｖ２」とし、火災発生を親機２に通知する。電圧を「Ｖ２」に引き下げてから待機時間の経過後、第２の子機４は、自身の識別子を発報データとして送信回路４４から親機２に送信する（図４のＳ１）。このとき、第２の子機４は、送信回路４４にてさらに電流を引き込み一対の電線５１，５２間の電圧をさらに１段階引き下げて、「Ｖ２」と「Ｖ１」とを交互に切り替えることによって発報データを送信する。待機時間は、第２の子機４に固有の識別子（アドレス）に基づいて設定され、識別子が異なる第２の子機４同士での発報データのコリジョン（衝突）が回避できる。 When detecting the occurrence of a fire, the second slave unit 4 draws a current in the transmission circuit 44, thereby reducing the voltage between the pair of electric wires 51 and 52 by one step from “V3” to “V2”. The occurrence is notified to the base unit 2. After the standby time elapses after the voltage is lowered to “V2”, the second slave unit 4 transmits its own identifier as notification data from the transmission circuit 44 to the master unit 2 (S1 in FIG. 4). At this time, the second handset 4 further draws a current in the transmission circuit 44 to further reduce the voltage between the pair of electric wires 51 and 52 by one step, and alternately switches between “V2” and “V1”. Send alert data. The standby time is set based on an identifier (address) unique to the second slave unit 4, and the collision (collision) of the notification data between the second slave units 4 having different identifiers can be avoided.
　第２の子機４は、発報データを送信後、送信回路４４での電流の引き込みを終了し、一対の電線５１，５２間の電圧を一旦「Ｖ３」に戻す。第２の子機４は、引き続き火災の発生を検知していると、再度、一対の電線５１，５２間の電圧を「Ｖ３」から「Ｖ２」に引き下げて火災発生を親機２に通知し、待機時間の経過後に発報データを送信する（Ｓ２）。 After transmitting the notification data, the second slave unit 4 finishes drawing the current in the transmission circuit 44, and temporarily returns the voltage between the pair of electric wires 51 and 52 to “V3”. When the second slave unit 4 continues to detect the occurrence of a fire, the voltage between the pair of electric wires 51 and 52 is lowered again from “V3” to “V2” to notify the master unit 2 of the fire occurrence. The alert data is transmitted after the standby time has elapsed (S2).
　また、第２の子機４が、他設備を連動させるための連動データを発生する感知器（連動感知器）である場合、第２の子機４は、火災の発生を検知すると、発報データに代えて連動データを親機２に送信する（Ｓ３）。連動データは、発報データと同様に第２の子機４の識別子を含み、さらに、他設備を連動させるために必要な連動情報を含むデータである。この場合であっても、第２の子機４は、送信回路４４にて電流を引き込むことで、一対の電線５１，５２間の電圧を「Ｖ３」から「Ｖ２」に引き下げて火災発生を親機２に通知し、待機時間の経過後に連動データを送信する。連動データの送信時、第２の子機４は、送信回路４４にてさらに電流を引き込み一対の電線５１，５２間の電圧をさらに１段階引き下げて、「Ｖ２」と「Ｖ１」とを交互に切り替えることによって連動データを送信する。 Further, when the second slave unit 4 is a sensor that generates interlocking data for interlocking with other equipment (interlocking sensor), the second slave unit 4 is notified when the occurrence of a fire is detected. Linked data is transmitted to base unit 2 instead of data (S3). The interlocking data is data including the identifier of the second handset 4 as well as the notification data, and further including interlocking information necessary for interlocking other equipment. Even in this case, the second slave unit 4 draws a current in the transmission circuit 44, thereby reducing the voltage between the pair of electric wires 51 and 52 from “V3” to “V2”. The machine 2 is notified, and the interlocking data is transmitted after the standby time has elapsed. At the time of transmission of the interlocking data, the second slave unit 4 further draws current in the transmission circuit 44 and further reduces the voltage between the pair of electric wires 51 and 52 by one step, and alternately “V2” and “V1”. Link data is transmitted by switching.
　連動感知器である第２の子機４は、連動データを送信後、送信回路４４での電流の引き込みを終了し、一対の電線５１，５２間の電圧を一旦「Ｖ３」に戻す。連動感知器である第２の子機４は、引き続き火災の発生を検知していると、再度、一対の電線５１，５２間の電圧を「Ｖ３」から「Ｖ２」に引き下げて火災発生を親機２に通知し、待機時間の経過後に連動データを送信する（Ｓ４）。 After transmitting the interlocking data, the second slave unit 4 that is the interlocking sensor finishes drawing the current in the transmission circuit 44, and temporarily returns the voltage between the pair of electric wires 51 and 52 to “V3”. When the second slave unit 4 that is the interlocking sensor continues to detect the occurrence of a fire, the voltage between the pair of electric wires 51 and 52 is lowered from “V3” to “V2” again to detect the occurrence of the fire. The device 2 is notified, and the interlocking data is transmitted after the standby time has elapsed (S4).
　このように、第２の子機４は、火災発生時に２段階に分けて電流を引き込むことで、同期信号ではなく、一対の電線５１，５２間の電圧が「Ｖ３」から「Ｖ２」に下がったことをトリガにして、発報データあるいは連動データの送信を行うことができる。この場合、第２の子機４は、一対の電線５１，５２間の電圧を「Ｖ３」から「Ｖ２」に引き下げて親機２に火災発生を通知している最中に、発報データあるいは連動データを送信できる。 In this way, the second slave unit 4 draws current in two stages in the event of a fire, so that the voltage between the pair of electric wires 51 and 52 decreases from “V3” to “V2” instead of the synchronization signal. This can be used as a trigger to transmit alert data or interlocking data. In this case, the second slave unit 4 reduces the voltage between the pair of electric wires 51 and 52 from “V3” to “V2” and notifies the master unit 2 of the occurrence of a fire or Linked data can be sent.
　親機２は、第２の子機４からの発報データを受信部２３にて受信すると、発報データに含まれる識別子に基づいて、発報元の第２の子機４を特定する。発報元を特定した親機２は、発報元の第２の子機４の設置場所（たとえば部屋番号）を表示部２５に表示し、ユーザに対して、火災の発生だけでなく火元の特定まで可能な形で報知を行う。また、親機２は、第２の子機４からの連動データを受信部２３にて受信すると、報知に加えて、他設備に連動信号を送信して他設備との連動を実行する。 When the base unit 2 receives the alert data from the second slave unit 4 at the receiving unit 23, the base unit 2 specifies the second slave unit 4 that is the source of the alert based on the identifier included in the alert data. The base unit 2 that has specified the reporting source displays the installation location (for example, the room number) of the second slave unit 4 that is the reporting source on the display unit 25, and not only the occurrence of fire but also the fire source. Notification in a form possible until In addition, when receiving the interlocking data from the second slave unit 4 at the receiving unit 23, the master unit 2 transmits an interlocking signal to other equipment and performs interlocking with the other equipment in addition to the notification.
　なお、第２の子機４が発報データや連動データを送信するタイミングは、上述したように一対の電線５１，５２間の電圧を「Ｖ３」から「Ｖ２」に引き下げて火災発生を親機２に通知している最中に限らない。つまり、第２の子機４は、たとえば一対の電線５１，５２間の電圧を「Ｖ３」から「Ｖ２」に引き下げて火災発生を親機２に通知する前、あるいは後で、発報データや連動データを送信する構成であってもよい。この場合、第２の子機４が一対の電線５１，５２間の電圧を段階的に引き下げる構成は必須ではない。 As described above, the timing at which the second slave unit 4 transmits the alarm data and the interlocking data is as follows. The voltage between the pair of electric wires 51 and 52 is lowered from “V3” to “V2” to prevent the fire from occurring. It is not limited to notifying 2. That is, for example, the second slave unit 4 lowers the voltage between the pair of electric wires 51 and 52 from “V3” to “V2” to notify the master unit 2 of the occurrence of the fire, or after that, The structure which transmits interlocking data may be sufficient. In this case, the configuration in which the second slave unit 4 lowers the voltage between the pair of electric wires 51 and 52 in stages is not essential.
　ところで、上述したように自動試験時や発報時に行われる親機２－第２の子機４間の通信は、この第２の子機４が接続されている一対の電線５１，５２間が第１の子機３により短絡されていない非短絡状態を前提としている。言い換えれば、第１の子機３がサイリスタ３４をオンして一対の電線５１，５２間を電気的に短絡させた短絡状態では、この一対の電線５１，５２に接続された第２の子機４と親機２との間において上述したような通信は行われない。よって、火災発生時、第２の子機４より先に第１の子機３が火災の発生を検知した場合、親機２に対する火災発生の通知は、第２の子機４ではなく第１の子機３によって行われる。 By the way, as described above, communication between the master unit 2 and the second slave unit 4 performed at the time of the automatic test or at the time of reporting is performed between the pair of electric wires 51 and 52 to which the second slave unit 4 is connected. It is premised on a non-short-circuit state that is not short-circuited by the first handset 3. In other words, in the short-circuit state in which the first handset 3 turns on the thyristor 34 to electrically short-circuit the pair of electric wires 51 and 52, the second handset connected to the pair of electric wires 51 and 52. Communication as described above is not performed between 4 and the parent device 2. Therefore, when the first child device 3 detects the occurrence of a fire prior to the second child device 4 in the event of a fire, the notification of the fire occurrence to the parent device 2 is not the second child device 4 but the first child device 4 This is performed by the handset 3.
　（効果）
　以上説明した本実施形態の自動火災報知システム１によれば、一対の電線５１，５２から流れ込む電流を変化させることで下り電流信号を送信する少なくとも１台の第２の子機４を備えるので、子機（第２の子機４）から親機２へ種々のデータを伝送可能になる。そのため、自動火災報知システム１は、たとえば上述した自動試験や発報元の特定が可能になる。自動試験が可能になれば、定期的に行うことが義務付けられている試験の手間が省け、人件費の削減などが期待できる。また、発報元の特定が可能になれば、消火活動、避難誘導などが効率的に行える利点がある。 (effect)
According to the automatic fire alarm system 1 of the present embodiment described above, since at least one second slave unit 4 that transmits a downstream current signal by changing the current flowing from the pair of electric wires 51 and 52 is provided. Various data can be transmitted from the slave unit (second slave unit 4) to the master unit 2. Therefore, the automatic fire notification system 1 can identify the automatic test and the report source, for example, as described above. If automatic testing becomes possible, the labor of testing that is required to be performed regularly can be saved and labor costs can be reduced. In addition, if the source of the report can be specified, there is an advantage that fire extinguishing activities and evacuation guidance can be efficiently performed.
　しかも、本実施形態の自動火災報知システム１は、第１の子機３が一対の電線５１，５２間を短絡したときに一対の電線５１，５２に流れる電流を制限するための抵抗２２を、第２の子機４から送信される電流信号の電圧信号への変換に兼用している。そのため、一対の電線５１，５２に対して電流電圧変換器を親機２と別に設ける必要はなく、第１の子機３と第２の子機４とが混在する自動火災報知システム１の構成を簡略化することができる。その結果、本実施形態に係る自動火災報知システム１は、極力簡単な構成で、Ｐ型でありながらもＲ型の機能を付加することができる、という利点がある。 Moreover, the automatic fire alarm system 1 of the present embodiment includes a resistor 22 for limiting the current flowing through the pair of electric wires 51 and 52 when the first handset 3 short-circuits between the pair of electric wires 51 and 52. This is also used to convert the current signal transmitted from the second slave unit 4 into a voltage signal. Therefore, it is not necessary to provide a current-voltage converter separately from the parent device 2 for the pair of electric wires 51 and 52, and the configuration of the automatic fire alarm system 1 in which the first child device 3 and the second child device 4 are mixed. Can be simplified. As a result, the automatic fire alarm system 1 according to the present embodiment has an advantage that it can add an R-type function while being P-type with a simple configuration as much as possible.
　また、自動火災報知システム１においては、本実施形態のように、親機２は送信部２４を有し、第２の子機４は受信回路４５を有することが好ましい。送信部２４は、抵抗２２と一対の電線５１，５２との間に、一対の電線５１，５２から流れ込む電流を変化させることで電流信号からなる上り電流信号を一対の電線５１，５２上に生じさせる。受信回路４５は、上り電流信号を抵抗２２での電圧降下により一対の電線５１，５２上の電圧変化に変換してなる上り電圧信号を受信する。この構成によれば、親機２は第２の子機４との間で双方向に通信可能となる。 Further, in the automatic fire alarm system 1, it is preferable that the parent device 2 has the transmission unit 24 and the second child device 4 has the reception circuit 45 as in the present embodiment. The transmission unit 24 generates an upward current signal composed of a current signal on the pair of wires 51 and 52 by changing the current flowing from the pair of wires 51 and 52 between the resistor 22 and the pair of wires 51 and 52. Let The receiving circuit 45 receives an up voltage signal obtained by converting the up current signal into a voltage change on the pair of electric wires 51 and 52 by a voltage drop at the resistor 22. According to this configuration, the parent device 2 can communicate bidirectionally with the second child device 4.
　さらに、自動火災報知システム１において、本実施形態のように、少なくとも１台の第２の子機４は複数台の第２の子機４であってもよい。この場合、親機２は、周期的に同期信号を出力し、連続する２回の同期信号の間に、複数台の第２の子機４の各々に割り当てられる複数のタイムスロットを設定することが好ましい。この場合、複数台の第２の子機４は、複数のタイムスロットのうち各々に対応するタイムスロットにおいて、下り電流信号を送信するように構成されていることが好ましい。この構成によれば、親機２と複数台の第２の子機４とは時分割方式で通信を行うため、異なる第２の子機４間での通信の干渉を回避できる利点がある。 Furthermore, in the automatic fire alarm system 1, as in the present embodiment, at least one second slave unit 4 may be a plurality of second slave units 4. In this case, base unit 2 periodically outputs a synchronization signal, and sets a plurality of time slots assigned to each of the plurality of second slave units 4 between two consecutive synchronization signals. Is preferred. In this case, it is preferable that the plurality of second slave units 4 are configured to transmit the downlink current signal in the time slot corresponding to each of the plurality of time slots. According to this configuration, since the master unit 2 and the plurality of second slave units 4 perform communication in a time-sharing manner, there is an advantage that communication interference between different second slave units 4 can be avoided.
　１　自動火災報知システム
　２　親機
　３　第１の子機
　４　第２の子機
　２１　印加部
　２２　抵抗
　２３　受信部
　２４　送信部
　４５　受信回路
　５１，５２　一対の電線 DESCRIPTION OF SYMBOLS 1 Automatic fire alarm system 2 Parent | base station 3 1st subunit | mobile_unit 4 2nd subunit | mobile_unit 21 Application part 22 Resistance 23 Reception part 24 Transmission part 45 Reception circuit 51,52 A pair of electric wire

Claims (4)

  1. 　一対の電線間に電圧を印加する印加部を有した親機と、
    　前記一対の電線に対して電気的に接続され、前記一対の電線間を短絡する状態と短絡しない状態とを切り替える少なくとも１台の第１の子機と、
    　前記一対の電線に対して電気的に接続され、前記一対の電線から流れ込む電流を変化させることで前記一対の電線上に生じる電流信号からなる下り電流信号を送信する少なくとも１台の第２の子機とを備え、
    　前記親機は、前記印加部と前記一対の電線の少なくとも一方との間に設けられ、前記第１の子機が前記一対の電線間を短絡したときに前記一対の電線に流れる電流を制限する抵抗と、前記下り電流信号を前記抵抗での電圧降下により前記一対の電線上の電圧変化に変換してなる下り電圧信号を受信する受信部とを有する
    　自動火災報知システム。     A master unit having an application unit for applying a voltage between a pair of wires;
    At least one first handset that is electrically connected to the pair of wires and switches between a state of short-circuiting between the pair of wires and a state of not short-circuiting;
    At least one second child that is electrically connected to the pair of electric wires and transmits a downstream current signal composed of a current signal generated on the pair of electric wires by changing a current flowing from the pair of electric wires. Equipped with a machine,
    The parent device is provided between the application unit and at least one of the pair of electric wires, and restricts a current flowing through the pair of electric wires when the first child device short-circuits between the pair of electric wires. An automatic fire alarm system comprising: a resistor; and a receiving unit that receives a downstream voltage signal obtained by converting the downstream current signal into a voltage change on the pair of wires by a voltage drop at the resistor.
  2. 　前記親機は、前記抵抗と前記一対の電線との間に、前記一対の電線から流れ込む電流を変化させることで電流信号からなる上り電流信号を前記一対の電線上に生じさせる送信部をさらに有し、
    　前記第２の子機は、前記上り電流信号を前記抵抗での電圧降下により前記一対の電線上の電圧変化に変換してなる上り電圧信号を受信する受信回路を有する
    　請求項１に記載の自動火災報知システム。     The master unit further includes a transmitter between the resistor and the pair of electric wires to generate an upward current signal composed of a current signal on the pair of electric wires by changing a current flowing from the pair of electric wires. And
    2. The automatic receiving device according to claim 1, wherein the second slave unit includes a receiving circuit that receives an upstream voltage signal obtained by converting the upstream current signal into a voltage change on the pair of wires by a voltage drop at the resistor. Fire alarm system.
  3. 　少なくとも１台の前記第２の子機は複数台の第２の子機であって、
    　前記親機は、周期的に同期信号を出力し、連続する２回の前記同期信号の間に、前記複数台の第２の子機の各々に割り当てられる複数のタイムスロットを設定し、
    　前記複数台の第２の子機は、前記複数のタイムスロットのうち各々に対応するタイムスロットにおいて、前記下り電流信号を送信するように構成されている
    　請求項１または２に記載の自動火災報知システム。     At least one of the second slave units is a plurality of second slave units,
    The master unit periodically outputs a synchronization signal, and sets a plurality of time slots allocated to each of the plurality of second slave units between the two consecutive synchronization signals,
    The automatic fire notification according to claim 1 or 2, wherein the plurality of second slave units are configured to transmit the downstream current signal in a time slot corresponding to each of the plurality of time slots. system.
  4. 　自動火災報知システムの親機であって、
    　前記自動火災報知システムは、
    　一対の電線に対して電気的に接続され、前記一対の電線間を短絡する状態と短絡しない状態とを切り替える少なくとも１台の第１の子機と、
    　前記一対の電線に対して電気的に接続され、前記一対の電線から流れ込む電流を変化させることで前記一対の電線上に生じる電流信号からなる下り電流信号を送信する少なくとも１台の第２の子機とを備え、
    　前記親機は、
    　前記一対の電線間に電圧を印加する印加部と、
    　前記印加部と前記一対の電線の少なくとも一方との間に設けられ、前記第１の子機が前記一対の電線間を短絡したときに前記一対の電線に流れる電流を制限する抵抗と、
    　前記下り電流信号を前記抵抗での電圧降下により前記一対の電線上の電圧変化に変換してなる下り電圧信号を受信する受信部とを有する
    　自動火災報知システムの親機。     It is the main unit of the automatic fire alarm system,
    The automatic fire alarm system is
    At least one first slave unit that is electrically connected to the pair of wires and switches between a state of short-circuiting between the pair of wires and a state of not short-circuiting;
    At least one second child that is electrically connected to the pair of electric wires and transmits a downstream current signal composed of a current signal generated on the pair of electric wires by changing a current flowing from the pair of electric wires. Equipped with a machine,
    The base unit is
    An application unit for applying a voltage between the pair of wires;
    A resistor that is provided between the application unit and at least one of the pair of electric wires, and that limits a current flowing through the pair of electric wires when the first slave unit short-circuits between the pair of electric wires;
    A master unit for an automatic fire alarm system, comprising: a receiving unit that receives a down voltage signal obtained by converting the down current signal into a voltage change on the pair of electric wires by a voltage drop at the resistor.
PCT/JP2015/001973 2014-04-18 2015-04-08 Automatic fire alarm system and base device for automatic fire alarm system WO2015159510A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15780162.2A EP3133568B1 (en) 2014-04-18 2015-04-08 Automatic fire alarm system and base device for automatic fire alarm system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014086871A JP6365971B2 (en) 2014-04-18 2014-04-18 Automatic fire alarm system
JP2014-086871 2014-04-18

Publications (1)

Publication Number Publication Date
WO2015159510A1 true WO2015159510A1 (en) 2015-10-22

Family

ID=54323735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/001973 WO2015159510A1 (en) 2014-04-18 2015-04-08 Automatic fire alarm system and base device for automatic fire alarm system

Country Status (3)

Country Link
EP (1) EP3133568B1 (en)
JP (1) JP6365971B2 (en)
WO (1) WO2015159510A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017117358A (en) * 2015-12-25 2017-06-29 パナソニックＩｐマネジメント株式会社 Disaster prevention system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002109649A (en) * 2000-09-28 2002-04-12 Hochiki Corp Fire receiver
JP2003109138A (en) * 2001-09-28 2003-04-11 Nohmi Bosai Ltd Fire alarm facility
JP2011243106A (en) * 2010-05-20 2011-12-01 Hochiki Corp Fire alarm system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0962957A (en) * 1995-08-21 1997-03-07 Hochiki Corp Reception circuit for fire alarm
JP3405031B2 (en) * 1995-12-21 2003-05-12 松下電工株式会社 Disaster prevention system
JP2003203279A (en) * 2002-01-08 2003-07-18 Hochiki Corp Testing device of fire alarm equipment
EP2100279B1 (en) * 2007-01-17 2014-08-20 Panasonic Corporation Wireless fire alarm system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002109649A (en) * 2000-09-28 2002-04-12 Hochiki Corp Fire receiver
JP2003109138A (en) * 2001-09-28 2003-04-11 Nohmi Bosai Ltd Fire alarm facility
JP2011243106A (en) * 2010-05-20 2011-12-01 Hochiki Corp Fire alarm system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017117358A (en) * 2015-12-25 2017-06-29 パナソニックＩｐマネジメント株式会社 Disaster prevention system

Also Published As

Publication number Publication date
JP2015207124A (en) 2015-11-19
EP3133568A4 (en) 2017-04-19
JP6365971B2 (en) 2018-08-01
EP3133568A1 (en) 2017-02-22
EP3133568B1 (en) 2020-07-15

Similar Documents

Publication Publication Date Title
JP2018190096A (en) Relay system, and self-fire alarm system provided with the same
JP6464519B2 (en) Automatic fire alarm system slave unit and automatic fire alarm system using the same
JP6365971B2 (en) Automatic fire alarm system
WO2016021115A1 (en) Slave unit for automatic fire alarm system, and automatic fire alarm system in which same is used
JP2017084180A (en) Automatic fire alarm system
JP2014206872A (en) Disaster prevention reception system
JP6618003B2 (en) Automatic fire alarm system slave unit, master unit, and automatic fire alarm system using the same
JP2015207126A (en) communication terminal and automatic fire alarm system using the same
JP6481933B2 (en) Automatic fire alarm system slave unit and automatic fire alarm system using the same
JP6481940B2 (en) Communication apparatus and communication system using the same
JP6558695B2 (en) Automatic fire alarm system
JP6421912B2 (en) Automatic fire alarm system slave unit and automatic fire alarm system using the same
JP6655808B2 (en) Handset of automatic fire alarm system and automatic fire alarm system using the same
JP6471968B2 (en) Automatic fire alarm system slave unit and automatic fire alarm system using the same
JP6519918B2 (en) Handset of automatic fire alarm system, parent machine of automatic fire alarm system, and automatic fire alarm system using them
JP6497617B2 (en) Automatic fire alarm system slave unit, master unit, and automatic fire alarm system using them
JP2018190097A (en) Control device, optical alarm apparatus and self-fire-alarm system
JP7477282B2 (en) Alarm system
JP6579510B2 (en) Automatic fire alarm system slave unit, master unit, and automatic fire alarm system using the same
JP7336891B2 (en) Repeaters and fire alarm systems
JP6646835B2 (en) Master unit and automatic fire alarm system
JP2017129975A (en) Automatic fire notification system
JP2020047309A (en) Machine, and automatic fire alarm system
JP2016149029A (en) Slave machine and master machine of automatic fire alarm system, and automatic fire alarm system using them
JP6481934B2 (en) Automatic fire alarm system slave unit and automatic fire alarm system using the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15780162

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2015780162

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2015780162

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE