CN1519785A - Household fire precaution alarm unit - Google Patents

Abstract

The alarm unit is suitable to modern household kitchen, especially to kitchen for three persons family in modern city. The typed kitchen designed based on regulation people's activity in it includes infrared probe head, delay timer, buzzer and automatic dialer.

Description

A kind of family expenses fire precaution alarm unit

Technical field the present invention relates to a kind of family expenses fire alarm warning device, and it is applicable to Modern Family, is particularly useful for the kitchen of three-person household.

The technical background present case is: family heater has gas stove, coal gas stove and accessory, liquefied gas heating-water, electrical heating water heater, electric hot water bottle etc.; most of electric heater all has protective device, and this protective device mostly adopts power-off protection and do not have the early warning and alarming function.Yet gas furnace, as: gas stove, coal gas stove and accessory had not both had protective device at present; there is not the early warning and alarming device yet; particularly pipeline transportation combustion gas now for one family, is not left for a long time and is just caused fire probably if the user closes gas furnace.Another kind of family expenses fire alarm installation is can send alerting signal to each side when breaking out of fire, and has anti-theft alarm function again after increasing other device, and in a word, various warning devices are varied, and are of a great variety.But up to the present do not find as yet a kind of according to the fire alarm warning device of people in kitchen activity rule design, be not found to be yet the domestic gas stove and accessory in use under the situation of regulation at the give a warning device report of information of official hour.

Summary of the invention for provide to people a kind of can be before fire takes place, just can send information when having disaster hidden-trouble to exist in other words, reminds people takes measures to avoid fire to take place, and the present invention can prevent owing to forget the early warning and alarming device that cuts off fire that thermal source causes for the most ubiquitous present three-person household provides a kind of.

The present invention is achieved in that

When gas furnace was opened, probe was started working simultaneously, and when probe detection arrived human body, chronotron was not worked; Do not detect human body when popping one's head in, chronotron is started working, and still, chronotron does not drive acoustics in official hour.Arrive official hour, if probe does not detect human body, then chronotron drives acoustics, with the announcement of warning.If probe detects human body in official hour, then chronotron quits work and returns original state.If probe does not detect human body once more, chronotron is started working again, restarts timing.If thermal source is closed, then probe, chronotron quit work, and return original state.

The effect that the present invention is useful is the rule setting-up time near thermal source according to people, prevent that thermal source from working under no supervision, present specifically people stay at home in the kitchen activity process, if the gas furnace of lighting, no supervision just must be informed the user around it in continuous 8 minutes, and the present invention adopts buzzer call prompting people within doors.If the gas furnace of lighting is unmanned probably within doors with regard to the hidden danger and the explanation that necessarily have breaking out of fire at its no supervision on every side at continuous 18 minutes, at this moment the present invention adopts modern communication instrument such as phone to notify the setting people by autodialer.Therefore, the invention has the advantages that it is a kind of fire alarm warning device.

The present invention is further described below in conjunction with drawings and Examples for description of drawings:

Fig. 1 is the theory diagram of fire precaution alarm unit.

Fig. 2 is a fire precaution alarm unit autodialer software flow pattern.

Fig. 3 is a fire precaution alarm unit autodialer circuit diagram.

Among the figure: 1. thermal source, 2.A infrared probe, 3.A chronotron, 4. hummer, 5. autodialer, 6.B chronotron, 7.B infrared probe.

Embodiment in the drawings, when gas furnace is lighted, simultaneously, A infrared probe (2) and B infrared probe (7) are started working, when two probe detections during to human body, two chronotrons are not worked; When the people leaves, two probe detections are during less than human body, and two chronotrons are started working, and timing begins; When going into to return two probes when detecting human body again, two chronotrons quit work, and return original state; When continuous 8 minutes of A infrared probe (3) does not detect human body around gas furnace, at this moment A chronotron (3) is started working hummer (4), and hummer (4) sends and pipes, personnel in the notice room.When the people returns A infrared probe (2) when detecting human body again, A chronotron (3) quits work again, returns original state.When B infrared probe (7) did not detect human body at continuous 18 minutes, at this moment B chronotron (6) is started working autodialer (5) and by communication system (phone), is sent information to personnel that the user sets.When the personnel people who sets returns B infrared probe (7) when detecting human body again, B chronotron (6) quits work again, returns original state.

Should spell out the present invention can use a plurality of infrared probes or multistage chronotron to realize the multistage setting, but we are through actual observation for many years and discover, for present family, three-person household in the particularly present city, house person is in the rule of kitchen activity, set two time periods and carry out early warning and warning, best results.Setting-up time continuous 8 minutes and continuous 18 minutes then is the imbody of inherent law.

The present invention also can adopt other probe, but considers from practicality, and the embodiment of the invention adopts infrared probe, and infrared probe is to use photosensitive control, induction (also scalable) when light is strong.The people does not leave induction range and in activity, load (time) can continue to keep a kind of state.Automatic control product based on infrared technology, when the people enters induction range, sensor special detects the variation of human body infrared spectrum, but the automatic cutout load, as chronotron, the people does not leave and in activity, continue to disconnect, the people leaves the back and connects load (chronotron), connects another load automatically at official hour, as, hummer.Warm convenient, energy-saving safe.

Fig. 2 is the dialer software flow pattern, and master routine is finished the setting of writing of telephone number and CPU initial parameter; Interruption subroutine is finished the calling and the control of relay, controllable silicon action of detection, dialing subroutine of alarm signal.When program detects alarm signal, interruption subroutine will call the dialing subroutine three times every 30 seconds branches, disappear until alarm signal.Certainly, also can call the dialing subroutine repeatedly by revising software setting.

Fig. 3 is the autodialer circuit diagram, its core component IC1 is 89C51 or W78E51 single-chip microcomputer, 89C51 and W78E51 are low voltage cmos eight bit microprocessors of band 4K byte quickflashing PROM, and be compatible entirely with instruction, the pin of the MCS-51 series monolithic of standard.It has 4K byte quickflashing PROM, 128 byte RAM, 32 I/O ports, 2 16 bit timing device/counters, 6 interrupt sources.In 32 I/O mouths, P1, P3 can be used as common I/O mouth and use, and P0, P2 use as external data bus usually, and when using as common I/O mouth, the P0 mouth must outer add connecting resistance.IC2 (PCD3311) is the two audio-frequency generators of DTMF, can with the single chip microcomputer direct interface of all standards, receive the parallel or serial data of binary code, serial data format is the I2C bus mode.D0～D5 (8.～, 4. pin) is the parallel data input port, and MODE (3. pin) is the working mode selection port, and this port is connected into the high level mode in Fig. 3, is used to import parallel data.STR (5. pin) is the data strobe input end, by the P3.0 control of 89C51 or W78E51.TONE (6. pin) is a DTMF double-tone output terminal frequently.IC3 (93C46) is the bus-structured serial EEPROM of MICRO-WIRE, is used to preserve the telephone number of setting from the keyboard input, and outage back data can not lost.1.～4. pin of IC3 is respectively sheet choosing end (CS), serial-shift clock end (SK), serial-shift data input pin (DI) and serial-shift data output end (DO).According to the 6. height of pin level, 16 (6. pin meets VCC) and 8 (6. pin ground connection) two kinds of modes of operation are arranged.What the autodialer of codified adopted is 16 modes.P1.0～P1.5 of IC1 (1.～6. pin) is mainly used in the data-interface of PCD3311.The data strobe of P3.0 (10. pin) control PCD3311.P3.0～P3.5 (2., 3., 6.～9. pin) is used for the input of PCD3311 parallel data.P3.6 is used for pilot relay.P3.7 control optically-coupled bidirectional triode thyristor MOC3041 is to connect the 220V AC power.P3.1, P3.3, P3.4, P3.5 connect 93C46.P2 is as the input interface of keyboard.P0.7 is alarm signal input (judge the state of P0.7 automatically, promptly dial as becoming low level from high level).Dotted portion among Fig. 3 is the alarm detection circuit, principle of work is: when probe detects extraneous medium and changes, the surface resistance descends, homophase "+" end input voltage raises, comparer LM324 exports high level, becomes the P0.7 end that low level is delivered to CPU through inverter, and P3.6, P3.7 then become high level by low level, by pilot relay and controllable silicon, thereby connect outside line and 220V AC power.Meanwhile, CPU calls the telephone number that writes 93C46, and sends signal by PCD3311 to outside line.RL is the 220V supply socket, can or exchange alarm according to the external various drive units of different situations.K1 among Fig. 3 is a system reset pad, K2 is normally/switch (input of closure state lower keyboard is effectively) is set, and K3 is a conclusion button.Input pushes K2 " settings " position earlier during telephone number, treat that input is finished after, should click K3, again K2 is placed " normally ".For prevent mistake dialing (because of may be when the initial power-up surface resistance decline can causing erroneous judgement disconnected), during software programming, be added with 30 seconds time-delay in the program original state.By Fig. 3 connect errorless after, but the people is a low level for making P0.7, carefully regulates adjustable resistance R again, makes the phone function receive dialing signal exactly.

Claims (5)

1. family expenses fire alarm warning device, it comprises infrared probe, chronotron, hummer, autodialer, in accordance with regulations time is transmitted information when it is characterized in that thermal source is arranged.

2. according to the described family expenses fire alarm of claim 1 warning device, it is characterized in that thermal source is a gas furnace.

3. according to the described family expenses fire alarm of claim 1 warning device, the time that it is characterized in that first section of regulation is continuous 8 minutes.

4. according to the described family expenses fire alarm of claim 1 warning device, it is characterized in that second period of stipulating is continuous 18 minutes after.

5. according to the described family expenses fire alarm of claim 2 warning device, it is characterized in that the family kitchen gas furnace.

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