CN201281889Y - Networking fire alarm system - Google Patents
Networking fire alarm system Download PDFInfo
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- CN201281889Y CN201281889Y CNU2008203024262U CN200820302426U CN201281889Y CN 201281889 Y CN201281889 Y CN 201281889Y CN U2008203024262 U CNU2008203024262 U CN U2008203024262U CN 200820302426 U CN200820302426 U CN 200820302426U CN 201281889 Y CN201281889 Y CN 201281889Y
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Abstract
A fire alarm system capable of networking comprises monitoring stations and inductors connected with the monitoring stations. The monitoring stations and a host computer are linked through a network, and are connected through a bus RS-485 communication network; each monitoring station comprises singlechips which are used for realizing functions of cyclic acquisition of temperature data, processing, checking, storing and displaying of temperature data, and alarm searching and distinguishing; each singlechip is connected with a keyboard, a display interface circuit, a clock chip and an alarm circuit respectively; at least one I/O port of the singlechips is connected with an enable control terminal of a drive chip; an input and an output ports of the drive chip are connected with a single-wire bus; and at least one digital temperature inductor is articulated with the single-wire bus. The fire alarm system overcomes the defects that traditional fire forecasting systems have complex hardware circuits, high manufacturing cost, low forecast accuracy and the like, and solves the technical problems of real-time and accurate forecast of fire disaster, so that can be widely applied to fire forecast.
Description
Technical field
The utility model relates to a kind of fire alarm system.
Background technology
Fire is suddenly in tiger, and the generation of prevention and controlling fires is significant to development and national economy and people's lives and properties.Fire alarm system is to find incipient fire, prevents trouble before it happens, and in order to the protection lives and properties, safeguards the indispensable a kind of important device of Environmental security.Fire early detection is a comparatively complicated and significant problem.Greatest hope to fire alarm and automatic monitoring system is to eliminate rate of false alarm and rate of failing to report in the early stage condition of a fire of in time finding of fire generation.
Fire is the comprehensive phenomenon with cigarette, light, temperature rise, stray radiation and unusual odor.Tradition is mainly carried out temperature detection to the detection of fire, temperature detection generally adopts thermistor temperature sensor, use thermistor as temperature-sensing element (device), the thermistor major advantage is that cost is low, but the simulating signal of gathering needs follow-up signal processing circuit, must be by just obtaining the digital signal that system needs, circuit complexity like this after amplifier, wave filter, the A/D change-over circuit.In addition, the number of sensors that monitoring station can articulate is limited, and the frequency of temperature acquisition is slower.No matter be thermocouple sensor thermometric or thermal resistance sensor thermometric, what they were measured generally all is voltage, needs many external hardware supports, hardware circuit complexity, cost of manufacture height in converting corresponding temperature course to.For example for the collection of multi-point temp, the problem that faces is that the selection of point for measuring temperature is normally undertaken by multi-way switch, but under the many situations of point for measuring temperature, multi-way switch and channel selection circuit will increase the complicacy of system greatly.
The utility model content
But the purpose of this utility model provides a kind of fire alarm system of networking, solve tradition and adopt system for detecting temperature hardware circuit complexity, cost of manufacture height, the not high technical matters of forecast accuracy; And the problem of solution fire alarm system fire forecast accuracy promptness and convenience; Also solved the problem of transmitting with the long line of sensor in the monitoring station.
For achieving the above object, the utility model adopts following technical scheme:
But the fire alarm system of this networking comprises it is characterized in that monitoring station and the sensor that is attached thereto: network with host computer in above-mentioned monitoring station, is connected by bus-type RS-485 communication network between each monitoring station and the host computer; Each monitoring station comprises a single-chip microcomputer that is used to realize temperature data circle collection, temperature data processing, verification, storage and demonstration, warning search and discrimination function, each single-chip microcomputer connects keyboard and display interface circuit, clock chip and warning circuit respectively, at least one I/O mouth of single-chip microcomputer connects the control end that enables of chip for driving, the input/output port of chip for driving is connected with unibus, articulates at least one digital temperature sensor on the unibus.
Above-mentioned single-chip microcomputer can be the single-chip microcomputer of external serial storage, or the single-chip microcomputer of external parallel storage, or the single-chip microcomputer of self-contained storing devices.
Above-mentioned single-chip microcomputer can be connected with watchdog circuit.
The input port of the level end of above-mentioned chip for driving and delivery outlet end short circuit are as input/output port.
Principle of work of the present utility model: but the fire alarm system of networking reads field digital temperature sensor temperature value by serial communication on the unibus, reaches the purpose of monitoring site environment temperature.In order to detect the early stage phenomenon of fire accurately, reliably, when temperature raises and temperature value when exceeding the high alarm setting value, need correct reading number temperature sensor temperature value and report to the police automatically.Finishing of task is the monitoring point temperature of gather disperseing, judges whether temperature transfinites, centralized control and management are carried out in each monitoring point.
Major function of the present utility model and technique effect have following some:
1, adopts the digital temperature sensor that carries coding to form the multi-point temperature measurement system, have characteristics such as node is many, sample frequency is fast, temperature is accurate.Can directly read the temperature of measured point, just measured signal realized digitizing at check point, what transmit on unibus is digital signal.Saved multi-way switch and channel selection circuit, made temperature measurement module become more succinct, small and exquisite.The measurement range of temperature is 55 ℃～+ 125 ℃, and measuring accuracy is 0.5 ℃.Digital temperature sensor sense information or writing information only need a bus to link to each other with the single-chip processor i/o mouth, and by serial output mode and single chip communication.Realized gathering the multi-point temp data, and can carry out integer, decimal and positive negative judgment processing the temperature value of gathering with novel unibus serial temperature sensor.Realized the multimode of sensor sequence number is correctly read, and finished temperature data and read, and reading of data has been carried out CRC check.The multi-point temperature measurement system stability of forming with digital temperature sensor is good, the reliability height, and construction costs is low.Digital temperature sensor has made full use of the unibus special advantages, can set up sensor network apace, makes system design flexible more and convenient.
2, the utility model can be written to digital temperature sensor with high alarm setting, and has realized the power down preservation value of setting function by duplicating the scrachpad storage order, can be by on the rapid judgment data line of search ROM mode alarm free being arranged.When on finding line, warning being arranged, can be by relatively finding out concrete warning room number, and send warning by acoustooptic form, simultaneously also will be in the storer of local monitoring station store alarms information, in order to inquiry.
3, the utility model can be realized watchdog function.Can realize utilizing serial chip to carry out functions such as clock demonstration.Can realize data access, also can realize byte and multibyte read-write operation, solve the problem that the ACK confirmation signal is made mistakes easily serial storage.
4, monitor supervisor of the present utility model can by keyboard utilize liquid crystal display realize menu call, time be provided with, the inserting of high alarm setting value, temperature patrol inspection and page turning demonstration, system initialization, the fixed inspection inquire about that the current time shows and multinomial functions such as historical warning message inquiry.
5, the utility model adopts power control configuration software as host computer management station supervisory system, has designed the driver of single chip circuit and power control configuration software, adopts configuration software to finish the real-time demonstration of fire alarm system temperature and warning.Realized the data communication between host computer management station and the local monitoring station.Realize that host computer management station sends order and down-transmitting data to local monitoring station, realized that local monitoring station uploads sample temperature and sampling time, uploads the higher limit of each sensor etc. to host computer management station.
6, fire detecting system of the present utility model all designs based on serial chip, carry out a plurality of I/O mouths based on single-chip microcomputer and articulate a plurality of sensors, integrate digital temperature-sensitive sensor technology, microelectric technique, alarm technique and observation and control technology, has the resolution height, highly sensitive, good stability, security of system is reliable, convenient operating maintenance, volume are little, the characteristics that cost performance is high.
7, the utility model has designed the long line transmission circuit of single-chip microcomputer and sensor, and has verified well that by experiment its practicality, the transmission range of sensor can reach rice up to a hundred, make the fire alarm system of design have practicality.Solve the difficult point problem of the long line transmission of monitoring station and sensor, can remedy the some shortcomings part of smoke alarm in the market.
To sum up, but the utility model adopts the distributed fire alarm system of networking, guarded region is divided into a plurality of independent subsystem, if malfunctioning other monitoring station, certain local monitoring station also can work on.The utility model utilizes digital temperature sensor to measure temperature, when environment temperature exceeds high alarm setting, show and carry out sound and light alarm with liquid crystal display, also temperature and warning message can be sent to host computer management station manages and monitors, use the driver of single chip circuit and power control configuration software, adopt configuration software to finish the real-time demonstration of fire alarm system temperature and warning.Realized the data communication between host computer management station and the local monitoring station.The utility model has overcome conventional fire forecast system hardware circuit complexity, and cost of manufacture height, the not high shortcoming of forecast accuracy have solved the technical matters that fire forecast accurately forecasts in real time.The early prediction that can be widely used in fire.
Description of drawings
The utility model is described in more detail below in conjunction with accompanying drawing.
Fig. 1 is that the utility model system forms synoptic diagram.
Fig. 2 is each monitoring station main program flow chart.
Fig. 3 is digital temperature sensor temperature acquisition and processing flow chart.
Fig. 4 is host computer and monitoring station communication flow diagram.
Embodiment
Embodiment is referring to shown in Figure 1, but its system's formation of the fire alarm system of this networking is to adopt host computer management station and a plurality of local monitoring stations mode, and its tie line adopts the RS-485 bus.Be connected by bus-type RS-485 communication network between the networking of above-mentioned monitoring station and host computer, each monitoring station and host computer; Each monitoring station comprises a single-chip microcomputer STC89C516RD who is used to realize temperature data circle collection, temperature data processing, verification, storage and demonstration, warning search and discrimination function, above-mentioned single-chip microcomputer can be the single-chip microcomputer of external serial storage, or the single-chip microcomputer of external parallel storage, or the single-chip microcomputer of self-contained storing devices.Above-mentioned single-chip microcomputer can be connected with watchdog circuit.Each single-chip microcomputer STC89C516RD connects keyboard and LCD LCD interface circuit, clock chip and warning circuit respectively, at least one I/O mouth of single-chip microcomputer connects the control end that enables of chip for driving, the input/output port of chip for driving is connected with unibus, articulates at least one digital temperature sensor DS18B20 on the unibus.
Referring to Fig. 2, the monitoring station main program flow is as follows:
After the beginning, carry out initialization, adopt the 0th group of work register, whether inquiry changes the P1.0 mouth upper limit, in this way, and change upper limit program; If not, whether inquiry changes the P1.1 mouth upper limit, and as not, two mouthfuls of start-up temperature conversions simultaneously are provided with temperature and alarm condition memory block, reads when time temperature sampling time and preserves, and a mouthful parameter is set, and single port Temperature Treatment subroutine is provided with mouthful 2 parameters, enters subroutine A.
After entering single port Temperature Treatment subroutine, whether change temperature and alarm condition memory block selection marker inquire update displayed in this way, to enter the temperature display subroutine whether inquiry has warning, in this way, alarm equipment alarm, if not, then whether inquiry has warning once more.
Referring to Fig. 3, digital temperature sensor temperature acquisition and treatment scheme are as follows:
After the beginning, carry out the initialization sequential, send and skip the order of ROM coupling, the start-up temperature conversion, time-delay 750ms waiting temperature converts, and carries out the initialization sequential, sends coupling ROM order, enters program 1.
Local monitoring station links to each other with 1-wire digital temperature sensor DS18B20, finishes initialization, the collection to the each point temperature, data storage to each sensor, and the data communication that realizes monitoring station and host computer management station.Another critical function of monitoring station is man-machine interface, and it will be finished simple information and shows and the operational order input, and the operator can realize control to our station by it.1-wire digital temperature sensor DS18B20 can be directly changed into digital signal to temperature signal, and every DS18B20 contains 64 unique bit sequence number.Because the monitoring station is far away with the sensor transmissions distance in the fire alarm system, will the be interfered influence of factor of the signal that is transmitted can cause error code to make the data consequently blocking communication that makes a mistake when serious.Therefore, transmission temperature data in zero defect ground adopts the CRC method in order to guarantee efficient, is called for short the CRC check method, the collecting temperature data is carried out verification, i.e. Error Control.
The utility model utilizes single-chip microcomputer to carry out a plurality of I/O mouths and articulates a plurality of sensors, because DS18B20 is the unibus chip, when single-chip microcomputer is connected with the sensing data line, only needs port of single-chip microcomputer such as P1.0 or P1.1 to link to each other with data line.In system design, sensor place P1 mouth has also connected some other devices except having connected the two-way sensor, therefore when software programming, bit manipulation has all been adopted in the control of sensor, in order to avoid other chip that is articulated on the P1 mouth is produced interference.
Because the ram in slice of single-chip microcomputer is limited, and do not possess the ability of the follow-up continuation of insurance deposit data of power down, therefore need external memorizer E
2PROM finishes the storage of data.External memorizer E
2PROM can be divided into parallel according to the mode that reads and writes data and two kinds of serials.Parallel E
2PROM is than Serial E
2PROM has advantages such as read or write speed is fast, program is simple, but the I/O mouth line that takies CPU is more, cost is high.And Serial E
2The I/O mouth line that PROM takies CPU is few, cost is low, wiring is simple, but speed is relatively slow, and the program complexity.The characteristics that present embodiment is few according to the CPU idle port have been selected Serial E
2PROM chip 24C256, it has the 32K space and realizes data storage.
For warning message being provided accurately and learning the temperature trend of monitoring point, need know the sampling time of each temperature value, need a clock chip and write down each sampling time.System design adopted the DS1302 clock chip, it have to second, branch, the time, day, week, the moon and leap year compensation ability, it can also automatically switch to standby power supply or powered battery under the situation of primary power power down, and only need be connected with CPU, save CPU pin resource greatly with 3 pins.
Warning function is the critical function of fire alarm system, and the quality of warning function directly affects the performance quality of system.System design has the requirement of warning function: can identification quickly and accurately report to the police in a large amount of points for measuring temperature, alarm temperature and place of alarm and time of fire alarming can be stored, can report to the police in multiple modes such as acousto-optics, these functions have related to sensor, E
2Aspects such as PROM, real-time timepiece chip and special-purpose warning circuit.And when satisfying all these functions, also requirement can not influence the work of other various functions of system and the sample rate of temperature.
The keyboard of system and display monitoring management main contents have keyboard input and screen display, and it belongs to the man-machine interface of local monitoring station.Because keyboard is more with the function that show to need realizes, it is also many to relate to chip, in the realization of function, need many-side is coordinated.Simultaneously when programming, also to carry out keyboard shielding work, when the program that prevents is being carried out some function treatment interfaces, cause system mistake because of mistake touches the button.In addition, because master routine based on temperature acquisition, is promptly mainly operated DS18B20, but DS18B20 has strict sequential requirement, if directly return after the End of Interrupt, may cause temperature to read to make mistakes situation such as maybe can't read, therefore must resolve and interrupt returning problem.
Fire alarm system be unable to do without warning function, can be accurately, report to the police timely, and be one of important factor of weighing fire alarm system performance quality.Adopt the warning function of search of temperature sensor DS18B20, single-chip microcomputer does not need each temperature data is compared one by one.The temperature alarming zone bit of DS18B20 all can upgrade after each temperature transition is finished, so single-chip microcomputer only needs behind each EOC data line inquired and know that promptly alarm free is arranged on this line, if alarm free then can save the program of reporting to the police and handling.
In order to alleviate the burden of single-chip microcomputer, before temperature being carried out one by one relatively, single-chip microcomputer will have or not alarm decision to data line, has then and compares, and does not have and then skips.But the search alarm command is the sequence number that is used for reading the All Alerts sensor, if each judgement all will run through one 64 sequence number, with the expensive time.By analysis, if warning is arranged on the line, when and then reading one so after single-chip microcomputer sends the search alarm command, each alarm sensor all can return the lowest order of their sequence numbers.Wherein the lowest byte of DS18B20 is family's sign indicating number " 28H ", the lowest order of " 28H ", just the lowest order of whole sequence number is " 0 ", promptly alarm sensor all can return " 0 " simultaneously after receiving the search alarm command, and under alarm-free situation, the data line of this moment should be " 1 ".That is to say, just can judge that alarm free is arranged on the line as long as read one, do not need to run through 64 with search ROM method, this will save a lot of read-write cycles.
Because the DS18B20 sensor has very strict sequential requirement, it has stipulated the duration of every section high-low level, and to the error requirements of sequential all within several microseconds, so require single-chip microcomputer that data line is had powerful control ability.But it is longer to work as the data line that connects sensor, perhaps the number of sensors that articulates on the data line more for a long time, because increasing, the total equivalent capacity of data line make single-chip microcomputer when control data line level, the rise time or the fall time of data line level are elongated, this makes sequential control become and is difficult to satisfy that this is a difficult point of design.The utility model shows by long line experiment, because the driving force of single-chip microcomputer and DS18B20 chip is too low, is articulating under the situation of two sensors on the data lines, if do not add any measure, when data line increased, main equipment can't be communicated by letter with DS18B20.The utility model is selected the MAX-487 chip for driving of using for use in RS-485 communication, increase the chip drives ability.Single-chip microcomputer and DS18B20 communicate by unibus, and the transmission of MAX-487 chip for driving realizes by two pins respectively with receiving, and are in transmit status or accepting state enables the control line decision by one.So use MAX-487 as chip for driving, must at first solve how to allow a line system and two-wire system phase transformation.Proved that through debugging the MAX-487 chip is in high-impedance state in the input port of Transistor-Transistor Logic level end under the transmission data conditions, and delivery outlet is in high-impedance state under the reception data conditions.Therefore, realize the mutual conversion of a line system and two-wire system, only need the input port of the Transistor-Transistor Logic level end of chip for driving MAX487 and delivery outlet end short circuit as input/output port, and the I/O mouth such as the P1.2 mouth that will enable control end and single-chip microcomputer join, get final product in order to the transmission direction of control data.
Owing to need change into the RS-485 standard signal that is suitable for teletransmission to signal, so need adopting chip for driving MAX487 to finish corresponding level, fire alarm system transforms, finish the data communication of monitoring station and host computer management station.Data transmission mainly is subjected to the control of chip for driving MAX487 read-write, when single-chip microcomputer sends data by serial ports, need be changed to the transmission data mode to the state of chip for driving MAX487; Otherwise, then be in the reception data mode.
Host computer management station has adopted power control configuration software, and it has formulated specific communication protocol to various device, and messaging parameter comprises data bit, position of rest, baud rate and verification mode.What wherein data bit, position of rest, baud rate will be with program settings in the monitoring station is consistent.In power control configuration software, must carry out configuration to equipment.Relevant parameters can be set, and wherein the cycle of Geng Xining, overtime time and the address of equipment all are related to the data layout that the power control sends message.Communication mode is selected serial ports, clicks Advanced Options then, enters the setting of advanced configuration unit.Be set, the number of times of packet collection failure back retry, and the number of times of data item underlying failure the device scan cycle.Point was preserved after setting was finished, Returning equipment configuration window.Proceed equipment disposition.Select the serial ports of use, click then button is set, the correlation parameter of serial ports is set, the baud rate of selection serial ports, verification mode etc., these settings are corresponding with software programming.Set the back and click preservation, the Returning equipment allocation window is clicked " finishing " button then, finishes the configuration of equipment.Then carry out the data configuration, the purpose of data configuration is that the offset address of each data is distributed.
Configuration method is a double-click power control data configuration option, enters the data configuration picture, has wherein divided many zones, is used to distinguish different modules.Selected area 00 in design for use, the point selection Simulation with I of configuration/O point is double-clicked and is entered the configuration window.Need the point of configuration be named.Name is got the back click data and is connected, and enters data and connects window.Because when device configuration, having defined name is the I/O equipment of mcu, so choice of equipment mcu carries out configuration to instantaneous value PV, the lower bound alarming value LO of this point, high limit alarming value HI respectively then.
Host computer can be according to the time circulation transmission power control read data command format of setting in device configuration, the data type that defines when wherein data type is the data configuration, data address is the offset address of first data that will read, what the data number defined during for configuration counts, when the correct data format that power control configuration software sends is received in the monitoring station by serial ports after, the monitoring station sends corresponding read data format command to power control configuration software, has comprised the data that the monitoring station will be transmitted in this command format.Power control configuration software is according to the offset address of data, and the data storage that receives to the corresponding address space, is so just finished a data transfer.
After in the interface of power control configuration software, changing certain data, power control configuration software can send the write data command format, the data that the power control will be write in this frame data format, have been comprised, when the monitoring station correctly receives these frame data, and after therefrom taking out data, the write data form is replied in transmission, finishes the operation of a write data.
The particular flow sheet of host computer and monitoring station communication is shown in 4: after the beginning, does inquiry allow to communicate by letter with host computer management station? in this way, receive start-of-message code, does inquiry equal initial code? in this way, the receiving equipment address code, does inquiry equal device address code? in this way, receive the read-write byte, whether inquiry position " reading "?
In this way, then receive data type, receive data address, receive the data number, receive end-of-message code, receive and check bit, whether the inquiry verification correct? in this way, the civilian initial code of then transmitting messages is sent out the data type byte, sends and check code, sends out ODH, OAH, finishes;
As not, then receive data type, receive data address, the data that reception need write, receive end-of-message code, receive and check bit, whether the inquiry verification correct? in this way, the civilian initial code of then transmitting messages, send the end code zone bit, send end-of-message code, send and check code, send out ODH, OAH, finish; If not, then return, receive start-of-message code again.
The agreement of communicating by letter with host computer management station in the monitoring station will be write in strict accordance with the agreement of power control transmission data, comprises read data message format and write data message format.
The supervisory system of monitoring station can realize showing the current time, time value is set, high alarm setting is set, decides to check and ask, check warning message, temperature patrol inspection etc.By " menu " option, then enter menu screen by keyboard.
After system powered on, can circulate on the liquid crystal display showed the temperature value in room, and when the temperature in certain room was higher than the upper limit alarm setting value or is lower than the lower limit alarm setting value, alarm lamp can be lighted, and hummer produces and reports to the police simultaneously.By behind " warnings " key, will show that " affirmation of reporting to the police " close hummer simultaneously by keyboard on the liquid crystal, if but temperature can not be recovered normal value, and hummer has just been turned off in alarm parameters display alarm still on the warning picture.
The alarm history data presentation is to access to be stored in storer E
2Alert data among the PROM, and the data of reading are shown on the liquid crystal device.The alert data in corresponding each room divides two screens to show, the temperature when parameter comprises the corresponding room number of warning generation, time of fire alarming, warning, upper limit alarm setting value, lower limit alarm setting value, warning mark etc.
Claims (4)
- [claim 1] but a kind of fire alarm system of networking comprise it is characterized in that monitoring station and the sensor that is attached thereto: networking with host computer in above-mentioned monitoring station, is connected by bus-type RS-485 communication network between each monitoring station and the host computer; Each monitoring station comprises a single-chip microcomputer that is used to realize temperature data circle collection, temperature data processing, verification, storage and demonstration, warning search and discrimination function, each single-chip microcomputer connects keyboard and display interface circuit, clock chip and warning circuit respectively, at least one I/O mouth of single-chip microcomputer connects the control end that enables of chip for driving, the input/output port of chip for driving is connected with unibus, articulates at least one digital temperature sensor on the unibus.
- [claim 2] but the fire alarm system of networking according to claim 1 it is characterized in that: above-mentioned single-chip microcomputer is the single-chip microcomputer of external serial storage, or the single-chip microcomputer of external parallel storage, or the single-chip microcomputer of self-contained storing devices.
- [claim 3] but the fire alarm system of networking according to claim 1 it is characterized in that: above-mentioned single-chip microcomputer is connected with watchdog circuit.
- [claim 4] but the fire alarm system of networking according to claim 1 it is characterized in that: the input port of the level end of above-mentioned chip for driving and delivery outlet end short circuit are as input/output port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203024262U CN201281889Y (en) | 2008-10-15 | 2008-10-15 | Networking fire alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203024262U CN201281889Y (en) | 2008-10-15 | 2008-10-15 | Networking fire alarm system |
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| Publication Number | Publication Date |
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| CN201281889Y true CN201281889Y (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008203024262U Expired - Fee Related CN201281889Y (en) | 2008-10-15 | 2008-10-15 | Networking fire alarm system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102314744A (en) * | 2011-08-26 | 2012-01-11 | 无锡蓝天电子有限公司 | Fire alarm controller |
| CN103017921A (en) * | 2012-10-24 | 2013-04-03 | 北京信息科技大学 | Networked multipoint temperature monitoring system and method for performing data communication between upper computer and same |
| CN107042835A (en) * | 2017-03-27 | 2017-08-15 | 杭州电子科技大学 | Locomotive axle temperature detects warning device circuit |
| CN109243132A (en) * | 2018-11-30 | 2019-01-18 | 江苏中实电子有限公司 | A kind of fire-extinguishing apparatus automatic temperature-sensed starter and method |
| CN118018067A (en) * | 2024-04-08 | 2024-05-10 | 北京宏大京电电子技术有限公司 | One-wire system interface system and method, intelligent alarm system and method |
-
2008
- 2008-10-15 CN CNU2008203024262U patent/CN201281889Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102314744A (en) * | 2011-08-26 | 2012-01-11 | 无锡蓝天电子有限公司 | Fire alarm controller |
| CN103017921A (en) * | 2012-10-24 | 2013-04-03 | 北京信息科技大学 | Networked multipoint temperature monitoring system and method for performing data communication between upper computer and same |
| CN107042835A (en) * | 2017-03-27 | 2017-08-15 | 杭州电子科技大学 | Locomotive axle temperature detects warning device circuit |
| CN109243132A (en) * | 2018-11-30 | 2019-01-18 | 江苏中实电子有限公司 | A kind of fire-extinguishing apparatus automatic temperature-sensed starter and method |
| CN118018067A (en) * | 2024-04-08 | 2024-05-10 | 北京宏大京电电子技术有限公司 | One-wire system interface system and method, intelligent alarm system and method |
| CN118018067B (en) * | 2024-04-08 | 2024-06-11 | 北京宏大京电电子技术有限公司 | One-wire system interface system and method, intelligent alarm system and method |
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