CN2417510Y - Composite fire detector - Google Patents
Composite fire detector Download PDFInfo
- Publication number
- CN2417510Y CN2417510Y CN 00219789 CN00219789U CN2417510Y CN 2417510 Y CN2417510 Y CN 2417510Y CN 00219789 CN00219789 CN 00219789 CN 00219789 U CN00219789 U CN 00219789U CN 2417510 Y CN2417510 Y CN 2417510Y
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- China
- Prior art keywords
- carbon monoxide
- microprocessor
- sensing circuit
- fire detector
- port
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- Expired - Fee Related
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- Fire Alarms (AREA)
Abstract
The utility model discloses a composite fire detector, the casing of which is provided with a smoke sensing element connected to a smoke sensing circuit. The smoke sensing circuit is connected in an alarm circuit using a microprocessor as the kernel. In addition, the interior of the casing is also provided with a carbon monoxide sensor connected to the corresponding sensing circuit. The signal output terminal of a carbon monoxide sensing circuit is connected with the corresponding signal input port of the microprocessor, and the control terminal of the carbon monoxide sensor is connected to the output control port of the microprocessor. The composite fire detector of the utility model can eliminate the false alarm caused by the interference factors of dust, water vapor, etc., and detects the fire earlier. The utility model has the advantages of simple and compact structure and low cost, and after coming into the market, the utility model is welcomed by the wide national people enhancing the safe consciousness increasingly.
Description
The utility model relates to a kind of fire detecting arrangement, and especially a kind of fire detector that sensing element is combined with each other belongs to fire-fighting Detection Techniques field.
At present, known composite type fire detector mostly is sense cigarette and temperature inductive combined or dissimilar sense cigarette complex form.Complex detector is sensitiveer more reliable than single sensitive element smoke detector.Yet in use, still there is a common problem in these existing complex detectors, and promptly dust and water vapour etc. all might disturb the detection of sense cigarette element, cause false alarm.
The purpose of this utility model is: at the problem that above-mentioned existing combined fire detector exists, propose a kind ofly can reduce false alarm and the sensitiveer reliable combined fire detector that is caused by interference sources such as dust and water vapours.
In order to achieve the above object, the technical scheme of the utility model combined fire detector is as follows: the quick sensing element of cigarette is housed in the probe body, the quick sensing element of described cigarette is connected in the quick sensing circuit of cigarette, it is in the warning circuit of core that the quick sensing circuit of described cigarette is connected with the microprocessor, in addition, carbon monoxide transducer also is housed in the enclosure, described carbon monoxide transducer is connected in the carbon monoxide sensing circuit, the signal output part of described carbon monoxide sensing circuit is connected with the corresponding signal input port of described microprocessor, and the control end of described carbon monoxide transducer is connected to the output control terminal mouth of described microprocessor.
When combined fire detector of the present utility model was worked, the signal of all sensing elements was all delivered to the signal port of microprocessor.Microprocessor is controlled the work of each sensing element, and its signal is analyzed and handled, and provides the judgement whether fire exists at last.
In the still inchoate combustion stage just of fire, because burning is very insufficient, a lot of materials all can discharge CO gas, and CO gas occurs much more early than smog, its proportion lta, thereby be diffused into the fire detector position easily.On the other hand, such as interference sources such as dust, water vapour carbon elements not itself, CO gas sensor can their existence of perception.Therefore the combined fire detector that includes the CO gas sensing element is sensitiveer more reliable than existing combined fire detector, and rate of false alarm is low.Can estimate, after the utility model listing, will be subjected to the numerous its people's that awareness of safety strengthens day by day welcome.
Below in conjunction with accompanying drawing the technical solution of the utility model is described further.
Fig. 1 is the structural representation of an embodiment of the utility model.
Fig. 2 is the circuit diagram of Fig. 1 embodiment.
Figure 1 shows that a kind of three combined fire detectors, include three sensors in its shell 5, the i.e. photoelectric smoke sensor of forming by photoelectric device 1, labyrinth 4 and labyrinth seat 6, semiconductor temperature-sensitive sensor 2 and carbon monoxide transducer 3, the printed board 7 that microprocessor and other electron component are housed in addition in addition.
The physical circuit of this embodiment constitutes and annexation is seen Fig. 2, this circuit is by the quick sensing circuit A of cigarette, temperature sensitive sensing circuit B, carbon monoxide sensing circuit C, and be that the warning circuit of core constitutes with microprocessor up, the model of microprocessor chip is PIC16C72.
Wherein the quick sensing circuit A of cigarette is by infraluminescence pipe B2, the infrared receiving tube B1, amplifier N2, the switching tube V3 that are positioned at the optical dark room that labyrinth and labyrinth base form, and amplifier N2 feedback resistance R4 and R5, photosignal sampling resistor R6, switching tube V3 base stage controlling resistance R7, infraluminescence pipe B2 current-limiting resistance R8 form.The control port P5 of microprocessor connects the base stage of the switching tube V3 of control infraluminescence pipe B2.Form scattering after the pulsed light that infraluminescence pipe B2 sends shines smoke particle, scattered light is received by infrared receiving tube B1, forms signal voltage on sampling resistor R6, after amplifier N2 amplifies, delivers to microprocessor up signal port P4 and carries out analyzing and processing.
Temperature sensitive sensing circuit B is made up of temp .-sensitive diodes B3, amplifier N1, temp .-sensitive diodes supplying resistance R11 and amplifier feedback resistance R9, R10.Voltage drop on the temp .-sensitive diodes B3 and temperature are fixing funtcional relationship, deliver to microprocessor up signal port P6 and handle after N1 amplifies.
Carbon monoxide sensing circuit C allows switching tube V2 and sampling resistor R3 to constitute by carbon monoxide transducer cos (being the carbon monoxide transducer 3 among Fig. 1), heating gauge tap pipe V1, signal output, wherein each port of carbon monoxide transducer picks out to close and is: signal output part (3 pin) meets the signal port P1 of microprocessor up, and connects+the 5V power supply through sampling resistor R3; Fire end (4 pin) connects+the 5v power supply; Heating control end (1 pin) connects the collector of heating gauge tap pipe V1, and the base stage of this gauge tap pipe V1 meets the control port P2 of microprocessor up through base resistance R1; Signal output allows end (2 pin) to connect the collector that signal output allows switching tube V2, and this output allows the base stage of switching tube V2 to meet the control end P3 of microprocessor up through base resistance R2.
When airborne carbonomonoxide concentration increased, impedance descended between 2 pin of carbon monoxide transducer cos and 3 pin, caused that 3 pin voltages descend.As a result, the P1 mouth of microprocessor up is finished warning after treatment by sampling resistor R3 input signal.According to the erecting stage actual needs, microprocessor can electronic temperature sensing sensor 2, photoelectric smoke sensor 1 and carbon monoxide transducer 3 signals of combined fire detector be carried out " with ", " or " etc. the processing of multiple array mode.For example, when photoelectric smoke sensor 1 and carbon monoxide transducer 3 be " with " concern the time, when having only the two all to reach preset range, fire detector just sends alerting signal, thereby can eliminate owing to dust, water vapour equal the false alarm that the factor of disturbing causes, realize simultaneously more early reporting to the police.Three combined fire detectors that experiment showed, present embodiment are simple and compact for structure, and cost of manufacture is low, and dependable performance is applied widely.
Claims (3)
1. combined fire detector, the quick sensing element of cigarette is housed in the probe body, the quick sensing element of described cigarette is connected in the quick sensing circuit of cigarette, it is in the warning circuit of core that the quick sensing circuit of described cigarette is connected with the microprocessor, it is characterized in that: carbon monoxide transducer also is housed in the enclosure, described carbon monoxide transducer is connected in the carbon monoxide sensing circuit, the signal output part of described carbon monoxide sensing circuit is connected with the corresponding signal port of described microprocessor, and the control end of described carbon monoxide transducer is connected to the control port of described microprocessor.
2. combined fire detector according to claim 1, it is characterized in that: the photoelectric smoke sensor of being made up of photoelectric device, labyrinth and labyrinth seat is housed in the described shell, semiconductor temperature-sensitive sensor and carbon monoxide transducer, the printed board that microprocessor and other electron component are housed in addition in addition.
3. combined fire detector according to claim 1, it is characterized in that: described carbon monoxide sensing circuit mainly allows switching tube and sampling resistor to constitute by carbon monoxide transducer, heating gauge tap pipe, signal output, wherein each port of carbon monoxide transducer picks out to close and is: signal output part connects the signal input port of microprocessor, and connects power supply through sampling resistor; The heating termination power; The collector of heating control termination heating gauge tap pipe, the base stage of this gauge tap pipe connects the control port of microprocessor; Signal output allows the output of termination signal to allow the collector of switching tube, and this output allows the base stage of switching tube to connect the control end of microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219789 CN2417510Y (en) | 2000-03-27 | 2000-03-27 | Composite fire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219789 CN2417510Y (en) | 2000-03-27 | 2000-03-27 | Composite fire detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2417510Y true CN2417510Y (en) | 2001-01-31 |
Family
ID=33584936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00219789 Expired - Fee Related CN2417510Y (en) | 2000-03-27 | 2000-03-27 | Composite fire detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2417510Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776452A (en) * | 2014-01-13 | 2014-05-07 | 华中科技大学 | Personnel characteristic-based fire evacuation path navigation method |
| CN104200604A (en) * | 2014-09-12 | 2014-12-10 | 蔡光泉 | Cotton safety gas data acquisition unit |
| CN112017389A (en) * | 2020-09-14 | 2020-12-01 | 杭州海康消防科技有限公司 | Fire detector and fire detection method |
-
2000
- 2000-03-27 CN CN 00219789 patent/CN2417510Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776452A (en) * | 2014-01-13 | 2014-05-07 | 华中科技大学 | Personnel characteristic-based fire evacuation path navigation method |
| CN104200604A (en) * | 2014-09-12 | 2014-12-10 | 蔡光泉 | Cotton safety gas data acquisition unit |
| CN112017389A (en) * | 2020-09-14 | 2020-12-01 | 杭州海康消防科技有限公司 | Fire detector and fire detection method |
| CN112017389B (en) * | 2020-09-14 | 2022-08-09 | 杭州海康消防科技有限公司 | Fire detector and fire detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: DOU ZHENG TO: HUAZHONG SCIENCE + TECH. UNIV. |
|
| CP03 | Change of name, title or address |
Address after: 430073 Yu Jia Shan, Wuhan, Wuchang Patentee after: Huazhong University of Science and Technology Address before: No. 100 Liu Ying, Nanjing Co-patentee before: Wang Shu Patentee before: Dou Zheng |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |