CN205121790U - Security against fire smoke signal treatment circuit - Google Patents
Security against fire smoke signal treatment circuit Download PDFInfo
- Publication number
- CN205121790U CN205121790U CN201520956388.2U CN201520956388U CN205121790U CN 205121790 U CN205121790 U CN 205121790U CN 201520956388 U CN201520956388 U CN 201520956388U CN 205121790 U CN205121790 U CN 205121790U
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- resistance
- amplifier
- electric capacity
- security against
- triode
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- Fire Alarms (AREA)
Abstract
The utility model discloses a security against fire smoke signal treatment circuit, including resistance R1, electric capacity C1, U2 is put to fortune and U3 is put to fortune, resistance R1 one end ground connection, the resistance R1 other end is connecting resistance R2 and triode VT1 base respectively, ground resistance R3 is connected to triode VT1 projecting pole, triode VT1 collecting electrode connection infrared diode D1 negative pole, infrared diode D1 positive pole connecting resistance R4, the resistance R4 other end connect the respectively VCC and the resistance R2 other end, it is anodal that photosensitive diode D2 is connected to electric capacity C1 one end, and ground resistance R5 is connected to the photosensitive diode D2 negative pole. The utility model discloses security against fire smoke signal treatment circuit adopts infrared diode and photosensitive diode to detect smoke signal, then handles the back to the signal, sends the controller again to after sending into outside AD converter, and circuit structure is simple, and is with low costs, small, life -span of can greatly increased using the alarm control ware of here circuit, has increased stability.
Description
Technical field
The utility model relates to a kind of signal processing circuit, specifically a kind of security against fire smoke signal treatment circuit.
Background technology
Specify according to existing security against fire, fire alarm system is the basic fire fighting device of buildings indispensability, and arranging fire alarm system can effectively prevent the generation of fire and spread, and plays the vital role of protection people life property safety.
Existing a lot of fire alarm system adopts smoke transducer as detecting element, cost is higher, and the signal transacting to detect smoke transducer is all very simple, general is all directly be sent in peripheral control unit by the detection signal of sensor, then the actions such as relevant warning are controlled by controller, the problem causing accuracy of detection lower on the one hand, also make system stability low on the other hand, serviceable life is short.
Utility model content
The purpose of this utility model is to provide a kind of security against fire smoke signal treatment circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of security against fire smoke signal treatment circuit, comprise resistance R1, electric capacity C1, amplifier U2 and amplifier U3, described resistance R1 one end ground connection, the resistance R1 other end is contact resistance R2 and triode VT1 base stage respectively, triode VT1 emitter connects stake resistance R3, triode VT1 collector connects infrared diode D1 negative pole, infrared diode D1 positive pole contact resistance R4, the resistance R4 other end connects power supply VCC and the resistance R2 other end respectively, described electric capacity C1 one end connects photodiode D2 positive pole, photodiode D2 negative pole connects stake resistance R5, the electric capacity C1 other end connects stake resistance R6 respectively, electric capacity C2 and amplifier U2 positive pole, amplifier U2 end of oppisite phase connects stake resistance R7 and resistance R8 respectively, the resistance R8 other end connects amplifier U2 output terminal and resistance R9 respectively, the resistance R9 other end connects stake resistance R10 and amplifier U3 positive pole respectively, amplifier U3 end of oppisite phase connects stake resistance R11 and resistance R12 respectively, the resistance R12 other end connects the electric capacity C2 other end and resistance R14 respectively, the resistance R14 other end connects stake resistance R13 and output end vo respectively.
As further program of the utility model: described power supply VCC voltage is 3.3V.
As the utility model further scheme: described amplifier U2 and amplifier U3 all adopts TLC27L2.
Compared with prior art, the beneficial effects of the utility model are: the utility model security against fire smoke signal treatment circuit adopts infrared diode and photodiode to detect smoke signal, then after signal being processed, controller is delivered to again after sending into outside A/D converter, circuit structure is simple, and cost is low, and volume is little, greatly can increase the life-span of the alarm controller using this circuit, add stability.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of security against fire smoke signal treatment circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of security against fire smoke signal treatment circuit, comprise resistance R1, electric capacity C1, amplifier U2 and amplifier U3, described resistance R1 one end ground connection, the resistance R1 other end is contact resistance R2 and triode VT1 base stage respectively, triode VT1 emitter connects stake resistance R3, triode VT1 collector connects infrared diode D1 negative pole, infrared diode D1 positive pole contact resistance R4, the resistance R4 other end connects power supply VCC and the resistance R2 other end respectively, described electric capacity C1 one end connects photodiode D2 positive pole, photodiode D2 negative pole connects stake resistance R5, the electric capacity C1 other end connects stake resistance R6 respectively, electric capacity C2 and amplifier U2 positive pole, amplifier U2 end of oppisite phase connects stake resistance R7 and resistance R8 respectively, the resistance R8 other end connects amplifier U2 output terminal and resistance R9 respectively, the resistance R9 other end connects stake resistance R10 and amplifier U3 positive pole respectively, amplifier U3 end of oppisite phase connects stake resistance R11 and resistance R12 respectively, the resistance R12 other end connects the electric capacity C2 other end and resistance R14 respectively, the resistance R14 other end connects stake resistance R13 and output end vo respectively, described power supply VCC voltage is 3.3V, described amplifier U2 and amplifier U3 all adopts TLC27L2.
Principle of work of the present utility model is: refer to Fig. 1, Smoke Detection adopts infrared diode and photodiode, and be arranged in darkroom, two pipes become obtuse angle to be in relative status, 3.3V D.C. regulated power supply is provided to circuit, circuit is started working at once, if do not have breaking out of fire dangerous situation (non smoke), infrared light can not arrive D2; When there is fire dangerous situation (having smog), infrared light enters D2 in the generation diffuse reflection of smoke particle surface and refraction, smog larger infrared light diffuse reflection and refraction stronger, the signal that D2 receives is stronger, the feeble signal that D2 receives is sent to outside LPC2200(Fig. 1 and does not draw after TLC27L2 two-stage is amplified) carry out A/D conversion after send into peripheral control unit, controller judges whether the alarm operation needing to carry out being correlated with by the size of A/D conversion value.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. a security against fire smoke signal treatment circuit, comprise resistance R1, electric capacity C1, amplifier U2 and amplifier U3, it is characterized in that, described resistance R1 one end ground connection, the resistance R1 other end is contact resistance R2 and triode VT1 base stage respectively, triode VT1 emitter connects stake resistance R3, triode VT1 collector connects infrared diode D1 negative pole, infrared diode D1 positive pole contact resistance R4, the resistance R4 other end connects power supply VCC and the resistance R2 other end respectively, described electric capacity C1 one end connects photodiode D2 positive pole, photodiode D2 negative pole connects stake resistance R5, the electric capacity C1 other end connects stake resistance R6 respectively, electric capacity C2 and amplifier U2 positive pole, amplifier U2 end of oppisite phase connects stake resistance R7 and resistance R8 respectively, the resistance R8 other end connects amplifier U2 output terminal and resistance R9 respectively, the resistance R9 other end connects stake resistance R10 and amplifier U3 positive pole respectively, amplifier U3 end of oppisite phase connects stake resistance R11 and resistance R12 respectively, the resistance R12 other end connects the electric capacity C2 other end and resistance R14 respectively, the resistance R14 other end connects stake resistance R13 and output end vo respectively.
2. security against fire smoke signal treatment circuit according to claim 1, is characterized in that, described power supply VCC voltage is 3.3V.
3. security against fire smoke signal treatment circuit according to claim 1, it is characterized in that, described amplifier U2 and amplifier U3 all adopts TLC27L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520956388.2U CN205121790U (en) | 2015-11-26 | 2015-11-26 | Security against fire smoke signal treatment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520956388.2U CN205121790U (en) | 2015-11-26 | 2015-11-26 | Security against fire smoke signal treatment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205121790U true CN205121790U (en) | 2016-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520956388.2U Expired - Fee Related CN205121790U (en) | 2015-11-26 | 2015-11-26 | Security against fire smoke signal treatment circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205121790U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825612A (en) * | 2016-05-13 | 2016-08-03 | 宁波钱湖创想智能科技有限公司 | Fire alarm system for freight vehicle |
| CN106453008A (en) * | 2016-11-20 | 2017-02-22 | 广西大学 | Electronic informatization home control system |
-
2015
- 2015-11-26 CN CN201520956388.2U patent/CN205121790U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825612A (en) * | 2016-05-13 | 2016-08-03 | 宁波钱湖创想智能科技有限公司 | Fire alarm system for freight vehicle |
| CN106453008A (en) * | 2016-11-20 | 2017-02-22 | 广西大学 | Electronic informatization home control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20161126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |