CN105354995A - CO detection module applied to fire-fighting safety - Google Patents
CO detection module applied to fire-fighting safety Download PDFInfo
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- CN105354995A CN105354995A CN201510837271.7A CN201510837271A CN105354995A CN 105354995 A CN105354995 A CN 105354995A CN 201510837271 A CN201510837271 A CN 201510837271A CN 105354995 A CN105354995 A CN 105354995A
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- resistance
- amplifier
- sensor
- detection module
- effect transistor
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
The invention discloses a CO detection module applied to fire-fighting safety. The CO detection module comprises a CO sensor U1, a resistor R1, a capacitor C1, a field effect transistor VS, an operation amplifier U3, and an operation amplifier U2, a pin C of the CO sensor U1 is connected with the capacitor C1 and an output terminal of the operation amplifier U3, a pin R of the CO sensor U1 is connected with a D electrode of the field effect transistor VS and a resistor R5, the other terminal of the resistor R5 is connected with the other terminal of the capacitor C1 and a resistor R6, the other terminal of the resistor R6 is connected with an inverting terminal of the operation amplifier U3, a non-inverting terminal of the operation amplifier U3 is connected with a grounding resistor R7, an S electrode of the field effect transistor VS is connected with a pin W of the CO sensor U1 and a resistor R4, and a G electrode of the field effect transistor VS is connected with a power supply VCC via a resistor R3. According to the CO detection module applied to the fire-fighting safety, signals detected by the CO sensor can be processed and sent to a controller, the circuit structure is simple, the cost is low, the size is small, the service lifetime of the alarm controller can be greatly extended by employing the module, and the stability is improved.
Description
Technical field
The present invention relates to a kind of CO detection module, specifically a kind of CO detection module being applied to security against fire.
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.
And in the family, coal gas uses very general, and containing a large amount of carbon monoxide in coal gas, once gas leak, be very easy to blasting property fire.
CO alarm is all equipped with in existing a lot of home-use security against fire alarm, but most CO alarm is all very simple for the process of CO detection signal, directly the detection signal of sensor is sent in 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.
Summary of the invention
The object of the present invention is to provide a kind of CO detection module being applied to security against fire, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of CO detection module being applied to security against fire, comprise CO sensor U1, resistance R1, electric capacity C1, field effect transistor VS, amplifier U3 and amplifier U2, CO sensor U1 pin C connects electric capacity C1 and amplifier U3 output terminal respectively, the D pole of CO sensor U1 pin R difference contact resistance R5 and field effect transistor VS and resistance R5, the resistance R5 other end connects the electric capacity C1 other end and resistance R6 respectively, the resistance R6 other end connects amplifier U3 end of oppisite phase, amplifier U3 in-phase end connects stake resistance R7, the S pole of described field effect transistor VS connects CO sensor U1 pin W and resistance R4 respectively, the G pole of field effect transistor VS connects power supply VCC by resistance R3, the resistance R4 other end is contact resistance R1 respectively, electric capacity C2 and amplifier U2 end of oppisite phase, amplifier U2 in-phase end connects stake resistance R2, amplifier U2 output terminal is the contact resistance R1 other end respectively, the electric capacity C2 other end and resistance R3, the resistance R3 other end connects direct earth capacitance C3 and output end vo respectively.
As the further scheme of the present invention: described power supply VCC voltage is 3.3V.
As the further scheme of the present invention: described CO sensor adopts electrochemical element ME3-CO.
As the present invention's further scheme: described amplifier U2 and amplifier U3 all adopts AD8572.
Compared with prior art, the invention has the beneficial effects as follows: after the signal that the CO detection module that the present invention is applied to security against fire can detect CO sensor processes, send into controller again, circuit structure is simple, cost is low, volume is little, greatly can increase the life-span of the alarm controller using this module, increase stability.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the CO detection module being applied to security against fire.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, in the embodiment of the present invention, a kind of CO detection module being applied to security against fire, comprise CO sensor U1, resistance R1, electric capacity C1, field effect transistor VS, amplifier U3 and amplifier U2, CO sensor U1 pin C connects electric capacity C1 and amplifier U3 output terminal respectively, the D pole of CO sensor U1 pin R difference contact resistance R5 and field effect transistor VS and resistance R5, the resistance R5 other end connects the electric capacity C1 other end and resistance R6 respectively, the resistance R6 other end connects amplifier U3 end of oppisite phase, amplifier U3 in-phase end connects stake resistance R7, the S pole of described field effect transistor VS connects CO sensor U1 pin W and resistance R4 respectively, the G pole of field effect transistor VS connects power supply VCC by resistance R3, the resistance R4 other end is contact resistance R1 respectively, electric capacity C2 and amplifier U2 end of oppisite phase, amplifier U2 in-phase end connects stake resistance R2, amplifier U2 output terminal is the contact resistance R1 other end respectively, the electric capacity C2 other end and resistance R3, the resistance R3 other end connects direct earth capacitance C3 and output end vo respectively, power supply VCC voltage is 3.3V, CO sensor adopts electrochemical element ME3-CO, described amplifier U2 and amplifier U3 all adopts AD8572.
Principle of work of the present invention is: refer to Fig. 1, C0 detects and adopts electrochemical element ME3-CO, this element obtains the low current signal be directly proportional to C0 gas concentration, this signal just can be delivered to outside and carry out A/D conversion after must nursing one's health, wherein U3, R5 ~ R7, C1 forms constant potential circuit, make C, R bipod of U1 and and W pin between current potential keep constant; U2, R1, C2 form signal amplification circuit, be used for the electric current produced when detecting gas electrolysis in CO sensor, the feeble signal of sensor is amplified, and there is low-pass filtering function, can high-frequency interferencing signal in filtering detection signal, detection signal after amplification is input to outside A/D converter by output end vo and carries out AD conversion, then delivers to outside controller.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention 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 present invention.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 (4)
1. one kind is applied to the CO detection module of security against fire, comprise CO sensor U1, resistance R1, electric capacity C1, field effect transistor VS, amplifier U3 and amplifier U2, it is characterized in that, CO sensor U1 pin C connects electric capacity C1 and amplifier U3 output terminal respectively, the D pole of CO sensor U1 pin R difference contact resistance R5 and field effect transistor VS and resistance R5, the resistance R5 other end connects the electric capacity C1 other end and resistance R6 respectively, the resistance R6 other end connects amplifier U3 end of oppisite phase, amplifier U3 in-phase end connects stake resistance R7, the S pole of described field effect transistor VS connects CO sensor U1 pin W and resistance R4 respectively, the G pole of field effect transistor VS connects power supply VCC by resistance R3, the resistance R4 other end is contact resistance R1 respectively, electric capacity C2 and amplifier U2 end of oppisite phase, amplifier U2 in-phase end connects stake resistance R2, amplifier U2 output terminal is the contact resistance R1 other end respectively, the electric capacity C2 other end and resistance R3, the resistance R3 other end connects direct earth capacitance C3 and output end vo respectively.
2. the CO detection module being applied to security against fire according to claim 1, is characterized in that, described power supply VCC voltage is 3.3V.
3. the CO detection module being applied to security against fire according to claim 1, is characterized in that, described CO sensor adopts electrochemical element ME3-CO.
4. the CO detection module being applied to security against fire according to claim 1, it is characterized in that, described amplifier U2 and amplifier U3 all adopts AD8572.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510837271.7A CN105354995A (en) | 2015-11-26 | 2015-11-26 | CO detection module applied to fire-fighting safety |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510837271.7A CN105354995A (en) | 2015-11-26 | 2015-11-26 | CO detection module applied to fire-fighting safety |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105354995A true CN105354995A (en) | 2016-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510837271.7A Pending CN105354995A (en) | 2015-11-26 | 2015-11-26 | CO detection module applied to fire-fighting safety |
Country Status (1)
| Country | Link |
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| CN (1) | CN105354995A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188278B1 (en) * | 1998-03-03 | 2001-02-13 | Thorn Security Limited | Amplification circuits |
| CN202614719U (en) * | 2012-05-14 | 2012-12-19 | 常州迪泰科特测控设备有限公司 | Amplifying circuit for carbon monoxide sensor |
| CN105136878A (en) * | 2015-08-14 | 2015-12-09 | 成都易思科科技有限公司 | CO detection signal amplifying circuit |
| CN204882451U (en) * | 2015-08-14 | 2015-12-16 | 成都易思科科技有限公司 | CO detects signal amplification circuit |
| CN205194023U (en) * | 2015-11-26 | 2016-04-27 | 兴化市成顺消防科技研究院有限公司 | Be applied to CO detection module of security against fire |
-
2015
- 2015-11-26 CN CN201510837271.7A patent/CN105354995A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188278B1 (en) * | 1998-03-03 | 2001-02-13 | Thorn Security Limited | Amplification circuits |
| CN202614719U (en) * | 2012-05-14 | 2012-12-19 | 常州迪泰科特测控设备有限公司 | Amplifying circuit for carbon monoxide sensor |
| CN105136878A (en) * | 2015-08-14 | 2015-12-09 | 成都易思科科技有限公司 | CO detection signal amplifying circuit |
| CN204882451U (en) * | 2015-08-14 | 2015-12-16 | 成都易思科科技有限公司 | CO detects signal amplification circuit |
| CN205194023U (en) * | 2015-11-26 | 2016-04-27 | 兴化市成顺消防科技研究院有限公司 | Be applied to CO detection module of security against fire |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160224 |