CN102910129A - Hazardous gas detection system for automobile - Google Patents
Hazardous gas detection system for automobile Download PDFInfo
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- CN102910129A CN102910129A CN 201210389630 CN201210389630A CN102910129A CN 102910129 A CN102910129 A CN 102910129A CN 201210389630 CN201210389630 CN 201210389630 CN 201210389630 A CN201210389630 A CN 201210389630A CN 102910129 A CN102910129 A CN 102910129A
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- hazardous gas
- body controller
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Abstract
The invention discloses a hazardous gas detection system for an automobile, which is characterized by comprising a hazardous gas detector, an alarm device and an automobile body controller, wherein the hazardous gas detector is used for detecting the concentration change of hazardous gas in the automobile and transmitting a detection signal to the automobile body controller; the automobile body controller is used for sampling the signal transmitted by the hazardous gas detector, outputting alarm information and controlling a power window; and the alarm device is used for receiving an alarm signal output by the automobile body controller and outputting an acousto-optic alarm signal. According to the hazardous gas detection system, the hazardous gas detection is combined with the automobile body controller, the real-time hazardous gas detection in the automobile is achieved, timely alarm is achieved, the personal safety is ensured, and the window can be opened actively if necessary for ventilation.
Description
Technical field
The invention belongs to the hazardous gas detection field, particularly relate to a kind of automobile hazardous gas checking system.
Background technology
Hazardous gas concentration over-standard causing death event often has generation recently in the car.Some people in the garage in order to turn on the aircondition or warm braw and driving driving engine and cause exhaust emissions smooth and cause that tail gas is poisoned to death.Vehicle exhaust contains a large amount of carbonic oxides, and these carbonic oxides only have small part to remain in the car body along with the overwhelming majority of travelling of car has been discharged to beyond the car body at ordinary times.The time that people sit in car is shorter, and people's window of driving sometimes is not so have sensation usually.And vehicle stationary is motionless especially enter in the storehouse after, if driving engine continue opening carbonic oxide will a large amount of residual cars in, the gas of this odorless, tasteless finally can cause occupant's dusk lethargic sleep in insentience to be gone, and is poisoned to death.Generally in carbon-monoxide concentration reaches 30 percent environment, breathe and surpass 20 minutes and just can poison, in carbon-monoxide concentration reaches 40 percent environment, breathe surpass 20 minutes just may be dead.Add gas-hazard meter in automotive trim, in time detection and alarm will be very necessary for this reason.
Summary of the invention
The object of the invention be to provide a kind of can inspection vehicle in hazardous gas concentration and send the automobile hazardous gas checking system of warning.
The present invention adopts following technical scheme for achieving the above object:
A kind of automobile hazardous gas checking system, it is characterized in that: it comprises gas-hazard meter, warning device, car body controller; Wherein
Described gas-hazard meter is for detection of the hazardous gas change in concentration in the car, and sends detection signal to described car body controller;
Described car body controller is used for the signal that gas-hazard meter transmits is sampled, and output alarm information is also controlled automatic window;
Described warning device is used for receiving the alerting signal of car body controller output, output sound and light alarm signal.
Preferably: described gas-hazard meter adopts electrochemical sensor, is arranged on the car inner top.Vehicle exhaust primary hazard gas is carbonic oxide, because its proportion is light than other gas, so the hazardous gas sensor can be placed on the so not unobstructed position of roof air-flow.Gas-hazard meter adopts electrochemical sensor, and this sensor can be contained the most common gas in the environment, such as carbonic oxide (CO), sulphur dioxide (SO
2), hydrogen sulphide (H
2S) and nitrogen dioxide (NO
2) etc.Compare with other hazardous gas method of inspection, the characteristics such as that electrochemical sensor has is low in energy consumption, cross sensitivity is low, long-time stability are outstanding are fit to battery powered applied environment in the automobile very much.
It is further characterized in that: described gas-hazard meter is powered by car body controller, comprises normal voltage module, the first amplifier, electrochemical sensor, field effect transistor and the second amplifier;
Described normal voltage module provides normal voltage for the first amplifier and the second amplifier;
Described electrochemical sensor comprises reference electrode, working electrode and aux. electrode; The first amplifier is by the reference electrode power supply of field effect transistor to electrochemical sensor, and reference electrode makes the voltage of working electrode keep stable, so that working sensor is within the range of linearity; The working electrode of electrochemical sensor detects hazardous gas, and according to gas concentration generation current in proportion, aux. electrode makes the electric current that produces on the working electrode node reach balance; The reference electrode node keeps voltage by potentiostatic circuit, and the electric current that provides the aux. electrode node to produce; The second amplifier is converted to the A/D thief hatch that voltage signal is sent to car body controller to the working electrode current signal through the baric flow conversion circuit.
The present invention detects in conjunction with car body controller by hazardous gas etc.Realized in real time hazardous gas detection in the car, and the living safety of alarm bondsman, the effect that vehicle window reaches ventilation can also initiatively be opened in case of necessity.
Description of drawings
Fig. 1 is scheme drawing of the present invention.
Fig. 2 is the gas-hazard meter circuit diagram.
The specific embodiment
A kind of automobile hazardous gas checking system as shown in Figure 1: it comprises gas-hazard meter 1, warning device, car body controller 3; Wherein
Described gas-hazard meter 1 is for detection of the hazardous gas change in concentration in the car, and sends detection signal to described car body controller 3;
Described car body controller 3 is used for the signal that gas-hazard meter transmits is sampled, and output alarm information is also controlled automatic window 5,6;
Described warning device is used for receiving the alerting signal of car body controller output, output sound and light alarm signal.
Preferably: described gas-hazard meter 1 adopts electrochemical sensor, is arranged on the car inner top.Vehicle exhaust primary hazard gas is carbonic oxide, because its proportion is light than other gas, so the hazardous gas sensor can be placed on the so not unobstructed position of roof air-flow.Gas-hazard meter adopts electrochemical sensor, and this sensor can be contained the most common gas in the environment, such as carbonic oxide (CO), sulphur dioxide (SO
2), hydrogen sulphide (H
2S) and nitrogen dioxide (NO
2) etc.Compare with other hazardous gas method of inspection, the characteristics such as that electrochemical sensor has is low in energy consumption, cross sensitivity is low, long-time stability are outstanding are fit to battery powered applied environment in the automobile very much.
Described gas-hazard meter 1 comprises normal voltage module 11, the first amplifier 12, electrochemical sensor 13, field effect transistor 14 and the second amplifier 15 by car body controller 3 power supplies as shown in Figure 2;
Described normal voltage module 11 provides normal voltage for the first amplifier 12 and the second amplifier 15;
Described electrochemical sensor comprises reference electrode RE, working electrode WE and aux. electrode CE; The reference electrode RE power supply that the first amplifier 12 is given electrochemical sensor by field effect transistor 14, reference electrode RE makes the voltage of working electrode WE keep stable, so that working sensor is within the range of linearity; The working electrode WE of electrochemical sensor detects hazardous gas, and according to gas concentration generation current in proportion, aux. electrode CE makes the electric current that produces on the working electrode WE node reach balance; Reference electrode RE node keeps voltage by potentiostatic circuit, and the electric current that provides aux. electrode CE node to produce; The second amplifier 15 is converted to the A/D thief hatch that voltage signal is sent to car body controller 3 to working electrode WE current signal through the baric flow conversion circuit.Car body controller 3 will judge whether hazardous gas exceeds standard, if exceed standard by buzzer warning on the car, and show at instrument desk.If severe overweight will be opened electric window induced ventilation etc. automatically.
The present invention mainly utilizes the dangerous concentrations in the hazardous gas sensor inspection vehicle.When concentration has when harm and alarm to the people, the hazardous gas sensor adopts electrochemical method.Take carbonic oxide as example, when CO gas is diffused on the working electrode WE surface through ventilated membrane by the pore on the sensor outer housing, under the catalytic action of working electrode WE, oxidation occurs at working electrode WE in CO gas.Its reaction formula is:
CO+H
2O→CO
2+2H++2e-
At working electrode H+ ion and the electronics that oxidizing reaction produces occuring, transfers to working electrode WE by battery acid and keep on the aux. electrode CE of certain intervals, with the oxygen generation reduction reaction in the water.Its reaction formula is:
1/2O
2+2H++2e-→H
2O
Therefore, the reversible process of oxidation-reduction has just occured in sensor internal.Its reaction formula is:
2CO+2O
2?→2CO
2?
The reversible process of this oxidation-reduction is occuring between at working electrode and to electrode all the time, and produces difference of potential between electrode.But because the reaction that occurs at two electrodes all can make electrode polarization, this thereby has also limited the detectable scope of carbon-monoxide concentration so that electrode potential is difficult to keep constant.In order to keep the constant of electrode potential, introduced a reference electrode RE.In the three-electrode electro Chemical gas sensor, its mouth reflects is potential change between reference electrode and the working electrode, because reference electrode does not participate in oxidation or reduction reaction, therefore it can make the current potential of interpolar keep constant (being constant potential), and this moment, the variation of current potential was just directly relevant with the variation of carbonic oxide concentration.When gas sensor produced outgoing current, its size was directly proportional with the concentration of gas.By the size of electrode outlet line with external circuit survey sensor outgoing current, just can detect the concentration of carbonic oxide, and very wide linear measurement range is arranged.Like this, external signal acquisition circuit and corresponding conversion and output circuit just can be realized examination and controlling to CO gas on gas sensor.
Claims (3)
1. automobile hazardous gas checking system, it is characterized in that: it comprises gas-hazard meter, warning device, car body controller; Wherein
Described gas-hazard meter is for detection of the hazardous gas change in concentration in the car, and sends detection signal to described car body controller;
Described car body controller is used for the signal that gas-hazard meter transmits is sampled, and output alarm information is also controlled automatic window;
Described warning device is used for receiving the alerting signal of car body controller output, output sound and light alarm signal.
2. automobile hazardous gas checking system according to claim 1 is characterized in that: described gas-hazard meter adopts electrochemical sensor, is arranged on the car inner top.
3. automobile hazardous gas checking system according to claim 2, it is characterized in that: described gas-hazard meter is powered by car body controller, comprises normal voltage module, the first amplifier, electrochemical sensor, field effect transistor and the second amplifier;
Described normal voltage module provides normal voltage for the first amplifier and the second amplifier;
Described electrochemical sensor comprises reference electrode, working electrode and aux. electrode; The first amplifier is by the reference electrode power supply of field effect transistor to electrochemical sensor, and reference electrode makes the voltage of working electrode keep stable, so that working sensor is within the range of linearity; The working electrode of electrochemical sensor detects hazardous gas, and according to gas concentration generation current in proportion, aux. electrode makes the electric current that produces on the working electrode node reach balance; The reference electrode node keeps voltage by potentiostatic circuit, and the electric current that provides the aux. electrode node to produce; The second amplifier is converted to the A/D thief hatch that voltage signal is sent to car body controller to the working electrode current signal through the baric flow conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210389630 CN102910129A (en) | 2012-10-15 | 2012-10-15 | Hazardous gas detection system for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210389630 CN102910129A (en) | 2012-10-15 | 2012-10-15 | Hazardous gas detection system for automobile |
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| Publication Number | Publication Date |
|---|---|
| CN102910129A true CN102910129A (en) | 2013-02-06 |
Family
ID=47608782
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210389630 Pending CN102910129A (en) | 2012-10-15 | 2012-10-15 | Hazardous gas detection system for automobile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076068A (en) * | 2013-03-26 | 2014-10-01 | 深圳市深安旭传感技术有限公司 | Vehicle and monitoring alarm apparatus for environment inside vehicle |
| CN104175953A (en) * | 2014-08-14 | 2014-12-03 | 阿尔特汽车技术股份有限公司 | Monitoring system for toxic gas inside automobile |
| CN106526090A (en) * | 2016-12-09 | 2017-03-22 | 中车株洲电力机车有限公司 | Rail transit vehicle and toxic gas monitoring system thereof |
| CN110562178A (en) * | 2019-09-06 | 2019-12-13 | 广州扬名信息科技有限公司 | In-vehicle induction transmission system |
-
2012
- 2012-10-15 CN CN 201210389630 patent/CN102910129A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076068A (en) * | 2013-03-26 | 2014-10-01 | 深圳市深安旭传感技术有限公司 | Vehicle and monitoring alarm apparatus for environment inside vehicle |
| CN104076068B (en) * | 2013-03-26 | 2017-02-15 | 深圳市深安旭传感技术有限公司 | Vehicle and monitoring alarm apparatus for environment inside vehicle |
| CN104175953A (en) * | 2014-08-14 | 2014-12-03 | 阿尔特汽车技术股份有限公司 | Monitoring system for toxic gas inside automobile |
| CN106526090A (en) * | 2016-12-09 | 2017-03-22 | 中车株洲电力机车有限公司 | Rail transit vehicle and toxic gas monitoring system thereof |
| CN110562178A (en) * | 2019-09-06 | 2019-12-13 | 广州扬名信息科技有限公司 | In-vehicle induction transmission system |
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Application publication date: 20130206 |