CN101551326B - Intelligent wireless vehicular embedded analytical equipment for automobile exhaust - Google Patents
Intelligent wireless vehicular embedded analytical equipment for automobile exhaust Download PDFInfo
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- CN101551326B CN101551326B CN200910301396.2A CN200910301396A CN101551326B CN 101551326 B CN101551326 B CN 101551326B CN 200910301396 A CN200910301396 A CN 200910301396A CN 101551326 B CN101551326 B CN 101551326B
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Abstract
The invention relates to an intelligent wireless vehicular embedded analytical equipment for automobile exhaust, which includes housing with gaseous current alley way, central processing element and wireless transfers unit electrically connects with central processing element set in, the wireless transfers unit wireless connects with wireless vehicle speed sensor set at the automobile. In the gaseous current alley way, there sets gas pressure sensor which electrically connects with central processing element, nitrous oxides feeler unit, gas flow meter, oxygen gas feeler unit, heat meter, oxycarbide and oxyhydride feeler unit. This invention can get the concentration values of oxygen gas, nitrous oxides, oxycarbide and oxyhydride contained in automobile exhaust and the flow, pressure, temperature and other parameters of automobile exhaust at one time, which makes comprehensive and perfect judgment on the exhaust discharged by the automobile, obtains the mass discharged values of automobile exhaust, and wirelessly sends to detecting person or unit in long distance, and the detecting efficiency of the invention is high.
Description
Technical field
The invention belongs to the gas-monitoring field, relate in particular to a kind of intelligent wireless vehicular embedded analytical equipment for automobile exhaust.
Background technology
Mainly comprise CO2, CO and CHization thing and NOization thing in the tail gas of motor vehicle emission, along with increasing rapidly of motor vehicles, being discharged into airborne CO2, CO and CHization thing and NOization thing can get more and more, negative effects such as the greenhouse effect that cause are also serious day by day, and serious threat is to human existence.Therefore, also increasingly stringent of our exhaust gas discharging standard of formulating.And traditional gas analyzer can only be measured certain class content of emission gases, synchronization can only obtain limited several data, can't obtain the multiple gases content concn of vehicle exhaust and the multiple parameter of emission gases simultaneously, as flow, pressure etc., be difficult to motor vehicle emission tail gas is made perfect judge comprehensively, detection efficiency is low, uses inconvenient.
Summary of the invention
The present invention mainly solves original vehicle exhaust analytical equipment and can only measure certain class content in the gas, synchronization can only obtain limited several data, can't obtain the multiple gases content concn of vehicle exhaust and the multiple parameter of emission gases simultaneously, as flow, pressure etc., be difficult to motor vehicle emission tail gas is made perfect judge comprehensively, detection efficiency is low, uses inconvenient technical matters; Providing a kind of can detect the multiple gases content of vehicle exhaust at synchronization, and can detect other parameter of discharging tail gas simultaneously, as flow, pressure etc., thereby can make perfect judge comprehensively to motor vehicle emission tail gas, the detection efficiency height, intelligent wireless vehicular embedded analytical equipment for automobile exhaust easy to use.
Above-mentioned technical matters of the present invention is mainly solved by following technical proposals: the housing that gas channel is arranged in the present invention includes, the inlet end of gas channel is located at a side of housing, the opposite side of housing is located in the outlet side of gas channel, be provided with gas pressure sensor in the described gas channel, NOx sensor, gas meter, oxygen sensor, oxycarbide and hydrocarbons sensor, also be provided with CPU (central processing unit) in the described housing, wireless transmission unit, described wireless transmission unit, gas pressure sensor, NOx sensor, gas meter, oxygen sensor, oxycarbide and hydrocarbons sensor all are electrically connected with CPU (central processing unit).During use, the present invention is installed between the gas exhaust duct and sound suppressor of automobile, and the inlet end of gas channel of the present invention links to each other with automobile exhaust pipe, and the outlet side of gas channel links to each other with sound suppressor.The tail gas of gas exhaust duct enters gas channel, detect gas pressure intensity in the gas channel by gas pressure sensor, NOx sensor detects the concentration value of NOx, gas meter detects the gas stream value, oxygen sensor is measured oxygen density value, measure CO2 by oxycarbide and hydrocarbons sensor, the concentration value of CO and CHization thing, above-mentioned data are all given CPU (central processing unit), CPU (central processing unit) goes out the numerical value of automobile transient state exhaust contaminant according to every numerical evaluation, computing obtains the mass discharge value, and by wireless transmission unit this discharge value is sent to testing personnel at a distance.Use the present invention, synchronization can obtain other parameters such as the multiple gases content value of vehicle exhaust and flow, pressure, thereby can make perfect judge comprehensively motor vehicle emission tail gas, the detection efficiency height, easy to use.
As preferably, described gas pressure sensor is than the inlet end setting of gas meter, the more close gas channel of oxygen sensor.Guarantee that the pressure data that gas pressure sensor records is comparatively accurate.
As preferably, described oxycarbide and hydrocarbons sensor comprise infrared light supply, infrared radiation source modulating unit, catoptron, thermopile detector, be provided with a path channels vertical in the described housing with described gas channel, described infrared light supply and thermopile detector are located at an end of path channels, two symmetrical mutually catoptrons are located at the other end of path channels, and the infrared radiation source modulating unit is electrically connected with infrared light supply.Oxycarbide and hydrocarbons sensor are to utilize not beam split infrared absorption method to survey the device of CO2, CO and CHization substrate concentration value in the tail gas.The infrared radiation source modulating unit sends modulating pulse, the control infrared radiation source sends interrupted infrared light, infrared light sweep gas circulation road shines on the catoptron of the other end that is positioned at path channels, shines on the thermopile detector behind two secondary reflections through two catoptrons again.In this illumination path, the infrared light of some frequency range is by the CO2 in the gas channel, CO and CH gas absorption, light intensity decreasing, thermopile detector detects the light intensity that these frequency ranges weaken, the infrared acquisition circuit calculates above-mentioned three kinds of gases concentration value separately according to the Lambert-Beer absorption law, sends CPU (central processing unit) at last to.
As preferably, the length of described path channels is 1.5～3.5 times of diameter of gas channel, and the diameter of path channels is less than or equal to the radius of gas channel.Gas channel is the consistent all the time put-through channel of diameter, is convenient to air-flow and passes through smoothly.Sufficiently long path channels prolongs the distance that light passes through, and also reduces and disturbs, and improves the detection accuracy of oxycarbide and hydrocarbons.
As preferably, described gas meter comprises eddy current generation body and piezoelectric sensor, piezoelectric sensor is located on the conduit wall of gas channel, and eddy current generation body penetrates in the housing from described outside, and it is interior and contiguous with piezoelectric sensor that the termination of eddy current generation body is exposed to gas channel.Eddy current generation body is used to produce eddy current in dilution air flow, these eddy current are discharged in the air-flow according to certain frequency.Piezoelectric sensor is divided into the transmission piezoelectric unit again and receives piezoelectric unit two parts, is used for measuring the frequency from the eddy current of eddy current generation body release.Send piezoelectric unit and send ultrasound wave to receiving piezoelectric unit according to certain frequency, the eddy current that ultrasound wave and eddy current generation body are produced interferes, receive piezoelectric unit and just can calculate interference frequencies according to the ultrasonic signal of receiving, calculate the release frequency of eddy current then by this frequency values, send to CPU (central processing unit).The release frequency of eddy current is that the volumetric flow rate with gas is directly proportional, and in view of the above, is calculated the flow value of air-flow by CPU (central processing unit).
As preferably, be provided with first screened room in the described housing, oxygen sensor, CPU (central processing unit), wireless transport module are located in first screened room, and the draft tube of oxygen sensor, escape pipe penetrate first screened room and the air inlet mouth of pipe, the mouth of pipe of giving vent to anger is positioned at described gas channel.Oxygen sensor is used for the oxygen concentration in the test airflow passage.Gas is compulsorily entered in the draft tube of oxygen sensor, contacts the back with zirconium dioxide in the pipeline and discharges from escape pipe.In contact process, can produce small electric current, calculate oxygen concentration in the per second air-flow, give CPU (central processing unit) again according to galvanometer.Oxygen sensor, CPU (central processing unit), wireless transport module are placed in first screened room, play excellent shielding effect, and the accuracy of measuring is guaranteed in the interference of opposing external electromagnetic ripple.
As preferably, the described air inlet mouth of pipe and the mouth of pipe of giving vent to anger all are angles, and the angle of the air inlet mouth of pipe is towards the inlet end of gas channel, and the angle of the mouth of pipe of giving vent to anger is towards the outlet side of gas channel.The gas of gas channel of guaranteeing to flow through can successfully flow into the air inlet mouth of pipe, behind the oxygen sensor of flowing through, successfully flows out from the mouth of pipe of giving vent to anger again.
As preferably, be provided with the secondary shielding chamber in the described housing, it is indoor that the infrared radiation source modulating unit is located at described secondary shielding.Excellent shielding effect is played to the infrared radiation source modulating unit in the secondary shielding chamber, makes the infrared radiation source modulating unit can not be subjected to the interference of external electromagnetic ripple, guarantees the accuracy and the stability of modulating, and guarantees the accurate measurement of CO2, CO and CHization substrate concentration value.
As preferably, also be provided with temperature sensor in the described gas channel, the detection top of temperature sensor is positioned at the center line of gas channel, and temperature sensor is electrically connected with described CPU (central processing unit).Temperature sensor is measured the gas temperature that passes through in the gas channel, guarantees that the temperature value that records is more accurate, gives CPU (central processing unit) again.
As preferably, described wireless transmission unit be located at automobile on wireless linking to each other of wireless vehicle speed sensor.Wireless vehicle speed sensor does not belong to the present invention, but the present invention provides data channel to it.Wireless vehicle speed sensor is installed in the motor car engine, and the tach signal of the engine that records sends CPU (central processing unit) of the present invention to by wireless transmission unit is wireless.Wireless transmission unit is divided reception and is sent two parts, is used for receiving automobile speed information and sends CPU (central processing unit) to, and the mass discharge result that the CPU (central processing unit) analysis obtains is sent to the tester or detected unit by wireless transmission unit again.
The invention has the beneficial effects as follows: can obtain other parameter such as flow, pressure, temperature of the concentration value of oxygen contained in the vehicle exhaust, oxides of nitrogen, oxycarbide and hydrocarbons and vehicle exhaust at synchronization, thereby can make perfect judge comprehensively to motor vehicle emission tail gas, obtain the mass discharge value of vehicle exhaust, and be wirelessly sent to testing staff at a distance or detect unit, the detection efficiency height, easy to use.
Description of drawings
Fig. 1 is a kind of schematic block circuit diagram of the present invention.
Fig. 2 is a kind of sectional structure synoptic diagram of the present invention.
1. housings among the figure, 2. gas channel, 21. inlet ends, 22. outlet sides, 3. gas pressure sensor, 4. NOx sensor, 5. gas meter, 51. eddy current generation bodies, 52. piezoelectric sensor, 6. oxygen sensor, 61. draft tube, 62. escape pipes, 7. path channels, 8. infrared light supply, 9. thermopile detector, 10. catoptron, 11. CPU (central processing unit), 12. wireless transmission unit, 13. infrared radiation source modulating units, 14. temperature sensor, 15. first screened rooms, secondary shielding chambers 16..
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: the intelligent wireless vehicular embedded analytical equipment for automobile exhaust of present embodiment, as shown in Figure 2, the housing 1 of gas channel 2 is arranged in comprising, the inlet end 21 of gas channel 2 is positioned at the right side of housing 1, and the outlet side 22 of gas channel 2 is positioned at the left side of housing 1.Near inlet end 21 places a path channels 7 vertical with gas channel 2 is arranged in the housing 1, the middle separated time of path channels 7 and the dead in line of gas channel 2, the length of path channels 7 is 3 times of diameter of gas channel 2, the diameter of path channels 7 equals the radius of gas channel 2, one end of path channels 7 is equipped with infrared light supply 8 and thermopile detector 9, the other end of path channels 7 has two catoptrons 10 of symmetry mutually, a secondary shielding chamber 16 is arranged in the housing on infrared light supply 8 the right, the infrared radiation source modulating unit 13 that is electrically connected with infrared light supply 8 is installed in the secondary shielding chamber 16.Infrared light supply 8, infrared radiation source modulating unit 13, catoptron 10, thermopile detector 9 constitute oxycarbide and hydrocarbons sensor.
Measuring process: during use, the present invention is installed between the gas exhaust duct and sound suppressor of automobile, and the inlet end of gas channel of the present invention links to each other with automobile exhaust pipe by internal thread, and the outlet side of gas channel links to each other with sound suppressor by internal thread.The tail gas of gas exhaust duct enters gas channel, is at first shone by infrared light supply, shines on the thermopile detector through behind two secondary reflections of catoptron again, and the light path path is shown in dotted line small arrow among Fig. 2.In this illumination path, the infrared light of some frequency range is by the CO2 in the gas channel, CO and CH gas absorption, light intensity decreasing, thermopile detector detects the light intensity that these frequency ranges weaken, the infrared acquisition circuit calculates above-mentioned three kinds of gases concentration value separately according to the Lambert-Beer absorption law, sends CPU (central processing unit) at last to.
Vehicle exhaust continues to flow to the outlet side of gas channel, air flow direction is shown in the big arrow of dotted line among Fig. 2, in this process, detect gas pressure intensity in the gas channel by gas pressure sensor, NOx sensor detects the concentration value of NOx, temperature sensor is measured the gas temperature that passes through in the gas channel, all gives CPU (central processing unit).
Eddy current generation body is used to produce eddy current in dilution air flow, these eddy current are discharged in the air-flow according to certain frequency.Piezoelectric sensor is divided into the transmission piezoelectric unit again and receives piezoelectric unit two parts, is used for measuring the frequency from the eddy current of eddy current generation body release.Send piezoelectric unit and send ultrasound wave to receiving piezoelectric unit according to certain frequency, the eddy current that ultrasound wave and eddy current generation body are produced interferes, receive piezoelectric unit and just can calculate interference frequencies according to the ultrasonic signal of receiving, calculate the release frequency of eddy current then by this frequency values, send to CPU (central processing unit).The release frequency of eddy current is that the volumetric flow rate with gas is directly proportional, and in view of the above, is calculated the flow value of air-flow by CPU (central processing unit).
Oxygen sensor is used for the oxygen concentration in the test airflow passage.Gas is compulsorily entered in the draft tube of oxygen sensor, contacts the back with zirconium dioxide in the pipeline and discharges from escape pipe.In contact process, can produce small electric current, calculate oxygen concentration in the per second air-flow, give CPU (central processing unit) again according to galvanometer.
Wireless transmission unit is used for receiving the automobile speed information that the wireless vehicle speed sensor on the automobile sends and sends CPU (central processing unit) to.CPU (central processing unit) goes out the numerical value of automobile transient state exhaust contaminant according to the every numerical evaluation that obtains, computing obtains the mass discharge value, and various parameters, the automobile speed value of this discharge value and tail gas sent to testing staff at a distance or detect unit by wireless transmission unit, thereby can make perfect judge comprehensively to motor vehicle emission tail gas, the detection efficiency height, easy to use.
Claims (8)
1. intelligent wireless vehicular embedded analytical equipment for automobile exhaust, the housing (1) that gas channel (2) are arranged in comprising, the inlet end (21) of gas channel (2) is located at a side of housing (1), the opposite side of housing (1) is located in the outlet side (22) of gas channel (2), it is characterized in that being provided with in the described gas channel (2) gas pressure sensor (3), NOx sensor (4), gas meter (5), oxygen sensor (6), oxycarbide and hydrocarbons sensor, also be provided with CPU (central processing unit) (11) in the described housing (1), wireless transmission unit (12), described wireless transmission unit (12), gas pressure sensor (3), NOx sensor (4), gas meter, oxygen sensor (6), oxycarbide and hydrocarbons sensor all are electrically connected with CPU (central processing unit) (11); Described oxycarbide and hydrocarbons sensor comprise infrared light supply (8), infrared radiation source modulating unit (13), catoptron (10), thermopile detector (9), be provided with a path channels (7) vertical in the described housing (1) with described gas channel (2), described infrared light supply (8) and thermopile detector (9) are located at an end of path channels (7), two symmetrical mutually catoptrons (10) are located at the other end of path channels (7), and infrared radiation source modulating unit (13) is electrically connected with infrared light supply (8); The length of described path channels (7) is 1.5～3.5 times of diameter of gas channel (2), and the diameter of path channels (7) is less than or equal to the radius of gas channel (2).
2. intelligent wireless vehicular embedded analytical equipment for automobile exhaust according to claim 1 is characterized in that described gas pressure sensor (3) is provided with than the inlet end (21) of gas meter (5), the more close gas channel of oxygen sensor (6) (2).
3. intelligent wireless vehicular embedded analytical equipment for automobile exhaust according to claim 1 and 2, it is characterized in that described gas meter (5) comprises eddy current generation body (51) and piezoelectric sensor (52), piezoelectric sensor (52) is located on the conduit wall of gas channel (2), eddy current generation body (51) penetrates in the housing (1) from described housing (1) outside, and it is interior and contiguous with piezoelectric sensor (52) that the termination of eddy current generation body (51) is exposed to gas channel (2).
4. intelligent wireless vehicular embedded analytical equipment for automobile exhaust according to claim 1 and 2, it is characterized in that being provided with in the housing (1) first screened room (15), oxygen sensor (6), CPU (central processing unit) (11), wireless transport module (12) are located in first screened room (15), and the draft tube (61) of oxygen sensor (6), escape pipe (62) penetrate first screened room (15) and the air inlet mouth of pipe, the mouth of pipe of giving vent to anger is positioned at described gas channel (2).
5. intelligent wireless vehicular embedded analytical equipment for automobile exhaust according to claim 4, its feature all is an angle at the described air inlet mouth of pipe and the mouth of pipe of giving vent to anger, the angle of the air inlet mouth of pipe is towards the inlet end (21) of gas channel (2), and the angle of the mouth of pipe of giving vent to anger is towards the outlet side (22) of gas channel (2).
6. intelligent wireless vehicular embedded analytical equipment for automobile exhaust according to claim 1 is characterized in that being provided with secondary shielding chamber (16) in the described housing (1), and infrared radiation source modulating unit (13) is located in the described secondary shielding chamber (16).
7. intelligent wireless vehicular embedded analytical equipment for automobile exhaust according to claim 1 and 2, it is characterized in that also being provided with in the described gas channel (2) temperature sensor (14), the detection top of temperature sensor (14) is positioned at the center line of gas channel (2), and temperature sensor (14) is electrically connected with described CPU (central processing unit) (11).
8. intelligent wireless vehicular embedded analytical equipment for automobile exhaust according to claim 1, wireless the linking to each other of wireless vehicle speed sensor on it is characterized in that described wireless transmission unit (12) and being located at automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910301396.2A CN101551326B (en) | 2009-04-08 | 2009-04-08 | Intelligent wireless vehicular embedded analytical equipment for automobile exhaust |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910301396.2A CN101551326B (en) | 2009-04-08 | 2009-04-08 | Intelligent wireless vehicular embedded analytical equipment for automobile exhaust |
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| Publication Number | Publication Date |
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| CN101551326A CN101551326A (en) | 2009-10-07 |
| CN101551326B true CN101551326B (en) | 2011-01-05 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964120A (en) * | 2010-08-30 | 2011-02-02 | 山东天海电装有限公司 | Low-carbon intelligent automobile driving recorder |
| KR101755712B1 (en) | 2011-10-05 | 2017-07-10 | 현대자동차주식회사 | Apparatus for measuring concentration of co2 for vehicle |
| CN102778537B (en) * | 2012-06-20 | 2014-11-05 | 浙江省计量科学研究院 | System and method for remotely monitoring automobile tail gas |
| CN103196785A (en) * | 2013-04-26 | 2013-07-10 | 张金川 | Gas rapid measuring analysis mete and measuring method thereof |
| CN103398973B (en) * | 2013-08-08 | 2016-01-20 | 上海化工研究院 | A kind of multi-wavelength complex spectrum analogy method mobile gas detection alarm device |
| CN103592414B (en) * | 2013-09-12 | 2015-07-29 | 南通明德重工有限公司 | A kind of waste emission detection system for boats and ships |
| CN103954322A (en) * | 2014-05-09 | 2014-07-30 | 中国石油化工股份有限公司 | Oil gas emission testing system of oil storage tank |
| CN104880537A (en) * | 2015-05-25 | 2015-09-02 | 中国计量学院 | Automobile exhaust gas detection device and compensation algorithm thereof |
| CN105488866A (en) * | 2015-12-31 | 2016-04-13 | 天津云视科技发展有限公司 | Vehicle safety monitoring system based on Internet of Things |
| CN106841534A (en) * | 2017-03-28 | 2017-06-13 | 吉林大学 | Self-power wireless lambda sensor |
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2009
- 2009-04-08 CN CN200910301396.2A patent/CN101551326B/en not_active Expired - Fee Related
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