CN213121586U - Vehicle exhaust composition detecting system - Google Patents
Vehicle exhaust composition detecting system Download PDFInfo
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- CN213121586U CN213121586U CN202120695758.7U CN202120695758U CN213121586U CN 213121586 U CN213121586 U CN 213121586U CN 202120695758 U CN202120695758 U CN 202120695758U CN 213121586 U CN213121586 U CN 213121586U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The utility model relates to the technical field of vehicle exhaust detection, in particular to a vehicle exhaust component detection system, which comprises a first sampling area and a data processing module; the first sampling region comprises NO2Sampling line, NO2The sampling pipelines are arranged in sequence along the flowing direction of the tail gasHaving a first condenser and a first infrared gas detection unit, the first condenser being configured to convert NO into a gas2The tail gas to be detected in the sampling pipeline is condensed to a first temperature, and the first infrared gas detection unit is provided with NO2A detection channel and a water detection channel; the data processing module is respectively connected with NO2The detection channel is electrically connected with the water detection channel to obtain NO in the tail gas2And the content of gaseous water. The utility model discloses separately detect tail gas gaseous state water and NO2In an amount to avoid gaseous water and NO2Meanwhile, errors are caused by detection, other components are separately detected, and the content of various components in the tail gas is effectively obtained.
Description
Technical Field
The utility model belongs to the technical field of the vehicle exhaust detects technique and specifically relates to a vehicle exhaust composition detecting system.
Background
The number of motor vehicles in China is continuously increased, tail gas discharged when the motor vehicles run causes great influence on the environment, at present, the emission standard of automobiles in China is equivalent to the European emission standard, the national VI emission standard (GB 18352.6-2016) implemented in 2020 is taken as consideration, and for common household gasoline vehicles, the national VI tail gas detection data standard is as follows: CO, THC, NMHC, Nox, PM are 0.50g/km, 0.050 g/km, 0.035 g/km, 0.0030 g/km, respectively. However, in the prior art, the detection items, the detection flows and the detection devices for the tail gas of the gasoline vehicle and the diesel vehicle are different, and the detection devices cannot be adapted to the detection of the gasoline vehicle and the diesel vehicle at the same time.
In addition, in order to solve the detection interference of other interference factors (such as temperature, humidity and the like) on the tail gas components, the prior art eliminates the influence of the interference factors through compensation calculation, for example, the chinese patent application (patent No. CN 103500770B) provides an infrared gas sensor for multi-gas detection, which specifically discloses a compensation calculation method for parameters such as temperature, humidity and the like, and can more accurately detect the content of the gas to be detected. However, the automobile exhaust has many components, and even if the response wave bands of the components to infrared rays are different, the interference of gaseous water in the exhaust to the detection of other gas components is difficult to avoid.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a vehicle exhaust composition detecting system.
In order to achieve the above object, the present invention provides the following technical solutions.
The vehicle exhaust component detection system comprises a first sampling area and a data processing module; wherein:
the first sampling region comprises NO2Sampling line, NO2The sampling pipeline is provided with a first condenser and a first infrared gas detection unit in sequence along the tail gas flowing direction, and the first condenser is configured to convert NO into2The tail gas to be detected in the sampling pipeline is condensed to a first temperature, and the first infrared gas detection unit is provided with a device for detecting NO in the tail gas2NO of2The device comprises a detection channel and a water detection channel for detecting gaseous water in tail gas;
the data processing module is respectively connected with NO2The detection channel is electrically connected with the water detection channel to obtain NO in the tail gas2And the content of gaseous water.
Preferably, NO2The output end of the sampling pipeline is connected with a sampling pump, NO2And a flow valve is arranged on the sampling pipeline.
Preferably, the first temperature is 25 ℃.
Preferably, the vehicle exhaust gas component detection system further comprises a second sampling area comprising a filtering pipeline, a filtering pipeline and NO2The sampling pipeline is communicated, and the filtering pipeline is provided with a first dust filter.
Preferably, the second sampling district still includes particulate matter sampling pipeline, and particulate matter sampling pipeline is equipped with particulate matter sampling unit and second dust filter along tail gas flow direction in proper order.
Preferably, the second sampling area further comprises a buffer tank, and the buffer tank is respectively connected with the input end of the filtering pipeline and the input end of the particulate matter sampling pipeline.
Preferably, the second sampling area further comprises a hydrocarbon sampling pipeline, the hydrocarbon sampling pipeline is communicated with the output end of the filtering pipeline, and the hydrocarbon sampling pipeline is provided with a total hydrocarbon detection unit.
Preferably, the vehicle exhaust gas component detection system further comprises a third sampling area, which comprises a centralized sampling pipeline, a centralized sampling pipeline and NO2The output end of the sampling pipeline is connected, the centralized sampling pipeline is sequentially provided with a second condenser and a second infrared gas detection unit along the tail gas flowing direction, and the second condenser is configured to condense the tail gas to be detected in the centralized sampling pipeline to a second temperature.
Preferably, the centralized sampling pipeline is also provided with an oxygen sensor.
Preferably, the second temperature is 4 ℃.
The utility model has the advantages that: in NO2Detecting the content of the tail gas in the case of low solubility, and simultaneously separately detecting the tail gas gaseous water and NO2In an amount to avoid gaseous water and NO2Meanwhile, errors are caused by detection, other components are separately detected, and the content of various components in the tail gas is effectively obtained.
Drawings
Fig. 1 is a schematic structural diagram of a vehicle exhaust gas component detection system according to a first embodiment.
Fig. 2 is a schematic structural diagram of a vehicle exhaust gas component detection system according to a second embodiment.
Fig. 3 is a schematic structural diagram of a vehicle exhaust gas component detection system according to a third embodiment.
Fig. 4 is a schematic structural diagram of another vehicle exhaust gas component detection system according to the third embodiment.
Detailed Description
The present invention will be described in detail with reference to the following specific examples.
Example one
The vehicle exhaust component detection system provided by the embodiment comprises a first sampling area 1 and a data processing module 4, and is used for detecting NO of exhaust to be detected2And (5) detecting the content.
As shown in FIG. 1, first sampling region 1 includes NO2Sampling line 11 for the tail gas to be detected from NO2NO flowing into the input of the sampling line 112The output end of the sampling pipeline 11 is connected with a sampling pump 5, NO2The sampling pipeline 11 is provided with a flow valve 6, and the sampling pump 5 is used for generating airflow through NO2The tail gas to be detected in the sampling pipeline 11 is subjected to self-NO reaction under the action of the sampling pump 52One end of the sampling pipe 11 flows to NO2The other end of the line 11 is sampled.
NO2The sampling pipeline 11 is sequentially provided with a first condenser 12 and a first infrared gas detection unit 13 along the tail gas flowing direction, and the first infrared gas detection unitThe unit 13 is provided with means for detecting NO in the exhaust gas2NO of2A detection channel and a water detection channel for detecting gaseous water in the tail gas, a data processing module 4 and NO2The detection channel is electrically connected with the water detection channel according to NO2Obtaining NO in tail gas by detection results of detection channel and water detection channel2And the content of gaseous water.
In actual use, the first condenser 12 is used for mixing NO2The tail gas to be detected in the sampling pipeline 11 is condensed to a first temperature from about 60 ℃, and the drainage end of the first condenser 12 is connected with a peristaltic pump 7 for draining condensed water. Gaseous water still exists in the tail gas after the temperature reduction, and the gaseous water and the gas can influence the detection precision of the first infrared gas detection unit 13 on the gas when being mixed, so that the first infrared gas detection unit 13 can detect NO on the gas2Will be in contact with NO2There is a certain deviation in the actual content of (b).
In this example, in NO2Respectively carrying out infrared radiation on NO in the tail gas in the detection channel and the water detection channel2And the content of gaseous water, according to NO2And measuring the response condition of the gaseous water to obtain a detection result of the response. The data processing module 4 connected to the first infrared gas detection unit 13 obtains the NO detected by the different channels2And the detection value of the gaseous water is used as the original data of the compensation operation, and the detector can operate by himself or by programming in the data processing module 4 to obtain the compensation value. In this embodiment, the data processing module 4 is a computer terminal, the data processing module 4 obtains the required data through serial port connection, and the user writes the operation formula into the data processing module 4 in advance and stores the operation formula, that is, the compensation operation result can be obtained through the data processing module 4.
In this embodiment, the first temperature is 25 ℃ to make NO in the exhaust gas2The dissolution rate at the first temperature is minimized.
Example two
As shown in fig. 2, on the basis of the first embodiment, the vehicle exhaust gas component detection system may further include a second sampling area 2 for pretreating exhaust gas to be detected or performing other item detection.
The second sampling area 2 comprises a filter line 21, the filter line 21 and NO2The sampling pipeline 11 is communicated, the filtering pipeline 21 is provided with a first dust filter 22, and the tail gas to be detected enters from the filtering pipeline 21 and flows to NO after passing through the first dust filter 222 Sampling pipeline 11 avoids the particulate matter to cause the influence to infrared detection result.
Further, the second sampling area 2 further comprises a hydrocarbon sampling pipeline 23, the hydrocarbon sampling pipeline 23 is communicated with the output end of the filtering pipeline 21, the hydrocarbon sampling pipeline 23 is provided with a total hydrocarbon detection unit 24, so that the content of the total hydrocarbon is detected, the total hydrocarbon detection unit 24 is connected with the data processing module 4, and the data processing module 4 obtains the detection result of the total hydrocarbon detection unit 24. The total hydrocarbon detection unit 24 is equipped with a hydrogen generator 25 and an air inlet 26 with a filtering function, and can be automatically calibrated and automatically continuously measured according to detection needs.
Further, second sampling district 2 still can further include particulate matter sampling pipeline 27, waits to detect that tail gas flows into second sampling district 2 after, shunts to particulate matter sampling pipeline 27 and filter line 21, and particulate matter sampling pipeline is equipped with particulate matter sampling unit 28 and second dust filter 29 along tail gas flow direction in proper order, is equipped with flow valve 6 on the particulate matter sampling pipeline 27, and particulate matter sampling pipeline 27's output is connected with sampling pump 5. The particulate matter sampling unit 28 detects the content of particulate matter in the exhaust gas, and the second dust filter 29 filters the detected exhaust gas. The particle sampling unit 28 is connected with the data processing module 4, and the data processing module 4 obtains the detection result of the particle sampling unit 28.
In this embodiment, the second sampling area 2 may further include a buffer tank 20, and the buffer tank 20 is connected to the input end of the filtering line 21 and the input end of the particulate matter sampling line 27, respectively.
EXAMPLE III
As shown in fig. 3 to 4, in addition to the first or second embodiment, the vehicle exhaust gas component detection system may further include a third sampling area 3 for concentrated detection of several gases.
The third sampling area 3 comprises a centralized sampling pipeline 31, the centralized sampling pipeline 31 and NO2The output end of the sampling pipeline 11 is connected, and the output end of the centralized sampling pipeline 31 is connected with the sampling pump 5.
The centralized sampling pipeline 31 is sequentially provided with a second condenser 32 and a second infrared gas detection unit 33 along the tail gas flowing direction, the second condenser 32 is configured to condense the tail gas to be detected in the centralized sampling pipeline 31 to a second temperature, and in this embodiment, the second temperature is 4 ℃; the second infrared gas detection unit 33 is configured to simultaneously detect a plurality of gases including NO, CO, and CO2And the second infrared gas detection unit 33 is provided with a plurality of detection channels, one detection channel corresponds to the detection of one gas, the second infrared gas detection unit 33 is connected with the data processing module 4, and the data processing module 4 acquires the detection result of the second infrared gas detection unit 33. In this embodiment, the drain end of the second condenser 32 is connected to a peristaltic pump 7 for draining the condensed water.
Further, the centralized sampling pipeline 31 is further provided with an oxygen sensor 34, and the oxygen sensor 34 is arranged at the tail side of the second infrared gas detection unit 33 and is used for detecting the oxygen content in the tail gas.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalent changes may be made to some of the technical features of the embodiments. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A vehicle exhaust gas constituent detection system, comprising:
a first sampling region comprising NO2Sampling line, said NO2The sampling pipeline is provided with a first condenser and a first infrared gas detection unit in sequence along the tail gas flowing direction, and the first condenser is configured to convert NO into a gas2The tail gas to be detected in the sampling pipeline is condensed to a first temperature, and the first infrared gas detection unit is provided with a device for detecting NO in the tail gas2NO of2The device comprises a detection channel and a water detection channel for detecting gaseous water in tail gas; and
data processing modules, respectively associated with NO2The detection channel is electrically connected with the water detection channel to obtain NO in the tail gas2And the content of gaseous water.
2. The vehicle exhaust gas constituent detection system according to claim 1, wherein the NO is2The output end of the sampling pipeline is connected with a sampling pump, and NO2And a flow valve is arranged on the sampling pipeline.
3. The vehicle exhaust constituent detection system according to claim 1 or 2, characterized in that the first temperature is 25 ℃.
4. The vehicle exhaust constituent detection system according to claim 1, further comprising a second sampling area including a filter line, the filter line being in communication with NO2The sampling pipeline is communicated, and the filtering pipeline is provided with a first dust filter.
5. The vehicle exhaust component detection system according to claim 4, wherein the second sampling area further comprises a particulate matter sampling pipeline, and the particulate matter sampling pipeline is provided with a particulate matter sampling unit and a second dust filter in sequence along the exhaust gas flow direction.
6. The vehicle exhaust component detection system according to claim 5 wherein the second sampling area further comprises a buffer tank, the buffer tank being connected to an input of the filter line and an input of the particulate matter sampling line, respectively.
7. The vehicle exhaust gas composition detection system according to claim 4 or 6, wherein the second sampling area further comprises a hydrocarbon sampling line, the hydrocarbon sampling line is communicated with an output end of the filtering line, and the hydrocarbon sampling line is provided with a total hydrocarbon detection unit.
8. The vehicle exhaust gas constituent detection system according to claim 1, further comprising a third sampling area including a concentrated sampling line connected with NO2The output of sampling pipeline is connected, concentrated sampling pipeline is equipped with second condenser and the infrared gaseous detecting element of second along tail gas flow direction in proper order, the second condenser is configured to the tail gas condensation to the second temperature of waiting to detect in the concentrated sampling pipeline.
9. The vehicle exhaust gas constituent detection system according to claim 8, wherein the concentrated sampling line is further provided with an oxygen sensor.
10. The vehicle exhaust constituent detection system according to claim 8 or 9, characterized in that the second temperature is 4 ℃.
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| CN202120695758.7U CN213121586U (en) | 2021-04-07 | 2021-04-07 | Vehicle exhaust composition detecting system |
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| CN202120695758.7U CN213121586U (en) | 2021-04-07 | 2021-04-07 | Vehicle exhaust composition detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986070A (en) * | 2021-05-12 | 2021-06-18 | 西安多普多信息科技有限公司 | Tail gas detection device, method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986070A (en) * | 2021-05-12 | 2021-06-18 | 西安多普多信息科技有限公司 | Tail gas detection device, method and system |
| CN112986070B (en) * | 2021-05-12 | 2021-08-17 | 西安多普多信息科技有限公司 | Tail gas detection device, method and system |
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