CN112485378A - Test platform of nitrogen oxygen sensor - Google Patents
Test platform of nitrogen oxygen sensor Download PDFInfo
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- CN112485378A CN112485378A CN202011338256.5A CN202011338256A CN112485378A CN 112485378 A CN112485378 A CN 112485378A CN 202011338256 A CN202011338256 A CN 202011338256A CN 112485378 A CN112485378 A CN 112485378A
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- 238000012360 testing method Methods 0.000 title claims abstract description 41
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 203
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004202 carbamide Substances 0.000 claims abstract description 21
- 239000013589 supplement Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 16
- 230000001502 supplementing effect Effects 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 238000000746 purification Methods 0.000 abstract description 22
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 51
- 235000019391 nitrogen oxide Nutrition 0.000 description 17
- 229960003753 nitric oxide Drugs 0.000 description 15
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/007—Arrangements to check the analyser
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/007—Arrangements to check the analyser
- G01N33/0072—Arrangements to check the analyser by generating a test gas
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Of Engines (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a test platform of a nitrogen-oxygen sensor, which comprises a gas generation unit, a gas mixing cavity and a purification gas cavity. The gas generation unit comprises a tail gas generation mechanism and a gas supplement mechanism, the tail gas generation mechanism and the gas supplement mechanism are both connected with the gas mixing cavity, the tail gas generation mechanism conveys tail gas into the gas mixing cavity, and the gas supplement mechanism conveys supplement gas into the gas mixing cavity, so that the actual environment of the tail gas is simulated. A first conveying pipeline for conveying tail gas is arranged between the gas mixing cavity and the gas purifying cavity, and the first conveying pipeline is connected with a first sensor station. The purification air cavity is connected with a urea pump, and the urea pump conveys urea liquid to the purification air cavity to purify tail gas. The purification air cavity is also connected with a second conveying pipeline for conveying the purified tail gas, and the second conveying pipeline is connected with a second sensor station. The first sensor station and the second sensor station are respectively provided with a first sensor and a second sensor, and the first sensor and the second sensor respectively detect the tail gas before and after purification.
Description
Technical Field
The invention relates to the technical field of sensor testing, in particular to a testing platform of a nitrogen-oxygen sensor.
Background
The national requirements for atmospheric environment protection are higher and higher, and the national six standards of automobiles, namely DB11/1476 heavy-duty automobile nitrogen oxide rapid detection method and emission limit, are established on the basis of the national five standards which are already implemented. According to the national standard requirements, all diesel vehicles gradually use the vehicle intelligent nitrogen oxide sensor to detect the concentration of the nitrogen oxide in the tail gas of the vehicle, such as N2O、NO、NO2、N2O3、N2O4And N2O5Equal Nitrogen Oxides (NO)x) And (4) content, and the urea solution for spraying the vehicle can eliminate nitrogen oxide pollution.
The nitrogen oxide sensor detects the concentration of nitrogen oxide gas in the tail gas by adopting an electrochemical method. The national standard also gives a measurement accuracy requirement on the exhaust emission, so that the precision calibration and the test are required to be specially performed on the nitrogen oxide sensor. The tail gas actual environment can not be correctly simulated in the calibration and test in the current production process of the nitrogen-oxygen sensor, so that the product quality is unreliable, the test time is longer, and the efficiency is low.
Therefore, how to improve the accuracy and efficiency of the test is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a test platform of a nitrogen-oxygen sensor, which is used for generating gas to be conveyed to a gas mixing cavity through a gas generating unit so as to simulate the actual environment of tail gas and enable the test result to be more accurate.
In order to achieve the purpose, the invention provides a test platform of a nitrogen-oxygen sensor, which comprises a gas generation unit, a gas mixing cavity and a purification air cavity, wherein the gas generation unit comprises a tail gas generation mechanism and a gas supplement mechanism, the tail gas generation mechanism is connected with the gas mixing cavity and conveys tail gas into the gas mixing cavity, the gas supplement mechanism is also connected with the gas mixing cavity and conveys supplement gas into the gas mixing cavity, a first conveying pipeline for conveying tail gas is arranged between the gas mixing cavity and the purification air cavity, the first conveying pipeline is connected with a first sensor station, the purification air cavity is connected with a urea pump for conveying urea liquid for purifying tail gas, the purification air cavity is further connected with a second conveying pipeline for conveying purified tail gas, and the second conveying pipeline is connected with a second sensor station.
Preferably, the device further comprises a controller, and the tail gas generating mechanism, the gas supplementing mechanism and the urea pump are all connected with the controller.
Preferably, the system further comprises a first communication module used for connecting the first sensor and a second communication module used for connecting the second sensor, and the first communication module and the second communication module are both connected with the controller.
Preferably, the second conveying pipeline is further connected with a nitrogen and oxygen detection analyzer for detecting tail gas, and the nitrogen and oxygen detection analyzer is connected with the controller.
Preferably, the gas generating unit is an engine, and a tail gas pipe of the engine is connected with the gas mixing cavity.
Preferably, the number of the first sensor stations and the number of the second sensor stations are both more than 2.
Preferably, the gas supplementing mechanism comprises a first gas source for supplementing nitrogen or air, the first gas source is connected with the gas mixing cavity through a first gas conveying pipe, the first gas source is provided with a first regulating valve, a first pressure gauge, a first flow meter and a first one-way valve are arranged in the first gas conveying pipe, and the first regulating valve, the first pressure gauge and the first flow meter are all connected with the controller.
Preferably, the gas supplementing mechanism further comprises a second gas source for supplementing nitrogen-oxygen mixed gas, the second gas source is connected with the gas mixing cavity through a second gas conveying pipe, the second gas source is provided with a second regulating valve, a second pressure gauge, a second flowmeter and a second one-way valve are arranged in the second gas conveying pipe, and the second regulating valve, the second pressure gauge and the second flowmeter are connected with the controller.
Preferably, an exhaust gas processor for purifying the exhaust gas is connected to the end of the second conveying pipeline.
The test platform of the nitrogen-oxygen sensor provided by the invention comprises a gas generation unit, a gas mixing cavity and a purification gas cavity. The gas generation unit comprises a tail gas generation mechanism and a gas supplement mechanism, the tail gas generation mechanism and the gas supplement mechanism are both connected with the gas mixing cavity, the tail gas generation mechanism conveys tail gas into the gas mixing cavity, and the gas supplement mechanism conveys supplement gas into the gas mixing cavity, so that the actual environment of the tail gas is simulated. A first conveying pipeline for conveying tail gas is arranged between the gas mixing cavity and the gas purifying cavity, and the first conveying pipeline is connected with a first sensor station. The purification air cavity is connected with a urea pump, and the urea pump conveys urea liquid to the purification air cavity to purify tail gas. The purification air cavity is also connected with a second conveying pipeline for conveying the purified tail gas, and the second conveying pipeline is connected with a second sensor station. The first sensor station and the second sensor station are respectively provided with a first sensor and a second sensor, and the first sensor and the second sensor respectively detect the tail gas before and after purification.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a platform for testing a NOx sensor according to the present invention.
Wherein the reference numerals in fig. 1 are:
the device comprises a gas mixing cavity 1, a purification gas cavity 2, an exhaust gas processor 3, an engine 4, a urea pump 5, a nitrogen-oxygen detection analyzer 6, a first sensor station 7, a second sensor station 8, a first gas source 9, a second gas source 10, a controller 11, a first pressure gauge 12, a first flowmeter 13, a first one-way valve 14, a second pressure gauge 15, a second flowmeter 16, a second one-way valve 17, a first communication module 18 and a second communication module 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a testing platform of a nitrogen oxygen sensor according to the present invention.
The test platform of the nitrogen oxygen sensor provided by the invention comprises a gas generation unit, a gas mixing cavity 1 and a purification gas cavity 2 as shown in figure 1. The gas generating unit is used for generating gases such as tail gas, nitrogen-oxygen mixed gas and the like, and conveying the gases to the gas mixing cavity 1 for mixing, and the gases in the gas mixing cavity 1 are close to the actual environment of the tail gas. The gas generating unit comprises a tail gas generating mechanism and a gas supplementing mechanism, the tail gas generating mechanism can be specifically an engine 4, a tail gas pipe of the engine 4 is connected with the gas mixing cavity 1, and tail gas generated by fuel combustion of the engine 4 is conveyed into the gas mixing cavity 1. In one embodiment of the present application, the engine 4 is a diesel engine 4, but the user may use a gasoline engine 4 as needed. The gas supplementing mechanism is also connected with the gas mixing cavity 1 and supplies supplementary gas such as nitrogen-oxygen mixed gas or air to the gas mixing cavity 1. The gas mixing cavity 1 is communicated with the gas purifying cavity 2 through a first conveying pipeline. The first conveying pipeline is connected with a first sensor station 7, a first sensor for detecting tail gas before purification can be installed in the first sensor station 7, and gas flow passes through a probe of the first sensor, so that gas detection is completed. The purification air cavity 2 is connected with a urea pump 5, specifically, a nozzle is arranged in the purification air cavity 2, the urea pump 5 is connected with the nozzle, and urea liquid pressurized by the urea pump 5 is sprayed into the purification air cavity 2 through the nozzle. The atomized urea solution can react with the nitrogen oxide in the purification air cavity 2 to reduce the nitrogen oxide into nitrogen and water, thereby achieving the purpose of purifying the tail gas. The purification air cavity 2 is also connected with a second conveying pipeline, and the second conveying pipeline is used for conveying the purified tail gas. The second conveying pipeline is connected with a second sensor station 8, a second sensor can be installed on the second sensor station 8, and the air flow passes through a probe of the second sensor, so that the detection of the purified gas is completed.
Optionally, in order to improve the testing efficiency of the nitrogen oxygen sensor, the number of the first sensor stations 7 and the number of the second sensor stations 8 in the testing platform of the nitrogen oxygen sensor are more than 2. In the specific embodiment shown in fig. 1, the number of the first sensor stations 7 and the number of the second sensor stations 8 are both 6, but the number of the first sensor stations 7 and the number of the second sensor stations 8 may also be set by a user according to needs, and is not limited herein.
Optionally, the test platform of the nitrogen oxygen sensor further includes a controller 11, the tail gas generation mechanism, the gas supplement mechanism and the urea pump 5 are all connected with the controller 11, the controller 11 controls the rotating speed of the engine 4, the spraying amount of the urea solution, the gas supplement amount and the like according to test requirements, and the controller 11 may be a computer, an industrial personal computer, a single chip microcomputer or a PLC controller 11 and the like, which is not limited herein.
Optionally, the gas replenishment mechanism includes a first gas source 9 for replenishing nitrogen or air. Specifically, the first gas source 9 may be a pure nitrogen gas bottle with a pressure reducing valve or a compressed air bottle. The first air source 9 is connected with the air mixing cavity 1 through a first air conveying pipe, and the first air source 9 is also provided with a first regulating valve. The first gas pipe is provided with a first pressure gauge 12, a first flow meter 13 and a first one-way valve 14. The first regulator valve, the first pressure gauge 12 and the first flow meter 13 are all connected to the controller 11. The controller 11 acquires the flow rate of nitrogen or air based on the first pressure gauge 12 and the first flow meter 13, and adjusts the gas flow rate through the first check valve 14.
Optionally, the gas supplementing mechanism further includes a second gas source 10 for supplementing a nitrogen-oxygen mixed gas, where the nitrogen-oxygen mixed gas is a nitrogen-oxide mixed gas. The second air source 10 is connected with the air mixing chamber 1 through a second air conveying pipe, the second air source 10 is provided with a second regulating valve, the second regulating valve is connected with the controller 11, and the air supplementing quantity is regulated according to a control instruction of the controller 11. The controller 11 realizes nitrogen and oxygen supplementation with different concentration values according to the gas requirements with different concentrations in the test. The second gas transmission pipe is provided with a second pressure gauge 15, a second flowmeter 16 and a second one-way valve 17, and the second pressure gauge 15 and the second flowmeter 16 are also connected with the controller 11. The controller 11 receives feedback signals from the second pressure gauge 15 and the second flow meter 16 to cause the regulation process to form a closed loop.
Optionally, the platform for testing a nitrogen oxygen sensor further includes a first communication module 18 and a second communication module 19, where the first communication module 18 is used to connect the controller 11 and the first sensor, and the second communication module 19 is used to connect the controller 11 and the second sensor. The first communication module 18 and the second communication module 19 CAN adopt CAN analyzers which CAN transmit standard automobile CAN bus communication protocols to complete data interaction between the controller 11 and the nitrogen oxygen sensor
Optionally, the second conveying pipeline is further connected with a nitrogen and oxygen detection analyzer 6 for detecting the tail gas, and the nitrogen and oxygen detection analyzer 6 is connected with the controller 11. The nitrogen oxide detection analyzer 6 can accurately measure the concentration value of nitrogen oxide, thereby providing a standard value reference for the detection result. The controller 11 compares the detection result of the nitrogen oxide detection analyzer 6 with the detection result of the nitrogen oxide sensor to determine whether the detection result of the nitrogen oxide sensor is accurate.
The end of the second conveying pipeline is connected with an exhaust gas processor 3 for purifying the tail gas. The exhaust gas processor 3 can convert harmful gases such as carbon monoxide, hydrocarbons and nitrogen oxides in the exhaust gas into harmless carbon dioxide, water and nitrogen by oxidation-reduction. Thereby avoiding air pollution caused in the testing process.
In this embodiment, the test platform of the nitrogen oxygen sensor delivers gas to the gas mixing chamber 1 through the engine 4, the first gas source 9 and the second gas source 10, so that the gas in the gas mixing chamber 1 is closer to the actual environment of the tail gas, thereby ensuring that the test result is more accurate. Meanwhile, a test platform of the nitrogen oxygen sensor is provided with a plurality of sensor installation stations, so that the test of a plurality of nitrogen oxygen sensors can be completed through one-time test, and the test efficiency is improved. And tail gas generated in the test is subjected to harmless treatment through a tail gas treater, so that air pollution caused in the test process is avoided.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The above description provides a detailed description of the platform for testing the nitrogen oxygen sensor provided by the invention. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A test platform of a nitrogen-oxygen sensor is characterized by comprising a gas generation unit, a gas mixing cavity (1) and a purified gas cavity (2), wherein the gas generation unit comprises a tail gas generation mechanism and a gas supplement mechanism, the tail gas generation mechanism is connected with the gas mixing cavity (1) and conveys tail gas into the gas mixing cavity (1), the gas supplement mechanism is also connected with the gas mixing cavity (1) and conveys supplement gas into the gas mixing cavity (1), a first conveying pipeline for conveying tail gas is arranged between the gas mixing cavity (1) and the purified gas cavity (2), the first conveying pipeline is connected with a first sensor station (7), the purified gas cavity (2) is connected with a urea pump (5) for conveying urea liquid for purifying the tail gas, and the purified gas cavity (2) is also connected with a second conveying pipeline for conveying the purified tail gas, the second conveying pipeline is connected with a second sensor station (8).
2. The testing platform according to claim 1, further comprising a controller (11), wherein the exhaust gas generating means, the gas supplementing means and the urea pump (5) are all connected to the controller (11).
3. The test platform according to claim 2, further comprising a first communication module (18) for connecting a first sensor and a second communication module (19) for connecting a second sensor, wherein the first communication module (18) and the second communication module (19) are both connected to the controller (11).
4. The test platform according to claim 2, wherein the second conveying pipeline is further connected with a nitrogen and oxygen detection analyzer (6) for detecting the tail gas, and the nitrogen and oxygen detection analyzer (6) is connected with the controller (11).
5. Test platform according to claim 2, characterized in that the gas generating unit is an engine (4), the exhaust pipe of the engine (4) being connected to the gas mixing chamber (1).
6. Test platform according to claim 2, characterized in that the first sensor station (7) and the second sensor station (8) are each more than 2.
7. The test platform according to any one of claims 2 to 6, wherein the gas supplementing mechanism comprises a first gas source (9) for supplementing nitrogen or air, the first gas source (9) is connected with the gas mixing chamber (1) through a first gas pipe, the first gas source (9) is provided with a first regulating valve, the first gas pipe is provided with a first pressure gauge (12), a first flow meter (13) and a first one-way valve (14), and the first regulating valve, the first pressure gauge (12) and the first flow meter (13) are all connected with the controller (11).
8. The test platform according to any one of claims 2 to 6, wherein the gas supplementing mechanism further comprises a second gas source (10) for supplementing a nitrogen-oxygen mixed gas, the second gas source (10) is connected with the gas mixing cavity (1) through a second gas pipe, the second gas source (10) is provided with a second regulating valve, the second gas pipe is provided with a second pressure gauge (15), a second flow meter (16) and a second one-way valve (17), and the second regulating valve, the second pressure gauge (15) and the second flow meter (16) are all connected with the controller (11).
9. Test platform according to any of claims 1 to 6, characterized in that the second transport line is connected at its end to an exhaust gas processor (3) for purifying the exhaust gases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011338256.5A CN112485378A (en) | 2020-11-25 | 2020-11-25 | Test platform of nitrogen oxygen sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011338256.5A CN112485378A (en) | 2020-11-25 | 2020-11-25 | Test platform of nitrogen oxygen sensor |
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| CN112485378A true CN112485378A (en) | 2021-03-12 |
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| CN202011338256.5A Pending CN112485378A (en) | 2020-11-25 | 2020-11-25 | Test platform of nitrogen oxygen sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118112185A (en) * | 2024-04-28 | 2024-05-31 | 浙江昕宸科技有限公司 | Nitrogen-oxygen sensor performance testing device for automobile |
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| CN207081704U (en) * | 2017-03-28 | 2018-03-09 | 常州联德电子有限公司 | A kind of nitrogen oxide sensor evaluating system |
| CN108007699A (en) * | 2017-12-28 | 2018-05-08 | 清华大学 | A kind of modular pollutant of vehicle exhaust on-board emission test platform |
| CN110988271A (en) * | 2019-12-27 | 2020-04-10 | 厦门通创检测技术有限公司 | Vehicle-mounted emission detection device |
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2020
- 2020-11-25 CN CN202011338256.5A patent/CN112485378A/en active Pending
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| CN207081704U (en) * | 2017-03-28 | 2018-03-09 | 常州联德电子有限公司 | A kind of nitrogen oxide sensor evaluating system |
| CN108007699A (en) * | 2017-12-28 | 2018-05-08 | 清华大学 | A kind of modular pollutant of vehicle exhaust on-board emission test platform |
| CN110988271A (en) * | 2019-12-27 | 2020-04-10 | 厦门通创检测技术有限公司 | Vehicle-mounted emission detection device |
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| 罗志安 等: "氧化锆氧传感器的发动机台架测试", 《研究与开发 》 * |
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| CN118112185A (en) * | 2024-04-28 | 2024-05-31 | 浙江昕宸科技有限公司 | Nitrogen-oxygen sensor performance testing device for automobile |
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