Research on influence characteristics of NOx measurement accuracy in vehicle exhaust

Guohua Liu; Yujun Zhang

doi:10.1117/12.2639302

29 April 2022 Research on influence characteristics of NOx measurement accuracy in vehicle exhaust

Guohua Liu, Yujun Zhang

Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 122551B (2022) https://doi.org/10.1117/12.2639302
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China

Abstract

NOX emitted by diesel vehicles is an important source of atmospheric pollution. Accurate detection of diesel vehicle emissions is crucial for law enforcement agencies to formulate effective emission reduction measures. In order to improve the measurement accuracy of NOX, the main gaseous pollutant in the exhaust system of heavy-duty diesel vehicles under the national V standard, based on the non-dispersive ultraviolet absorption method (NDUV), a portable on-board emission analysis system (PEMS) was used to do the actual on-road emissions testing of the heavy-duty diesel vehicles in the national V emission stage. At the same time, the electrochemical method was used to carry out comparative experiments. The results showed that, although the temperature changed in a large range during vehicle operation, it did not affect the sensor's measurement of NOX concentration, and the change in humidity would affect the NO measurement result to a certain extent.

Citation Download Citation

Guohua Liu and Yujun Zhang "Research on influence characteristics of NOx measurement accuracy in vehicle exhaust", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 122551B (29 April 2022); https://doi.org/10.1117/12.2639302

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