25 October 2016 Design of the NDUV detection circuit for the NO concentration of the vehicle exhaust emissions
Author Affiliations +
Proceedings Volume 10156, Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology; 101560E (2016) https://doi.org/10.1117/12.2244559
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
With the increasing number of vehicles, the harm from NO to the environment becomes more and more prominent. So the monitoring of the NO concentration of the vehicle exhaust emissions is very important to assess the emission levels. In this paper, the NO detection system designing for vehicle exhaust emissions based on the non-dispersive ultraviolet principle (NDUV) has been researched. The technical indexes of the two-way modulation UV signal detection circuit are discussed in detail. And then a precision detection circuit is designed, which is composed of a trans-impedance amplifier and a lock-in amplifier, with which the output of the UV photoelectric detector can be amplified to a suitable voltage range, and the DC noise of the pre-stage amplifier is effectively removed by the lock-in amplifier. An experimental system was set up to test the designed circuit. To ensure the consistency of the two channels, the method of exchange calibration was adopted in the test. It’s drawn that the designed circuit is of high SNR, measuring accuracy and a large dynamic range from the test results. The NO concentration detection limit of vehicle emissions can reach 1ppm, and the detection precision is ±15ppm.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kai Zhang, Kai Zhang, Yujun Zhang, Yujun Zhang, Ying He, Ying He, Kun You, Kun You, Yanwei Gao, Yanwei Gao, Chen Chen, Chen Chen, Guohua Liu, Guohua Liu, Chungui He, Chungui He, Yibing Lu, Yibing Lu, Wenqing Liu, Wenqing Liu, } "Design of the NDUV detection circuit for the NO concentration of the vehicle exhaust emissions", Proc. SPIE 10156, Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology, 101560E (25 October 2016); doi: 10.1117/12.2244559; https://doi.org/10.1117/12.2244559
PROCEEDINGS
13 PAGES


SHARE
Back to Top