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Proceedings Paper

Design of the NDUV detection circuit for the NO concentration of the vehicle exhaust emissions
Author(s): Kai Zhang; Yujun Zhang; Ying He; Kun You; Yanwei Gao; Chen Chen; Guohua Liu; Chungui He; Yibing Lu; Wenqing Liu
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Paper 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.

Paper Details

Date Published: 25 October 2016
PDF: 13 pages
Proc. SPIE 10156, Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology, 101560E (25 October 2016); doi: 10.1117/12.2244559
Show Author Affiliations
Kai Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Yujun Zhang, Anhui Institute of Optics and Fine Mechanics (China)
Ying He, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Kun You, Anhui Institute of Optics and Fine Mechanics (China)
Yanwei Gao, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Chen Chen, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Guohua Liu, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Chungui He, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Yibing Lu, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Wenqing Liu, Anhui Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 10156:
Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology

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