Remote sensing CO, CO<sub>2</sub> in vehicle emissions based on TDLAS

Tiedong Wang; Wenqing Liu; Yujun Zhang; Jianguo Liu; Fengzhong Dong; Min Wang; Xiaomei Wang; Min Xu

doi:10.1117/12.693658

10 June 2006 Remote sensing CO, CO₂ in vehicle emissions based on TDLAS

Tiedong Wang, Wenqing Liu, Yujun Zhang, Jianguo Liu, Fengzhong Dong, Min Wang, Xiaomei Wang, Min Xu

Proceedings Volume 6344, Advanced Laser Technologies 2005; 634425 (2006) https://doi.org/10.1117/12.693658
Event: Advanced Laser Technologies 2005, 2005, Tianjin, China

Abstract

Knowing the quantity of pollutants that the vehicle fleet is emitting to the air has become a vital question in almost every major city in China. Finding and fixing gross polluters is therefore very important to control the urban air quality and protect the human health and the environment. Remote sensing is an important advance in the technology of on-road vehicle emissions testing because it is fast, mobile, and unobtrusive. This on-road vehicle emissions remote system is designed to measure the carbon monoxide, carbon dioxide and opacity from the vehicles's tailpipe based on the Tuneable Diode Laser Absorption Spectroscopy (TDLAS). There are several advantages of this system such as compact design and ease of use. The measurement principle and optical layout of the instrument has been described in this paper. Field testing at Beijing and Hefei were conducted over one year, more than 6000 vehicles were tested. This vehicle emissions remote system has been shown to be able to measure CO,CO₂ and opacity from individual at highway speeds. In parallel, the plate license, speed, acceleration and length of vehicle are recognised by computer so that the owners of vehicles exceeding the permissible level of emissions can be identified.

Citation Download Citation

Tiedong Wang, Wenqing Liu, Yujun Zhang, Jianguo Liu, Fengzhong Dong, Min Wang, Xiaomei Wang, and Min Xu "Remote sensing CO, CO₂ in vehicle emissions based on TDLAS", Proc. SPIE 6344, Advanced Laser Technologies 2005, 634425 (10 June 2006); https://doi.org/10.1117/12.693658

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