激光技术, 2009, 33 (2): 130, 网络出版: 2010-02-28
机动车颗粒物的激光雷达监测
Monitoring for the particles emitted by vehicles with lidar
激光技术 激光雷达 最小二乘法 后向散射系数 气溶胶质量浓度 车流量 laser technique lidar least square method backscattering coefficient aerosol mass concentration traffic flow
摘要
为了用激光雷达遥测机动车排放颗粒物的浓度分布,从理论上分析了颗粒物后向散射系数和质量浓度之间的关系;利用激光雷达测量的后向散射系数以及黑碳仪测量的黑碳气溶胶质量浓度数据,采用最小二乘法对颗粒物后向散射系数与浓度以及后向散射系数与车流量之间进行了相关性分析。结果表明,激光雷达测量的后向散射系数能够很好地反演机动车颗粒物质量浓度,它们之间存在正比关系。激光雷达探测的气溶胶颗粒物浓度和车流量具有很好的一致性,可以用来研究机动车排放颗粒物的水平分布和扩散特性;这对于机动车的管理以及大气污染控制具有重要意义。
Abstract
In order to retrive the particles emitted by vehicles with lidar.Firstly,the relation between backscattering coefficient and mass concentration was studied in theory.Then based on the backscattering coefficient measured with lidar and aerosol mass concentration measured with aethalometer,the correlation between them and the correlation between the backscattering coefficient and vehicle flow are analyzed.Conclusions are drawn:it’s possible to inverse the backscattering coefficient into the mass concentration because of their linear relation.The horizontal distribution and scattering characteristics of the particles emitted by vehicles can be studied because the aerosol mass concentration is consistent with the vehicle flow.The results are useful for vehicles management and air pollution control.
张春光, 张玉钧, 韩道文, 刘文清, 陈臻懿. 机动车颗粒物的激光雷达监测[J]. 激光技术, 2009, 33(2): 130. ZHANG Chun-guang, ZHANG Yu-jun, HAN Dao-wen, LIU Wen-qing, CHEN Zhen-yi. Monitoring for the particles emitted by vehicles with lidar[J]. Laser Technology, 2009, 33(2): 130.