Monitoring for the particles emitted by vehicles with lidar

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 baekscattering 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.