移动式路面尘负荷测试系统及应用

建立了一种移动测试系统能够快速得出路面尘负荷,并结合GPS仪显示路面尘负荷的空间分布。在车辆顶部和车轮后部分别安装颗粒物浓度测试仪逐秒测试2点的PM10浓度,浓度差记为c,同时利用测试逐秒的经纬度信息和车速。根据AP-42标准方法采集分析了典型道路的尘负荷,建立了路面尘负荷、车速和浓度差之间的函数关系为sL=9.89.C0.810.e-0.068s。根据测试数据得出了呼和浩特市典型道路的尘负荷空间分布,从空间分布结果结合现场调查数据可以看出,施工活动较多的区域路面尘负荷较高,路面破损和两侧有未铺装区域的路面尘负荷较高,为道路扬尘控制提供参考。

Spatial Distributions of Road Silt Loading Based on Mobile Monitoring System

A new approach for measuring silt loading was introduced and the system was set up,when coupled with a Global Positioning System(GPS) can survey silt loading and indicate spatial distribution.Real-time aerosol sensors were mounted on a vehicle to measure the concentration of dust suspended from the road while the vehicle is in motion.Results indicated that the difference of PM10 concentrations measured behind the tire and on the hood(C) is exponentially related to vehicle speed.The GPS provides a highly accurate method of obtaining real-time position,vehicle speed information and consists of a portable device that receives signals broadcast by at least four different satellites.Silt loading of typical roads were sampled and analyzed according to AP-42 method,the relationship of silt loading,vehicle speed and concentrations difference(C) was sL=9.89·C 0.810·e-0.068s.The silt loading spatial distribution in Hohhot city area was mapped using the system,the results showed that silt loading is higher for the area of construction sites,the disrepair roads and roads with unpaved shoulders.