无线定位技术应用于实时交通信息采集研究

研究基于无线定位的浮动车实时交通信息采集技术,构建由无线定位、地图匹配和交通信息获取组成的技术框架.以较高定位精度和实用性为原则,指出TDOA,A-GPS和GPSOne是适合于交通信息采集的无线定位技术,推导其定位方程.研究了点到点、点到线和线到线的地图匹配技术,给出相关算法.提出单路段和多路段情形的平均旅行时间和平均速度的估计算法,采用统计学方法研究置信区间和样本容量.

Real-time traffic information collection using wireless location technology

With probe vehicles using wireless location technology,the real-time traffic information collection was explored. The framework was consists of wireless location,map matching,and traffic information collection. According to the principles of high location precision and practicability,three location ways,including time difference of arrival,assisted global positioning system,and GPSOne,were identified for traffic information collection. Their location equations were established. The algorithms were studied and developed for map matching of point to point,point to line,and line to line. Furthermore,the estimation methods for average travel time and speed were developed for the single link and multiple links. Moreover,the related confidence level and sample size were presented using statistics methods.