基于GPS＼BD2组合的车载导航系统性能分析

摘要

The independent development of China’s BeiDou navigation system has already covered the Asia‐Pacific region .To study the performance accuracy of BeiDou system‐based vehicle navigation technology , this paper uses pseudo range single point positioning method to analyze their two‐dimensional positioning accuracy of three navigation modes GPS ,BD2 ,and GPSBD2 .The results show that accuracy shows 3.66 m ,4.76 m ,3.01 m ,of w hich the positioning accuracy of BeiDou navigation system based on single point positioning has reached 5 m inside , fully meetting the public daily travel requirements . And compared with GPS navigation system , the combined system has higher precision , so it’ s the best navigation mode .Besides ,writing positioning software based on visual studio platform ,can be used to extract the vehicle position and speed information to monitor w hether the vehicle exceed the speed limit .%中国独立发展的北斗系统已经具备亚太地区的定位导航能力，为研究以北斗系统为主的车载导航技术的应用精度，采用伪距单点定位的方法分别对车载GPS ，BD2，GPS＼BD23种导航模式下的二维导航精度进行对比分析，结果显示定位精度分别为：3.66m，4.76m，3.01m，可以看出基于单点定位的北斗二维平面导航精度已达到5m内，完全满足大众日常的出行要求。组合系统与GPS导航系统对比，组合系统具有更高的精度，是较好的导航模式。并基于visual studio平台编写定位软件，实现对车辆位置和速度信息的提取，监控车辆是否超速。