基于GPRS的北斗高精度定位车载系统

Beidou High Precision Positioning Vehicle Based on GPRS System

现有常用车载定位终端定位精度低,无法定位至车道。利用RTK技术设计出一套车载系统,实现厘米级高精度定位;介绍常规单点定位误差的来源及消除误差的RTK技术;研究车载系统可行性方案,阐述系统的硬件设计及各个模块功能,阐明系统软件设计逻辑及流程控制,介绍系统中处理的数据帧格式及内容,设计实验测试车载系统的性能并给出测试结果。实验表明,车载系统的圆概率误差CEP可以达到0. 8 cm,实现了车辆的厘米级定位。

The existing common vehicle positioning temfinals have low positioning accuracy and cannot be posi- tioned in the lane. RTK technology is used to design a vehicle -mounted system to achieve centimeter -level high - precision positioning. The source of conventional single - point positioning error and the RTK technique to eliminate the error are introduced. The feasibility of the on - board system is studied. The hardware design of the system and the functions of each module am described. The logic and flow control of the system software am clarified, and the processing in the system is introduced. The fomlat and content of the data frame am designed to test the peffomlance of the on - board system and give test results. Experiments have shown that the CEP of the on - vehicle system can roach 0. 008 meters, achieving centimeter - level positioning of the vehicle.