高精度北斗车载差分定位装置的设计

基于ARM和嵌入式Linux,设计了一套高精度北斗车载差分定位装置系统。该装置由北斗差分定位模块、3G模块和S3C2440控制模块组成。装置通过Linux下串口通信以及NTRIP协议与连续运行卫星定位服务综合系统(CORS)进行数据的认证和传输,保证了定位数据的实时性与准确性。同时通过扩展卡尔曼滤波算法程序对定位数据进行后处理,进一步提高定位精度。该装置通过在实际道路上进行不同运动速度下定位精度的对比测试,定位精度满足交通运输等行业的需求,可促进交通运输等行业健康发展。

The Design of high accuracy differential positioning Beidou vehicle terminal

Based on ARM and embedded Linux, this research designed a high accuracy differential positioning Beidou vehicle terminal system which consists of Beidou differential positioning module, 3G module and S3C2440 control module. The terminal connects with continuously operating reference system (CORS) for data authorization and transmission through serial communication and NTRIP protocol, then the data is sent to positioning platform via TCP/IP. The whole process ensures the accuracy of real-time positioning data. Meanwhile, through the extended Kalman filter algorithm to process the processed data to improve the positioning accuracy. The terminal in actual road on the positioning precision of the contrast test under different speed, and the positioning accuracy satisfy the needs of transportation and other industries, it also promote the healthy development of transportation and other industries.