The Design of High Accuracy Differential Positioning Vehicle Terminal Based on BeiDou Navigation System

Vehicle monitoring systems have recently become a urgent necessity. This paper describes a high accuracy differential positioning vehicle terminal based on BeiDou Navigation System, comprised of a BeiDou differential positioning module, a GPRS communication module, and a S3C 2440A control module. This vehicle terminal can perform realtime data acquisition and storage, and the information can be displayed through a human-machine interface. The software design hinges on the storage of data processing, which uses the extended Kalman filtering algorithm to process the processed data to improve the positioning accuracy. The experimental results show that the terminal can achieve high-precision positioning, and the positioning accuracy meets the needs of transportation and other industries.