基于GPS和CDMA的物流车辆监控终端的设计

摘要

近年来物流行业发展迅速,提出了一种基于GPS(全球定位系统)和CDMA(码分多址)技术的物流车辆监控终端的设计方案.采用S3C2440A ARM芯片作为主控芯片,选取合适的GPS模块和CDMA模块进行硬件设计.研究分析了GPS和CDMA技术.在WinCE 5.0平台上设计了GPS串口接收程序,以及终端与监控中心的无线通信程序.结果表明,本系统运行稳定,数据刷新时间小于3 s,GPS位置漂移值小于20 m.%In recent years the logistics industry had developed rapidly, a design for logistics vehicle monitoring terminal based on GPS (Global Positioning System) and CDMA (Code Division Multiple Access) technology was presented in this paper. The S3C2440A ARM chip was used as the main chip, and appropriate GPS module and CDMA module were selected for the hardware design. This paper analyzed the technology of GPS and CDMA and designed GPS serial port receiver program in WinCE 5.0 platform, as well as the wireless communication program between the terminal and the logistics center. The result shows that the system is stable, the time of data refresh is less than 3s, the value of GPS position drift is less than 20m.