基于GPS/GPRS的车载卫星定位系统的研究

In-vehicle Global Positioning System Based on GPS/GPRS

根据现代智能交通系统的实际需求,设计了一种基于GPRS的车载卫星定位系统,系统采用单片机作为处理器,通过GPRS网络建立无线通信链路,把车载移动终端的GPS定位信息传到Internet网上的服务器,实现在线实时监测车辆行驶各类信息;详细阐述了车载定位系统的工作原理和车载终端系统硬件设计,介绍了单片机软件编程以及PPP,TCP/IP等协议栈的建立,实际运行结果表明,系统达到设计要求,实现了控制中心实时监测车辆行驶状态,加强了企业对车辆的监控和管理。

According to the need of Intelligent Transportation System （ITS）, an in vehicle GPS system is introduced based on GPRS network. The processor of this system is singlechip. The system uses GPRS network to create wireless link , and it transmit GPS informa lion from in-vehicle terminal to the centre controller on the internet. In this way , the system can locate vehicles. The paper introduces the principle of location system , and analyses the hard ware＇of the system. It also introduces the software and the PPP , TCP/IP protocol, The running result shows that the real time control of the vechile is realized and vechile management is enhanced.