文档介绍：摘要
近几年来,随着人民生活水平的日益提高,城市中的车辆日益增多,以及由此产生的交通阻塞、工作效率降低等问题也日趋严重;通过车载定位与监控系统,对市区内的车辆进行有效的指挥和监控,可以有效的缓解交通紧张状况,对合理的分配、调度资源、震慑针对于车辆的犯罪等都有着重要的意义。
本文首先对全球卫星定位系统(GPS)的定位技术进行了介绍,对GPRS移动通信系统及进行了论述,对ARM处理器进行了详细介绍,在此基础上,本文主要介绍车载监控终端研发中的两个方面的工作:
:介绍采用ARM7核的LPC2104的特性;GPS信号接收机的基本结构、主要功能、接口定义;GPRS模块的开发, Q2403模块的数据接口、数据传输形式、引脚功能及与LPC2104的接口设计作了相应的介绍;为满足各个芯片不同的电源要求设计电源电路;系统采用模拟总线技术扩充两个串口来弥补LPC2104的串口不足;用Flash来存储定位数据和监控中心发来的消息。
,包括红外电话拨号器,音频放大电路、LCD显示屏等的设计。另外对LCD软件体系结构和显示屏消息菜单也做了相应的介绍。
最后,对本文所设计的系统进行了一系列的GPS定位和定位信息的传输实验,并对外围设备进行测试,系统性能性能稳定,达到了设计要求。
关键词:全球定位系统;GPRS;车载监控;嵌入式操作系统
Abstract
In recent years, along with the level of people's life is increasing day by day, the city of increasing vehicle, and the resulting in a traffic jam, work productivity are yue is serious; Through the car positioning and monitoring system, the vehicle in the mand and control, can effectively relieve traffic emergencies, reasonable allocation of resources, scheduling, stunning based on the vehicle crime and so on, all have the important meaning.
This paper first to the global positioning system (GPS) positioning technology, introduces GPRS munication system and were discussed, on the ARM processor carried on the detailed introduction, based on this, this paper mainly introduces the on-board monitor terminal of the developing two aspects of work:
The core of the monitor terminal board hardware design: ARM7 introduced the characteristics of the nuclear LPC2104; GPS signal receiver of basic structure, main function, the interface definition; GPRS module development, for Q2403 module data interface, data transmission types, pin function and and LPC2104 interface design for the corresponding introduction; To meet the different requirements of each chip power supply power supply circuit design; By simulating system bus technology to make up for two serial port expansion LPC2104 serial port is insufficient; Use Flash to store positioning data and the monitoring cen