The Supervision Terminal System Of Vehicle GPS Based On ARM9

Intelligent Transportation System is a comprehensive transportation management system with real time response, high accuracy and efficiency, which is based on the development of information technology, wireless communication, sensor technology and computer science. As an important part of ITS, the embedded vehicle supervision system fulfills real time communication and data interaction between supervision center and vehicle terminal.In this thesis, the embedded vehicle GPS supervision system based on GPS position technology, GSM/GPRS wireless network and embedded system is studied. The embedded terminal based on ARM9 processor is designed to receive real time position information from GPS satellite and interact with the supervision center by wireless communication. By this intelligent terminal, the mobile vehicle can be positioned, traced and controlled remotely by the transportation supervision center.The embedded vehicle GPS supervision system is composed of supervision center, wireless network and embedded vehicle terminal. It focuses on the following aspects:Firstly, the system framework is designed and introduced according to functions requirements and working principle of GPS and GSM/GPRS. Based on the hardware platform and communication module, the embedded Linux operating system is ported and the device drivers are implemented to realize the interaction between application software and hardware module.Secondly, the upper layer application software is designed and implemented to realize wireless supervision of the vehicle terminal. Mainly aiming at the data process of GPS and network link and data transaction of GPRS, the software program is implemented to realize the interaction between supervision center and vehicle terminal. Besides, the multimedia broadcasting is implemented based on a special commercial device.In the end, large amount of module unit test and system integration test cases are designed to guarantee the stability and reliability of the embedded terminal system.