| Global Positioning System of vehicles, also known as auto vehicles locating system, is researched starting off in 1960s. The propose of study is to find a solutiong for the heavy traffic issues in big city caused by the cilivizationg of automobiles. Nowadays, auto vehicles locating is composed of GPS, wireness communication, GIS. It is not only essential part of intelligent transportion system, but also providing grand against theft, grand against highjack, medical emergence and so forth.The embedded vehicle monitoring system is the important part of auto vehicles locating system, in this thesis, the concept of embedded system is applied to auto vehicles locating system.First,give a holistic design,include the composed design,the function design and the key technology of system.Compare various method of orientation and GPS served as the method.Capital theory of GPS is introduced in this thesis.GPRS is selected for the communication.Second,the terminal is designed.In this part,the selection for the main controller,the character of the main controller,the orientation module,the communication module. Especially, expound the principle of the communication, the frame of the control circuit,the design of collection for simulation/swich.At last,introduce the design of software.the replant of the the embedded vehicle monitoring and the drive of hardware is introduced.The latter include GPS,GPRS,the flash memory. Carve off the task of system and Establish the communication protocol. |
