The Study And Design Of Vehicle Monitor System Based On GPS And GIS

GPS (Global Positioning System) was initiated and has been carried out in the United States of America. It was designed originally for the purpose of military service. Later with its development, GPS had also showed great potential in civil applications. In fact, due to its excellent positioning strategies - round the clock and over the earth service as well as its high accuracy, GPS has already been successfully and widely applied in such fields as navigation, aerospace, survey, monitoring and dispatchment of mobile vehicles. According to the market investigation of USGIC, the vehicle navigation will become the biggest application among GPS services in the coming twenty years.Geographic Information System (GIS) is a sort of special information system, which construct for acquire, store, inquire, analyse, display, and print the spatial data. It refers to geography, computer graphics, database technology, computer software, etc. With GIS, the user can inquire between the spatial data and the attribute data. GIS has display function, spatial analyse, management and aid of decision.The Automatic Vehicle Location System (AVL) has used most high technologies, such as GPS technology, GIS technology, wireless communication technology and computer technology etc. The AVL is composed of three parts, the Monitor Center (Base Station), the individual cars (Mobile Station), and the radio link which communicate between the BS and the MS. The BS's module sends the longitude, latitude, speed, and time information which read from GPS receiver and the car's state (such as alarm) via the radio. The BS will display the car's position in the map.This paper discuss the AVL system from three aspects, first present the design of the communicate controller, and then study the design of the communicate protocol, at last discuss the construction of the monitor center's manage system.This paper is made up of six chapters, and divides into three parts.1) In chapter 1 and chapter 2, we discuss the background and meaning of this task, and then introduce the AVL. The background and principle of GPS are discussed. At last present the mainly application of GPS.2) The design of AVL. This system has used most high technologies, such as GPS technology, geographic information system technology (GIS), wireless communication technology and computer technology etc. The key technology of AVL is discuss in detail, such as wireless communication technology and GIS technology.3) The prospect of AVL. In chapter 6, present the design idea of wandering and function expand of the MS according to the development of wireless communication.