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In recent years, with the popularization of cars and the construction of roads, the economical intercourse among cities becomes more frequent and the region of area that people moved is broader than ever, which produce many serious problems, such as traffic jam, traffic accident increasing, emissions increasing and so on. The appearance of intelligent transport system (ITS) can effectively improve those problems and bring convenient service to people. As a branch of ITS, vehicles supervisory system integrates wireless location technology, geography information system (GIS), modern communication technology and embedded system. It is not only the essential part of ITS, but also providing grand against theft, grand against highjack, medical emergence, entertainment and so forth. By analyzing the problems in traditional GPS in vehicle supervision system, a vehicle terminal solution applying GPSOne position-location technology is proposed.First, the positioning principle, working pattern, network architecture of GPSone are summarized. Then combined the functional module structure of vehicle supervision system,compared mobile positioning solutions available on vehicle terminal and data communication technologies, introduced logical configuration of supervision software, this paper confirms the general design of vehicle supervision system based on GPSOne position-location and CDMA data transmitting technology.Based on above work, the hardware system of vehicle terminal is designed and implemented, taking the ATMEGA64(L) microcontroller and DTGS-800 module as the core. Then every hardware module of vehicle terminal connection is described in detail, also the PCB drawing and soldering are completed. On these basis, positioning process and positioning data transmitting are introduced, and the software design is conducted, including remoter decoding, LCD displaying, system position, menu cutting, voice and SMS communication, EEPROM written and read, serial interruption and so on. The software is coded by C.Overall, by introduction of GPSOne position-location technology to the vehicle supervision system, a economic solution is proposed, and the software and hardware design of vehicle terminal are expounded. This scheme presented in the paper is feasible and it has certain promotive application value.
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