Study Of The GPS Vehicle Monitor & Attemper System

In recent years, GPS (Global Positioning System) the global positioning system gradually applied to each profession. Specially in the vehicles monitoring and the dispatch system application is the vigorous development. The vehicles monitoring and the dispatch system are the application automatic vehicles localization technology, the geographic information system and the data bank technology, the computer technology and the modern communication high tech system ensemble. At present may use the localization technology are extremely many, including GPS, DR and the radiolocation, they respectively has the characteristic; The communication way also is same, at present may select the communication way includes: The radio colony communication, the GSM communication, China Mobile GPRS and China Unicorn's CDMA. How selects any type the localization technology and the communication technology as well as in these technology practical application vehicles monitorings and the dispatch system is the present paper main research content. In is actual, in the experiment and the paper investigation and study, has analyzed each kind of locate mode precision and the applicable scope as well as the use cost according to the vehicles monitoring and the dispatch system objective parameter, selected GPS to take this system the locate mode, and has made in the use precision analysis. In in the communication way selection, mainly "timeliness requests high according to the vehicles monitoring and the dispatch system, the data quantity quite is small" the characteristic selected GPRS (General Packet Radio Service) the general wireless grouping service way to take this system the main communication way. In the system construction process, the use inserted type CPU unifies the GPS positioning device and the GPRS communication terminal has manufactured the vehicles monitoring and the dispatch system terminal device, finally used the GIS geography information technology, the data bank technology as well as the TCP/IP network technology establishes the vehicles monitoring and the dispatch system central software system, and could implement in the actual project.