The Research Of Navigation System In The GPS Power Line Inspection Based By MapX

In recent years,the national grid has been developed very rapidly, and the size and number of high-voltage transmission line are rising continuously. In the power line inspection management, except of the traditional manual inspection, we have several electrical inspection integration technologies including:(1) Information button and IC card inspection; (2) PDA+GPS; (3) PDA+Barcode. Compare to the old-timely way"first write on the paper, then go back and load", the above technologies reduce the workload of patrol officers when they report datas, and improve their work efficiency. But they still can not meet the needs of specific work mobile processing, in some cases, may increase the workload after the application of these systems, so there are still many shortcomings. As a result, we design the method of PDA+GPS+GPRS in order to improve the above technologies.In this paper, the design of the entire system can be divided into two major parts: the user's system and the monitoring center. The user's system is running on the hand-held terminals of vehicles, which is responsible for information exchange with inspection personnel, to provide navigation, positioning and other functions. At the same time, it communicates with the monitoring center to achieve the two-way transmission of. GPS positioning datas. Monitoring center is mainly responsible for receiving the the GPS location datas from user's system.When the GPS datas are matching to digital maps, monitoring center is tracking the target position of the vehicle and monitoring the road condition. At the same time, monitoring center connects with the back-end database, which servers to carry out inspection of vehicles position informations and map information data table has been maintained and updated.The hardware of the system mainly uses the Samsung SBCS3C2410 ARM9 series development board kit, which not only has high performance, low power, interface, small size, good characteristics, but also supports for Windows CE, ARM-Linux and other high-end operating systems, so users develop it more simply and conveniently.Using VC + + as a tool, the software part, in combination with Access databases, is based on MapX to doing secondary development, and the results shows the system is debugging and compiling successfully in Windows. The experimental results show that the system can be connected with hardware such as GPS receiver seamlessly, well positioned to achieve the functions such as vehicle navigation, route planning, electronic map display, vehicle location tracking, real-time rendering track and others, which provide the basis of further study.The innovation of the paper is selection of the shortest path search algorithm in the user's system. Based on the ordinary A* algorithm, we introduce direction-first search and two-way search method, greatly improve the efficiency and preparation of the shortest path search. In addition, for the special requirements of electrical inspection, we use real-time mapping out the inspection of vehicles to run track and send to the remote server to store. At the same time, for the needs of the user, system can display a specific time for the history, to provide accurate navigation when they work outside.