Study On The Supporting Pole Number Integrated Testing System Of The Catenary Inspection Car Based On GPS

With the rapidly develop of Electrified Railway, and the train runs more and more faster. The safety requirement of Electrified Railway becomes higher and higher. Overhead Catenary System (abbr. OCS) is vital to the Electrified Railway's power supply, and causes trouble easily. The accident caused by OCS is an important part that affects the development and safety of Electrified Railway. In order to keep its perfect condition, we must learn a lot about the equipments of OCS. Catenary Inspection Car is the most useful equipment, it is widely used in OCS testing.Owing to the problem exists in the supporting pole number testing system of the Catenary Inspection Car, an improved method based on GPS is proposed. Using the theory of GPS and combining with database, it can eliminate the accumulative errors caused by pulse count. The improved method can not only identify the starting station and supporting pole number but also proofread the station and supporting pole number automatically in testing. Comparing to the supporting pole number testing system of the Catenary Inspection Car widely used at present, it can enhance the level of automatization and intelligence of the Catenary Inspection Car and improve the accuracy of supporting pole number testing. The method shows good value of application and practical significance.First, due to the actual requirement of supporting pole number testing system, the GPSCard is selected. Then, the GPSCard COM port's asynchronous drivers is configured and the output logs and frequency is selected. Before the supporting pole number testing, we should set up the database of the original positional coordinate of every supporting pole. In the testing, by processing the Rail-time position information from the GPSCard we can obtain the coordinate of the Catenary Inspection Car at the moment. Comparing to the coordinate of supporting pole in the original database, the position of the Catenary Inspection Car can be obtained. In some certain areas, the GPSCard can't receive signals. Furthermore, the original supporting pole number testing system also have some shortcomings, such as can't identifythe starting station and supporting pole number, it must be input by hand. In the testing, when the supporting pole number is wrong, we have to correct it manually. By comparing of the different integrated positioning mode, a supporting pole number integrated testing system is proposed.The method to implement the communication between PC and GPSCard using MSComm control of VB 6.0 is carried out. The programs, which establish the original database and identify the supporting pole number is designed. The network communication through different computer is founded. Furthermore, the algorithm for integrated location and the supporting number identify is designed. Finally, some tests in the locale field were been done. Based on analyzing of the main errors, we made some improvements to this system.