Research And Simulation Of Location And Speed Of ATP Equipment

With the great development of high-speed railway in our country, a train operation control system that is advanced,safe,reliable,and efficient is necessary. Meanwhile, the ATP is the kernel of train control system on-board, and ATP's main task is to process integratedly train operation's control information to generate distance to go model curve which monitor train speed to achieve ultimately the train's automatic overspeed protection. But the location and speed detection system is the basis of all.The location and speed detection system is used to provide some information like position, speed,and so on, and it is the one of key equipments. Its operational principle is to measure the speed of the train by the velocity sensor which is fixed on the axle and calculate move distance according to the speed. Meanwhile, error of move distance is reduced or removed by the positioning equipments beside track or on-board. Besides accuracy of velocity sensor and wheel wear can cause error of moving distance, the most important reason is spin and slide. So, it is a great practical significance of studying spin and slide to the train operation control system.At present, the development trend of location and speed detection system is to use multi sensor fusion technology. In this paper, a method that measure speed by a compound mode of axle speed sensor and radar speed device has been put forward after researching many methods of train positioning and speeding, meanwhile eliminate error of distance by location balise as a effect auxiliary scheme. The key of this method is to judge whether there is happened slide or slip by a compound mode of axle speed sensor and radar speed device, in addition adjust the speed and ranging of train according to the speeding values. After this model of detecting and adjusting spin and slide is built, the error of model is analyzed. At last, the simulation system of location and speed is designed based on VC++6.0 develop environment, and the result of simulation achieved the expected result.