Research On Urban Railtransit Location Technology Of Vehicle Controller

Train location is the key technology to improve the level of train traffic safety and transport efficiency. In the CBTC, VOBC is the core of vehicle equipment. VOBC can process comprehensively diverse informations of train movement, and production goals protection from the speed curve real-time, monitoring the operation of the train. All this is inseparable from the train location technology.According to the special circumstances of urban rail transit, integrated positioning solutions designed,The method of speed and location detection is using in train location.Its working principle is to use axle velocity sensor, radar speed device, acceleration spectrum which are installed in the vehicle to calculate speed and acceleration parameters during the operation of the train. Calculate the location of the train based on these parameters. While taking advantage of wayside equipment responder to check the absolute position with reduce the error of running. Error in the train operation are:wheel wear, sensor measurement error, error of spin and slide, the most important reason is error of spin and slide, It is influenced the location of the train. The work which checked spin and slide in the process of measure speed and location of this paper have important value referenceIn this paper, a method that measure speed and position by a compound mode of axle velocity sensor, radar speed device, acceleration spectrum has been put forward after researched many train positioning technology, meanwhile eliminate error of position by the balise. The key point of this design is to detect have spin or slide by the Several sensors measurements and the check of spin or slide, Then according the measurement value to calculate the distance of train run,completion of the measure speed and position system. In order to improve the location accuracy of the train further,will use the method of information fusion in the location and get the speed estimates of the optimum from the measurements of the three sensor fusion,and to calculate the location of the train based on these estimates. Finally simulation the speed and location detection system, the processing speed of information fusion and to achieve the desired objectives.