Key Technology Of High-speed Rail Turnout Precision Measurement

In recent years,the domestic high-speed railway projects are more and more.After several speed substantially,high-speed rail turnout technology has become one of the key to limiting the development of high-speed railway in China.Because the expect of high speed rail turnout is also more and more strict.Ride comfort directly determines the running speed,safety and comfort of high speed train.In this process,the precision measurement of high-speed rail turnout is very important.And it is very important to dealing with the data of turnout measurement.Therefore,this paper studies some key techniques of high speed rail turnout measurement.In this paper,the conventional CPIII control survey,and the method of trigonometric leveling is studied in this paper.This paper describes the conventional CPIII control measurements,and the method of trigonometric leveling instead of leveling surveying.This paper describes the principle and process of precision measurement about high-speed rail turnout.And analysing of the errors caused by the precision measurement.Aim at each stages’ pretreatment of turnout precision system proposes solutions.According to the actual situation of the precision adjustment of turnout selects order number of the trend line.The mathematical model of the precision adjustment system of the turnout is established.And making sure the objective function,making adjustment plan.At last,Introducing the application of the software of high speed switch by experiment,Reducing the workload of the adjustment,improving the efficiency of adjustment,having important significance.