The Optimization Of CPⅢ Data Acquisition And Point Stability Analysis

The high-speed railway has a rapid development in our country, in order to meet the requirements of high-speed railway track’s ride and stability, to achieve high-speed railway traffic safety, we must establish a set of high-precision control network to control the installation and operation and maintenance of the track. The RAIL.ONE Germany, executive vice president, Mr. Bachman did say that:" In order to construct the non-ballasted track successfully, it is necessary to have a complete and efficient and very accurate measurement system, otherwise you will fail" This shows that the measurement system plays an importance role in the non-ballasted track project. So the CPⅢ control network is established for this purpose.In the process of CPⅢ control network measurement, Firstly, we need to learn each measuring point about the first station, the second station need to learn CPIII point at least two, then learn all the unobserved CPIII points. In the process of CPⅢ repeated measurement, We have acquire all the CP Ⅲs coordinate, only need to learn two CPIII control points, by coordinate transformation, we can learn the remaining ten CPⅢ control points automatically. Nowadays, CPⅢ data acquisition software, especially in the process of CPIII’s repeated measurements, its efficiency is low.Because of the factors about temperature, load, and the elastic memorial at a different time, the beam telescopic change. Cause continuous beam’s CPFⅢ control points is unstable. When we use the CPⅢ control points of the continuous beam coordinates, requiring continuous beam’s CPIII measurement time with laying the track plate time interval as close as possible,the temperature environment as consistent as possible, and continuous beam’s load changes less. When we use the CPIII coordinates of each continuous beam,we should measure the CPⅢ control points within a short time, so lead low efficiency, impede the progress of the construction.In this thesis describes in two ways, the main line in order to improve the efficiency of the repeated measurements, Firstly, analyses the CPⅢ Data Acquisition software fully, optimize the CPIII Data Acquisition software, reduce the problem of outside industry, improve efficiency of CPⅢ control network’s repeat survey. Secondly, find out the mathematical model about the CPIII control point’s instability of the continuous beam, reduce the workload about the repeated survey about the continuous beam when we are constructing it. By the improvement of this two ways, the effiency of CPIII control network’s repeated survey becomes higher.