Analysis And Design Of CRTSⅢ Ballastless Track Slab Rapid Detection System

With the rapid development of high-speed railway,higher and higher requirements are put forward for operation speed and operation stability.As the cornerstone of high-speed railway stable operation,CRTSⅢ ballastless track board used for laying high-speed railway has attracted more and more attention.CRTSIII ballastless track boards are 5600 mm long,2500 mm wide,made from a material such as concrete casting.There are even number of regular concrete rail bearing platforms distributed on the rail board.The rail bearing platforms have large dimensions and high surface accuracy requirements,so it is difficult to detect the relevant dimensions.The existing measurement methods,either manually coordinated with the total station measurement or off-line coordinate measurement,are inefficient,time-consuming and labor-consuming,and part of the size detection precision is not high enough to meet the requirements of the Ministry of Railways for the full inspection of the rail board,which hinders the pace of high-speed railway construction and brings safety hazards.The paper presen ts a fast measurement method for CRTSⅢ ballastless track board.This method is seamlessly connected with the previous procedure "water maintenance",which avoids the track board turning back and forth,saves two procedures,and integrates with the existing production line of CRTSⅢ ballastless track board,ensuring stable operation of production beat and meeting the quality requirements of full inspection and measurement of CRTS Ⅲ ballastless track board.By designing 9 groups of laser sensors and magnetic grid ruler corresponding to the rail bearing platform of the rail plate,the track plate topography data and height displacement data are collected respectively,and the rail bearing platform profile data are obtained in real time and processed in real time.The laser sensor and magnetic grid scale are used to synchronously collect the track board morphology data with high precision.The least square method is used to process the laser data at the point,analyze the consistency of the detection results,and verify the detection accuracy under different vibration and temperature conditions.The research results prove the accuracy and stability of the algorithm model.Aiming at the incomplete laser scanning data of embedded casing hole points on rail platform,3d point cloud data were collected by line laser,and the plane data of line laser point cloud and the boundary point of casing circle were fitted based on the optimization algorithm of RANSAC and Alpha-Shape.The accuracy of the algorithm was verified by experiments.Using MFC to develop the upper computer based on the VS2013 platform,and complete the automatic control and state monitoring of the measurement process,data processing and report generation,and uploaded the results to the information platform.The test system designed in this paper has been successfully applied to henan puyang track plate factory of zheng-ji high-speed railway.The field test shows that the test efficiency of the track plate test system is high,and the single board test takes less than 6 minutes,which can fully meet the requirements of the ministry of railways for full inspection.The detection accuracy is higher and more stable than that of CMM.And highly automated,freeing up manpower.The detection accuracy is high and meets the requirements of the detection indexes.Highly automated,freeing up manpower;High real-time,real-time data processing and upload reports.