Application of Vehicle-mounted Mobile Measurement Technology in Cross Section Measurement of Existing Railways
In order to solve the problems of low measurement efficiency and high safety risks of personnel working on the line faced by the traditional single-point measurement means in the cross-section measurement of existing lines,vehicle-mounted mobile measurement technology was adopted to carry out the application research of cross-section measurement of existing railroads,and the process and method of technology application were introduced from three aspects:acquisition equipment,data acquisition and data solving.Based on the LiDAR point cloud of the whole section along the railroad line rapidly collected by the technology,the rail model reconstruction and route center extraction method with POS trajectory line guidance and two-step ICP alignment was proposed,and on this basis,the data processing method of section point cloud segmentation and attribute point automatic calculation was designed,which realized the rapid batch production of the results of the cross-sectional measurement of the existing railway lines.Combined with the application of a railroad project to build a second line,the results show that:the elevation accuracy is 19.2 mm,distance accuracy is 16.1 mm,which meet the specification requirements of the reconstruction of railroad engineering measurement.The method can effectively improve the efficiency of the existing line cross-section measurement,significantly reduce the amount of on-line work,and change the status that railroad cross-section measurement mainly depends on the manpower,which provides technical support and safety guarantee for the existing railroad cross-section fast measurement.
existing railwayvehicle-borne mobile measurementpoint cloudcenter line detectioncross section
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