High-speed rail ballastless track bearing platform three-dimensional shape detection method based on digital image

Abstract

The invention discloses a high-speed rail ballastless track bearing platform three-dimensional shape detection method based on a digital image. A binocular vision camera and a total station prism measurement unit form a detection system, prism groups in the binocular vision camera and the total station prism measurement unit are fixedly arranged on a measurement rack together, and camera coordinates are established; three-dimensional point cloud contour data of the track bearing platform is reconstructed by using a digital image which is obtained by shooting of the binocular vision camera and contains natural textures on the surface of the track bearing platform; and the total station prism measurement unit obtains the position of each prism in the prism group in the CP III control network, establishes the relationship between the camera coordinate system and the CP III control network, and unifies the three-dimensional point cloud contour data of the track bearing platform to the CP III control network in sequence, thereby realizing the three-dimensional shape detection of the track bearing platform. According to the invention, the detection efficiency is greatly improved, and the measurement precision meets the requirements of working conditions.

Description

technical field [0001] The invention relates to the construction of a non-cracked track, more specifically a method for three-dimensional shape detection of a rail-supporting platform of a non-cracked track. Background technique [0002] High-speed railways operate at high speed and density, and have high requirements for track smoothness and stability. In order to ensure the smoothness and stability of the high-speed railway track, it is necessary to measure the three-dimensional space shape of the rail bearing platform on the track slab before the track is laid. [0003] At present, the detection of rail bearing platform in practical application is mainly based on manual measurement, which has low measurement efficiency and high labor intensity, and cannot meet the detection needs of modern high-speed railways. [0004] The authorized announcement number is CN206208175 U, and in the utility model patent application document named "CRTSIII type track plate rail bearing pla...

AI Technical Summary

Problems solved by technology

This method reduces manual intervention to a certain extent, but it needs to constantly adjust the position of the measurement mold for each measurement, and the measurement process takes a long time. At the same time, the measurement information is only the elevation data of the track, which is difficult to meet the actual construction requirements due to the small amount of information. Requirements for azimuth and multi-dimensional 3D topography data

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