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Existing railway line retesting method based on on-board laser radar technology

A vehicle-mounted lidar and existing line technology, which is applied to roads, measuring instruments, tracks, etc., can solve problems such as low measurement efficiency and potential safety hazards, and achieve the effects of reduced field workload, high reliability, and reliable re-measurement results.

Active Publication Date: 2016-11-09
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

In recent years, with the rapid increase of the railway speed, the vehicle speed is fast and the density is high. The traditional existing line measurement method has great potential safety hazards and low measurement efficiency.

Method used

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  • Existing railway line retesting method based on on-board laser radar technology
  • Existing railway line retesting method based on on-board laser radar technology
  • Existing railway line retesting method based on on-board laser radar technology

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as figure 1 The existing railway line retesting method based on vehicle-mounted laser radar technology shown in , it includes the following steps:

[0029] Step 1: Before the vehicle-mounted lidar scanning, set up a control sign 1 at every preset distance (preset to 400m) along the railway to be tested, such as image 3 shown;

[0030] Step 2: and adopt the free station method of the total station to measure the position coordinates of each control mark 1 center point under the railway engineering coordinate system;

[0031] Step 3: Set up multiple GPS base stations along the railway to be tested along the direction of the railway to be tested, install the vehicle-mounted lidar system on the rear end of the railway commuter car or track inspection car, and scan along the railway to obtain the track, Laser point cloud da...

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Abstract

The invention discloses an existing railway line retesting method based on the on-board laser radar technology. Firstly, control marks are arranged along a railway to be tested at preset intervals; secondly, position coordinates of the center point of each control mark on a railway engineering coordinate system are measured; thirdly, laser point cloud data and image data of rails, railway equipment and facilitates (such as annunciators, turnouts and contact net rods), terrain around the railway and the control marks along the railway are obtained, and colors of the image data are assigned to corresponding laser point cloud data; fourthly, the obtained colorized laser point cloud data are subjected to precision refining treatment with the position coordinates of the control marks as reference points, so that errors in the colorized laser point cloud data are eliminated; fifthly, rail surface linear laser point data are extracted from the colorized laser point cloud data subjected to the precision refining treatment; and sixthly, the line type of the existing railway is restored through the rail surface linear laser point data. Information of the existing line is accurately obtained under the condition that operation of the railway is not influenced.

Description

technical field [0001] The invention relates to the technical field of retesting existing railway lines, in particular to a method for retesting existing railway lines based on vehicle-mounted laser radar technology. Background technique [0002] In the work of existing railway maintenance, management and second-line construction, in order to reproduce the existing line shape of the railway, it is necessary to implement existing line measurement. [0003] At present, the existing line survey is mainly based on the manual survey method. In recent years, with the rapid increase of the railway speed, the vehicle speed is fast and the density is high. The traditional existing line measurement method has great potential safety hazards and low measurement efficiency. Contents of the invention [0004] In view of the above technical problems, the present invention provides a method for retesting existing railway lines based on vehicle-mounted laser radar technology. In this meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B35/12
CPCE01B35/12
Inventor 李海亮冯光东熊国华郭良浩汤建凤胡玉雷刘冰洋刘善勇朱雪峰刘志友徐雪花
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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