Electrified railway clearance detection method and system based on laser scanning

An electrified railway and laser scanning technology, applied in the field of measurement, can solve problems such as low operation efficiency and complex overall process, and achieve the effect of ensuring accuracy, enhancing effect, and eliminating accumulated errors

Active Publication Date: 2021-06-18
领视科技成都有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can establish a 3D point cloud model of the tunnel in a unified coordinate system, but it is completely manual to move and set up the station, the work efficiency is low, and a control network needs to be established for point cloud registration. The overall process is relatively complicated, and it is generally used in cities Inspection Operation of Shield Tunnel During Rail Transit Construction Period

Method used

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  • Electrified railway clearance detection method and system based on laser scanning
  • Electrified railway clearance detection method and system based on laser scanning
  • Electrified railway clearance detection method and system based on laser scanning

Examples

Experimental program
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Effect test

Embodiment 1

[0060] In an exemplary embodiment, a laser scanning-based electrified railway limit detection method is provided, which is used to detect the limit of the electrified railway catenary. The detection device is built on a detection platform, and the detection platform can be placed on the rail Free movement, several positioning points are set around the railway, and a mid-span measurement point is set at a certain distance between two adjacent positioning points; the detection device includes a measuring device, a section scanning device and a data processing device, such as figure 1 As shown, the method includes the following steps:

[0061] The measuring device scans the positioning point and the mid-span measuring point, and when the positioning point is scanned, the cross-sectional scanning device performs multiple cross-sectional scanning on the cross-sections within a certain range before and after the positioning point to obtain corresponding multiple three-dimensional spa...

Embodiment 2

[0070] This embodiment has the same inventive concept as Embodiment 1. On the basis of Embodiment 1, a specific method for cross-sectional scanning is provided. The detection device also includes a photographing device, and the photographing device captures a panoramic image of the current scanning section. Specifically, after obtaining the three-dimensional space contour data at the current positioning point, let the detection platform continue to move forward for a certain distance, and take a panoramic high-definition image of the current scanning section. The function of taking a picture is to associate a High-definition images are used for storage, playback, analysis, and management of the actual situation at the section view.

[0071] The section scanning device is a laser phase scanning radar, such as figure 2 As shown, the laser phase scanning radar is located on the rail on one side of the railway.

[0072] The laser phase scanning radar scans and measures the cross...

Embodiment 3

[0088] Specifically, using the hand-push measuring trolley as the detection platform can realize the patrol inspection of any section of the line, which solves the problem that the current vehicle-mounted limit detection device is easily restricted by organized traffic, and at the same time, the electrified railway limit intelligent measuring instrument does not need to be dispatched For rail cars, inspection operations can be carried out only by blocking the inspection area. It is simple and efficient to use the hand-push measuring trolley, and after the section is blocked, it can continuously detect the electrified railway limit at a speed of 0-5km / h, which greatly improves the efficiency of manual measurement.

[0089] Specifically, such as Figure 4As shown, in an embodiment, a specific structural diagram of the measuring trolley is provided, including a telescopic walking frame 10, and the walking frame 10 can also directly adopt an existing telescopic rod, that is, the w...

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Abstract

The invention discloses an electrified railway clearance detection method and system based on laser scanning, and belongs to the technical field of measurement. The section scanning device carries out multiple times of section scanning on sections within a certain range before and after the positioning point and the midspan measuring point to obtain multiple parts of corresponding three-dimensional space contour data; compressing and fitting the three-dimensional space contour data near the same positioning point and the midspan measurement point into two-dimensional data to obtain two-dimensional cross-section diagram data of the positioning point and the midspan measurement point; and comparing the two-dimensional cross-section diagram data with the standard limit data to obtain over-limit data. According to the invention, the positioning point and the midspan measurement point are scanned, so that the limit measurement of the electrified railway contact network and related equipment thereof can be quickly realized, and the condition of missing detection is avoided; and the three-dimensional space contour data is compressed and fitted into two-dimensional data, so that two-dimensional cross-section diagram data of the electrified railway overhead line system can be obtained, and the accuracy of the detection data can be improved.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a laser scanning-based electrified railway limit detection method and system. Background technique [0002] The limit detection of electrified railway is very important to the safe operation of the catenary. After a long period of detection and operation, the existing limit detection methods still have some shortcomings. [0003] One of the limit detection technologies: install the CCD camera on the rail car. When the rail car passes through the tunnel, the CCD camera takes pictures to obtain data, and obtains results through data post-processing. This technology needs to install multiple CCD cameras, and it is easily affected by external light when collecting data. The control relationship and data processing are complicated, and it is impossible to establish a three-dimensional model of the tunnel. [0004] The second limit detection technology: use the ground 3D laser sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/08
CPCB61K9/08
Inventor 茹振华庞黎明李佶林
Owner 领视科技成都有限公司
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