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High-speed rail contact line height and pull-out value inspection method based on airborne laser radar

A technology of airborne laser radar and laser radar, which is applied in the direction of using optical devices, radio wave measurement systems, measuring devices, etc., to achieve the effect of expanding the detection time range, improving accuracy, and avoiding negative effects

Active Publication Date: 2021-02-26
BEIJING JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, these existing methods are difficult to be applied in the actual high-speed rail operation

Method used

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  • High-speed rail contact line height and pull-out value inspection method based on airborne laser radar
  • High-speed rail contact line height and pull-out value inspection method based on airborne laser radar
  • High-speed rail contact line height and pull-out value inspection method based on airborne laser radar

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Embodiment Construction

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0047] like figure 1 As shown, an airborne lidar-based high-speed rail contact line conduction height and pull-out value inspection method includes the following steps:

[0048] Step 1: Use the drone equipped with lidar to inspect along the upper side of the railway line to obtain the original point cloud data of the line;

[0049] Step 2: Preprocessing the original point cloud data;

[0050] Step 3: Use random sampling consensus algorithm to segment and extract the processed original point cloud data to obtain catenary system point cloud and line plane point cloud;

[0051] Step 4: Extract the track in the line plane point cloud;

[0052] Step 5: Segment the point cloud of the contact suspension and pillar support in the catenary system;

[0053] Step 6: Extract the contact line in the contact suspension...

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Abstract

The invention discloses a high-speed rail contact line conduction height and pull-out value inspection method based on an airborne laser radar. The method comprises the following steps: carrying out inspection, by using an unmanned aerial vehicle carrying the laser radar, along the upper side of a railway line to obtain original point cloud data of the line; preprocessing the original point clouddata; segmenting and extracting the processed original point cloud data to obtain contact network system point cloud and line plane point cloud; extracting a track in the line plane point cloud; carrying out point cloud segmentation on a contact suspension and strut support part in the contact network system; extracting a contact line in the contact suspension point cloud; and matching the contactlines with the corresponding tracks, reconstructing a measurement scene, and automatically measuring the conduction height and the pull-out value of the contact line at each point. According to the invention, high-precision, high-efficiency and large-range railway field contact line static parameter detection is realized, is hardly influenced by external illumination conditions, and even can workin a dark environment, so that the detection time range is expanded, and the flexibility of maintenance work arrangement is improved.

Description

technical field [0001] The invention relates to the technical field of catenary measurement, in particular to an airborne laser radar-based inspection method for the guide height and pull-out value of a high-speed railway contact line. Background technique [0002] In recent years, the rail transit system represented by high-speed railway has developed rapidly, and the continuous growth of operating mileage has brought great challenges to safe operation. The catenary system (OCS) is the basis of electrified railways. The catenary wire is in contact with the pantograph above the train and maintains high-speed sliding contact during operation, so as to transmit electrical energy to the train. Therefore, the contact condition between the pantograph and the catenary wire directly affects the current flow of the train, and the spatial position of the catenary wire has an important influence on the contact state. A small change in the position of the catenary wire will cause seve...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01S7/48
CPCG01B11/002G01B11/02G01S7/4802
Inventor 王志鹏耿毅轩潘冯君贾利民秦勇童磊李齐贤
Owner BEIJING JIAOTONG UNIV
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