Inspection method of high-speed rail contact wire guide height and pull-out value based on airborne lidar

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

Active Publication Date: 2021-08-31
BEIJING JIAOTONG UNIV
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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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  • Inspection method of high-speed rail contact wire guide height and pull-out value based on airborne lidar
  • Inspection method of high-speed rail contact wire guide height and pull-out value based on airborne lidar
  • Inspection method of high-speed rail contact wire guide height and pull-out value based on airborne lidar

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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 method for inspecting the guide height and pull-out value of a high-speed rail contact line based on an airborne laser radar. The method includes the following steps: using an unmanned aerial vehicle equipped with a laser radar to inspect along the upper side of the railway line to obtain original point cloud data of the line ; Preprocess the original point cloud data; segment and extract the processed original point cloud data to obtain the point cloud of the catenary system and the point cloud of the line plane; extract the track in the point cloud of the line plane; Segment the point cloud with the support part of the pillar; extract the contact line in the contact suspension point cloud; match the contact line with its corresponding track, reconstruct the measurement scene, and automatically measure the lead height and pull-out value of the contact line at each point. The present invention realizes high precision, high efficiency and wide range of contact line static parameter detection on railway sites, is almost unaffected by external lighting conditions, and can even work in dark environments, which will expand the detection time range and improve maintenance work arrangements. flexibility.

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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Patent Type & Authority Patents(China)
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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