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

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...

AI Technical Summary

Problems solved by technology

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

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