A Measuring Method of Catenary Geometric Parameters Based on Geometric Magnification Principle and Monocular Computer Vision

Abstract

The invention discloses a catenary geometric parameter measuring method based on geometric amplification principle and monocular computer vision. The method comprises the steps of retaining the imaging plane of a camera to be horizontal; using the camera to carry out image acquisition on a contact line and obtain a first image; turning on a linear laser, enabling the included angle between the plane formed by the linear laser emitted by the linear laser and the horizontal plane is alpha, line laser intersecting with the contact line to form a laser bright spot; using the camera to carry out image acquisition on the contact line with the laser bright spot to obtain a second image; carrying out preprocessing on the first image and the second image, and obtaining the coordinate of a point Acorresponding to the center point A 'of the laser bright spot in the imaging plane of the camera, setting C' and obtaining the coordinates of the point C of the C 'in the imaging plane, measuring theguide height of the C ', and calculating the guide height and the pull-out value of the contact line at the A ' according to the coordinates of the point A and the point C. According to the invention,high-precision real-time measurement can be carried out on the guide height and the pull-out value of a contact line.

Description

technical field [0001] The invention relates to the technical field of electrified railway power supply, in particular to a catenary geometric parameter measurement method based on the geometric magnification principle and monocular computer vision. Background technique [0002] In the electrified railway power supply system, the catenary is the transmission circuit erected along the railway line to supply power to the electric locomotive, and the catenary wire is the wire that supplies power to the electric locomotive. In order to ensure a good contact between the contact wire and the pantograph of the electric locomotive, the geometric parameters of the contact wire must be set accurately, and the most important parameters include the conductivity and pull-out value of the contact wire. The guide height of the contact line is the vertical height from the contact line to the rail plane, and the pull-out value is the horizontal offset distance of the contact line at the posi...

AI Technical Summary

Problems solved by technology

[0009] Existing methods cannot identify the laser spot from the image stably, efficiently, and accurately. The process of calculating the conductance and pull-out value of the contact line from the coordinates of the image spot is complex, involving many parameters, large errors, and long delays. Can not meet the requirements of high-precision real-time measurement

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