Research On Dynamic Reconstruction Method Of Transmission Line Based On Binocular Vision

Galloping of transmission lines will pose a serious threat to the safe operation of power supply system.To master the original galloping condition of the transmission line,we can make targeted decisions and prevent accidents.Therefore,this paper studies a three-dimensional transmission line galloping reconstruction scheme based on binocular vision.At present,in the transmission line galloping detection method based on machine vision,the sub-spacer on the transmission line is mainly selected as the feature,while in real life,many transmission lines do not have sub-spacer installed.In view of the situation that there is no obvious reference on the transmission line,this paper takes the transmission line itself as the feature,extracts the characteristic value from the image sequence and completes the feature matching,and finally realizes the three-dimensional galloping reconstruction of the transmission line.Firstly,a binocular acquisition system is built to obtain the complete image sequence including the whole galloping process of the transmission line.Aiming at the problem that the area near the power line is noisy in the image sequence,the guided filter is used to remove the noise.Secondly,the internal and external parameters of binocular camera calibration are solved,and the stereo correction of image sequence is completed.The features of transmission lines in the image sequence were extracted and matched,and the 3D point cloud of transmission lines at each moment was solved.Finally,aiming at the three-dimensional point cloud of power transmission lines,an adaptive reconstruction model of power transmission lines based on the least square method is studied.This model is used to reconstruct the threedimensional point cloud of power transmission lines at every moment in the image sequence,and then the three-dimensional galloping status of power transmission lines can be obtained.The experimental results show that the proposed scheme can realize the 3D galloping reconstruction of transmission lines with an accuracy of 50 mm,which can provide a certain reference value for the design and maintenance of transmission lines.