A power line modeling extraction method of a transmission line based on a laser point cloud

Abstract

The invention discloses a power line modeling extraction method of a transmission line based on a laser point cloud, which comprises the following steps of S1 obtaining the point cloud data of the transmission line; S2 carrying out the point cloud data preprocessing; S3 performing OSG point cloud interaction on the pre-processed point cloud data; S4 extracting the power line from the point cloud data and constructing a mathematical model of the power line; S5 according to the generated mathematical model of the power line, judging whether there is an object affecting the transmission securitywithin the safe distance from the transmission line in the point cloud data, and outputting a patrol inspection result report. The invention uses intelligent tools such as unmanned aerial vehicles (UAVs) to obtain dynamic point cloud data of transmission line channels, carries out OSG development on the point cloud data, and adopts Pagelod paging technology to dynamically dispatch the point cloudmodel composed of massive point cloud data. Then the transmission line is extracted and the mathematical model of transmission line is generated by fitting algorithm. According to the mathematical model, whether there is any object that affects the transmission line safety in the distance from the transmission line safety is judged in the point cloud data, and the patrol inspection results are outputted.

Description

technical field [0001] The invention belongs to the technical field of transmission line monitoring, and in particular relates to a method for modeling and extracting power lines of transmission lines based on laser point clouds. Background technique [0002] Electric energy has become the main driving force for modernization. As a basic public utility, it has played a pivotal role with the continuous improvement of people's living standards. Therefore, as an important part of the power grid, the safe operation of the transmission line is related to the reliable power consumption of the end users, and is the focus of the power sector. [0003] The intelligent and refined management of transmission lines is inseparable from the development of information construction of transmission line channels. Modern technology is used to realize the digital construction of real three-dimensional transmission line channels, and to provide digital analysis management and implementation of ...

AI Technical Summary

Problems solved by technology

[0005] At present, the application of lidar in power line extraction is in the initial stage, and there is little research in this area in China, and the extraction process uses Hough transform to extract power lines, that is, after converting the 3D point cloud into a 2D space, Hough transform is performed, such The method loses the elevation information of the point cloud data. For the multi-layer power line point cloud with the same plane position, the power line extraction and classification cannot be realized.

In addition, using Hough transform to detect power lines, the calculation process is complicated, which is not conducive to the application of large data volume scenarios

According to the closely connected characteristics of laser point clouds on the same power line, some researchers use the idea of ​​point cloud clustering and combine KD tree organization data structure to perform K nearest neighbor search to realize automatic extraction of power lines, but the algorithm needs to meet the clustering threshold K needs to be less than the minimum distance between two power lines. When the point cloud distance is greater than the minimum distance between two power lines, the K value cannot meet the needs of clustering, which reduces the integrity of clustering.

In addition, when the power line point cloud data is discontinuous (this often occurs in engineering) K nearest neighbor search cannot work

Images