Abstract:In order to solve the problems of low precision, low efficiency and low intelligence level of manual inspection in the current power line inspection work of Guizhou Power Grid, this paper combines the working principle of UAV tilt photography technology to carry out UAV flight and modeling on transmission line towers, passages and surrounding environment, form a three-dimensional point cloud of power line channel, and accurately calculate the tree obstacle distance by using automatically matched power line position. The UAV tilt photography technology is used for power line inspection, which can realize the quantitative detection of tree obstacles on the basis of restoring the three-dimensional point cloud of transmission line channels, and explore a new method of UAV intelligent power line inspection. This paper will focus on the UAV aerial photography method, the surface 3D point cloud reconstruction method, the wire 3D reconstruction method and the tree-line distance measurement method, focusing on the analysis of the UAV tilt photography technology in the power inspection tree obstacle inspection operation. The working principle and process, combined with the experimental data of the first-line inspection team, explain its specific application in practice.