Power channel corridor routing-inspection method based on tilt photography three-dimensional reconstruction technology

Abstract

The invention discloses a power channel corridor routing-inspection method based on a tilt photography three-dimensional reconstruction technology, wherein the method includes the steps: A, combining a laser radar data measurement technology and a tilt photography technology, and rapidly constructing power transmission line channel high-precision three-dimensional base map data by using the laser radar measurement technology; B, acquiring three-dimensional real scene data of a channel corridor by using the tilt photography measurement technology; and C, carrying out fused analysis of the three-dimensional real scene information and a laser radar channel base map, effectively identifying and extracting trees and obstacles in the channel corridor, and then generating a tree barrier assessment report. By using the method, qualitative analysis of the tree barrier can be effectively turned into quantitative analysis, the position of a to-be-felled tree in the channel can be calculated, the felling area is statistical, and thus the safe operation of the line corridor is ensured.

Description

technical field [0001] The invention relates to a corridor inspection technology for overhead transmission lines, in particular to a power channel corridor inspection method based on a three-dimensional reconstruction technology of oblique photography. Background technique [0002] The inspection of corridor passages of overhead transmission lines is currently mainly based on manual inspections, manned helicopter inspections and drone inspections, mainly focusing on inspections of the defects of the lines themselves and external forces of the passages. However, whether it is manual inspection, manned helicopter inspection or drone inspection, most of them use visible light, infrared cameras or cameras to obtain image and video data, and can only qualitatively identify defects and faults (biased for defects in towers and wires). Qualitative identification), and quantitative identification cannot be achieved. [0003] There is also an overhead transmission line defect that re...

AI Technical Summary

Problems solved by technology

The estimation of the distance of the tree to the wire mainly relies on the visual inspection method of the inspectors to mentally calculate the distance from the sag to the top of the tree. It needs to be observed from various angles. However, due to the influence of distance and angle, this method has a great influence of artificial observation angle and illusion , cannot accurately evaluate its distance

[0004] In addition, some power grid companies have introduced large-scale laser radar systems to quantitatively measure and identify defects in transmission line corridors. However, due to the high cost of laser radar systems, high inspection costs, and long inspection periods, inspections often take many years. Therefore, Poor timeliness

[0005] At present, there are also miniaturized lidar systems on the market. Although their prices have dropped from tens of millions to several million, their costs are still high compared to manual inspections. In addition, which mode to use is still lacking in power line inspections. Reliable Application Basis

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