Airborne laser radar point cloud based three-dimensional reconstruction method for single-stage single power lead wire

Abstract

The invention discloses an airborne laser radar point cloud based three-dimensional reconstruction method for a single-stage single power lead wire. A three-dimensional geometric shape of the power lead wire is described through combination of a linear segment and a parabolic segment. The method comprises the following steps: step 1, loading airborne laser radar point cloud data of the single-stage single power lead wire; step 2, fitting a linear segment model by utilizing information of a two-dimensional projection point set of airborne laser radar point cloud of the power lead wire on an xy plane; step 3, fitting a parabolic segment model by utilizing elevation information of the airborne laser radar point cloud of the power lead wire and scale factor information of the two-dimensional projection point set; and step 4, in combination with the linear segment model and the parabolic segment model, generating a three-dimensional reconstruction model of the three-dimensional visual power lead wire. According to the method, the complexity of the three-dimensional reconstruction model is lowered and the reconstruction efficiency and precision of three-dimensional reconstruction of the single-stage single power lead wire are improved.

Description

technical field [0001] The invention relates to a three-dimensional reconstruction method for a single-file single power conductor, in particular to a single-file three-dimensional reconstruction method for a single power conductor based on an airborne laser radar point cloud, and belongs to the technical field of laser radar point cloud data information extraction. Background technique [0002] Overhead transmission lines are an important part of a country's backbone power grid and an important national infrastructure. However, transmission line failures will cause huge losses to people's daily production and life and the national economy. Therefore, in order to prevent and eliminate power grid security In the event of an accident, the power grid operation and maintenance department needs to invest a lot of manpower and material resources to inspect the transmission line every year. However, the traditional manual inspection method is labor-intensive, the working conditions...

AI Technical Summary

Problems solved by technology

[0024] (1) "Existing Model 1" and "Existing Model 2" do not consider the y-value information of the power line lidar point cloud data, that is, they do not fully consider the three-dimensional error of the lidar point cloud data

[0025] (2) The existing goal of "existing model 3" is to fit the parabolic model, but the current formula (3) is obviously wrong

[0026] (3) The number of polynomial items in "existing model 4" is limited, which may lead to large model errors

[0027] To sum up, the selection and establishment of the mathematical model for 3D reconstruction of power conductors is an important content of 3D reconstruction of power conductors. However, the mathematical expressions of the existing 3D reconstruction models of power conductors are not uniform. 3D reconstruction mathematical model

Images