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Automatic extraction method for power transmission lines based on airborne laser point cloud data

A point cloud data, automatic extraction technology, applied in the direction of image data processing, instrumentation, calculation, etc.

Inactive Publication Date: 2018-03-06
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the classification method of traditional transmission line point cloud data, and to separate the transmission wires and towers from the original point cloud data through a series of algorithms, thereby realizing the classification of transmission towers and wire point clouds automatic extraction

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  • Automatic extraction method for power transmission lines based on airborne laser point cloud data
  • Automatic extraction method for power transmission lines based on airborne laser point cloud data
  • Automatic extraction method for power transmission lines based on airborne laser point cloud data

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Embodiment Construction

[0031] See figure 1 , based on the power line automatic extraction method of airborne laser point cloud data, the feature of the present invention is:

[0032] 1) Adaptive TIN algorithm eliminates ground points

[0033] The largest building size in the transmission corridor is taken as the side length of the largest grid, and the point with the lowest elevation is selected from each grid as the seed point for generating the surface TIN; any point (p i ) to the distance d of the triangular patch in the TIN i and the angle α with the node i As a basis for whether to keep this point:

[0034] ●If d i less than the maximum distance threshold d max , and α i less than the maximum angle threshold α max , then the point is added to the TIN to form a new TIN

[0035] ●If d i and alpha i more than d max and alpha max , then take the nearest triangle node as the center of symmetry, generate a virtual mirror point, and calculate the distance from the point to the nearest tria...

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Abstract

The invention provides an automatic extraction method for power transmission lines based on airborne laser point cloud data. Along with the development and application of laser radar technologies, airborne laser radar is also gradually introduced into the inspection for power transmission lines, the laser radar generates a lot of point cloud data after scanning a power transmission line corridor,and extraction for the power transmission lines and power transmission towers from the point cloud data is a basis for subsequent data analysis. However, the traditional manual classification method is great in workload and very time-consuming. The automatic extraction method provided by the invention for power transmission lines based on airborne laser point cloud data eliminates ground points byadopting adaptive TIN, filters irrelevant point data by adopting an eight neighborhood method and various filters based on the height and the density and retains points of the power transmission lines and towers. Finally, the power transmission lines are fit by a general linear equation, and the power transmission towers are extracted by using a shaped-based filter.

Description

technical field [0001] The invention relates to a method for automatically extracting power transmission wires and towers from airborne laser point cloud data, and is an automatic processing method for power transmission line point cloud data. Background technique [0002] The transmission line undertakes the task of transmitting and distributing electric energy for the power grid. It is the main artery of the entire power grid. It has the characteristics of long distances, complex corridors, many crossings, and large regional climate differences. The length of transmission lines is increasing year by year. With the continuous increase of transmission lines, the operation and maintenance work of transmission lines is also increasing, which makes the contradiction of insufficient number of transmission operation and maintenance personnel increasingly prominent. There is an urgent need for a technical method that can reduce labor input and improve the efficiency of transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/168G06T7/60
CPCG06T7/168G06T7/60G06T2207/10028G06T2207/20061
Inventor 黄绪勇张小波王艳涛
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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