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A power line extraction and fitting method based on vehicle lidar data

A power line and data technology, applied in the field of fitting power lines and extraction, can solve problems such as difficulty in clustering point clouds of a single power line in vehicle LiDAR, and achieve high practical application value, accurate identification, and low prices.

Inactive Publication Date: 2016-09-14
NANJING UNIV
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Problems solved by technology

Therefore, the point cloud processing algorithm for airborne LiDAR data is difficult to directly process the vehicle-mounted LiDAR point cloud, and because the vehicle-mounted LiDAR point cloud is denser and is more blocked by trees, buildings, etc., the power line point cloud presents a dense point cloud. ——Break—the spatial distribution characteristics of dense points, how to realize the clustering of single power line point cloud in vehicle LiDAR faces many difficulties
Therefore, the technical method of extracting power lines from vehicle LiDAR has yet to be explored

Method used

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  • A power line extraction and fitting method based on vehicle lidar data
  • A power line extraction and fitting method based on vehicle lidar data
  • A power line extraction and fitting method based on vehicle lidar data

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Embodiment Construction

[0063] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0064] In this embodiment, the attached figure 2 The vehicle-mounted LiDAR data shown is used as the initial data extracted from urban power lines. The data is the "SSW Vehicle-mounted Laser Modeling and Measurement System" developed by the Chinese Academy of Surveying and Mapping Sciences (360-degree laser scanning, measuring distance range 3-300m, reflectivity 80%, Point frequency 200,000 points / second) part of the data obtained, the collection time is 2011, using 1:500 topographic map correction. The embodiment area is located near the Nanjing Olympic Sports Center, the size of the area is about 150mX150m, the total number of point clouds is about 4.4 million, and the average point spacing on the power line is about 7cm. The specific implementation of this example adopts the standard C# programming language to realize under the platform of...

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Abstract

The power line extraction and fitting method based on vehicle-mounted LiDAR data is as follows: firstly, the point cloud of vehicle-mounted LiDAR is divided by voxels, and the points in each voxel are determined; then, according to the distribution characteristics of real power lines, voxels that do not contain point clouds of power lines are eliminated; Then divide the filtered power line point cloud according to the power line corridor, and use the AutoClust algorithm to perform initial clustering on the power line point cloud; Classes are merged together; finally, according to the characteristics of the power line, the broken power line is restored, and finally a point cloud that can be used to characterize a single power line is obtained, and three-dimensional fitting is performed based on this. The invention can realize automatic and fast extraction of power line point clouds in massive vehicle-mounted LiDAR data, and realize accurate identification of a single power line and accurate fitting of a three-dimensional model of the power line.

Description

technical field [0001] The invention relates to a method for extracting and fitting power lines from vehicle-mounted LiDAR data. Background technique [0002] Power lines are an important part of the line assets of the power sector, and play an important role in power line inspection, power grid design and upgrade, power professional analysis, etc., and the security of power line infrastructure significantly affects our daily life and industry Activities; its detection and monitoring can provide strong support for power line management and maintenance to discover and avoid potential safety hazards and unnecessary economic losses, and ensure the healthy development of the national economy and the safety of residents' lives and property. [0003] The traditional monitoring of power lines is mainly manual operation, which is not only time-consuming and laborious, but also unable to obtain large-scale observation data. With the development of lidar technology, airborne lidar, a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00G06T17/00
Inventor 程亮童礼华李满春王昱伍阳黄秋昊李飞雪陈焱明张雯杜培军
Owner NANJING UNIV
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