LiDAR-point-cloud-based full-automatic three-dimensional reconstruction method for multi-splitting lead
A technology for splitting wires and point clouds, which is applied in 3D modeling, image data processing, instruments, etc., can solve the problems of complex space structure and difficulty of split wires, achieve high degree of self-adaption and automation, and simple parameter setting Effect
Inactive Publication Date: 2016-11-23
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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It can be seen that compared with common non-split transmission lines, the spatial structure of split conductors is more complex, and it is more difficult to model finely
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[0012] The general idea of the patent of the present invention is as follows: first extract the point cloud of the power line from the original point cloud, then use the coordinates of the tower to segment the point cloud of the power line, then identify each section of wire and extract the point cloud of a single wire, and finally analyze each strand Multi-split wires for fine 3D reconstruction ( figure 1 ).
[0013] The power line shows obvious spatial characteristics in the laser point cloud, which is shown as: 1) linear distribution, usually running through the entire data area, etc.; 3) The power line points are projected as straight lines parallel to each other on the horizontal plane. However, because the power line is very narrow / thin, it can only reflect part of the laser pulse, so in the multi-echo information of the point cloud, the power line point often only appears as the first echo point, etc. Based on these characteristics, specific algorithms can be design...
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The airborne laser radar technology has been applied to the high-voltage / extra-high-voltage power transmission line patrol widely; and collected-laser-point-cloud-based three-dimensional reconstruction for a power transmission line body has the important engineering significance. According to the spatial distribution characteristics of the power transmission line, a power line point cloud is extracted preliminarily based on an elevation histogram and a point cloud frequency; a tower coordinate center is extracted automatically by the elevation histogram of the point cloud and is used as a basis of lead segmentation; a point cloud of a single power line is identified and extracted by using a Euclidean space clustering algorithm; partial projection is carried out on each stand of split lead and space combination is carried out on a projection cluster; and then fine modeling of the split lead is completed by using a catenary model and a least square fitting method. According to the invention, a fine modeling method of a split lead is put forwardly for the first time; and the method has characteristics of low manual intervention, simple parameter setting, and high adaptive degree; defects existing in the previous power transmission line body modeling can be overcome; and the automation degree and precision of the power transmission line patrol work based on an airborne laser radar can be improved.
Description
Technical field [0001] The patent of the present invention is a technology in the field of earth observation, and relates to a method for reconstructing a three-dimensional model of a transmission line based on airborne laser point cloud data. This method has high universality and is a method with practical application value. Background technique [0002] With the increase of the national economy's demand for electricity, the number and scale of high-voltage / ultra-high-voltage grids continue to expand, and grid design units and operation management departments have higher and higher requirements for the safety and reliability of transmission lines. The cost line inspection method is particularly urgent and important. LiDAR (Light Detection AndRanging, LiDAR) is an active remote sensing technology that integrates laser, Global Positioning System (GPS) and Inertial Navigation System (Intertial Navigation System, INS) technologies. And receive laser pulses to obtain higher de...
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Login to View More IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 王成夏少波习晓环
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI