Power transmission line sag measurement method based on unmanned aerial vehicle laser point cloud model

A transmission line, laser point cloud technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of insufficient measurement accuracy of transmission line sag, achieve convenient measurement, improve accuracy, and improve work efficiency.

Pending Publication Date: 2022-04-26
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0009] The purpose of the present invention is to provide a transmission line sag measurement method based on the UAV laser poin

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[0025] The embodiments of the present invention are described in detail below, intended to be used to explain the present invention, and cannot be construed as a limitation of the present invention.

[0026] Arc sag measurement method of transmission line based on UAV laser point cloud model, including the following steps:

[0027] Step 1: Determine the two cable pole towers that need to be measured;

[0028] Step 2: Use the UAV equipped with the 3D laser point cloud scanner to conduct a 3D laser scan of the transmission line between the two pole towers and the two pole towers to obtain the corresponding point cloud data; after obtaining the corresponding point cloud data, it is necessary to remove the noise, data streamlining, smooth processing and data registration of the point cloud data;

[0029] Step 3: Using the point cloud data in step 2, the triangular grid method is used to reconstruct the point cloud data in three dimensions to obtain the transmission line model;

[0030...

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Abstract

The invention discloses a power transmission line sag measurement method based on an unmanned aerial vehicle laser point cloud model. The method comprises the following steps that two cable towers needing to be measured are determined; performing three-dimensional laser scanning on the two towers and the power transmission line between the two towers by using an unmanned aerial vehicle carrying a three-dimensional laser point cloud scanner to obtain corresponding point cloud data; performing three-dimensional reconstruction by using the point cloud data to obtain a power transmission line model; importing the power transmission line model into a geometric drawing board for analysis, taking a hanging point of a tower at one end as an original point, establishing a coordinate system, measuring an abscissa of another upper hanging point, selecting a span midpoint, and measuring the size of a sag; the horizontal span L, the length D of the horizontal and vertical coordinates of the hanging points of the two towers and the sag length H on the geometric drawing board can be measured from the geometric drawing board, and the actual sag length f is equal to L * H/D. The method has the advantages that sag measurement accuracy is improved, measurement is convenient, complex calculation is not needed, and the intelligent level of a power transmission line is improved.

Description

technical field [0001] The invention relates to a method for measuring sag of a power transmission line based on a laser point cloud model of an unmanned aerial vehicle. Background technique [0002] At present, the span measurement of transmission lines mainly uses theodolite or total station, and the span is measured by approximate measurement method. This method mainly has the following problems: [0003] 1. Insufficient measurement accuracy [0004] Using the data measured by theodolite or total station, the sag size calculated by the sag formula is an approximate value. For lines with large spans, the error between the sag and the design sag can reach 1 meter; The distance (such as the isolated file below 200 meters) line, the sag size is very small, and the theodolite or total station cannot be used for measurement. Therefore, the manual climbing tower is used to hang the slack plate for measurement, which is completely dependent on human visual inspection, which is t...

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Application Information

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IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 史锦阁石玉峰魏亚楠谈欢欢夏传帮杨雷蔡起要吴德智沈国欣朱振远翁志坚张瑩郑浩闻君姚晨希
Owner STATE GRID CORP OF CHINA
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