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A high-precision method for detecting sag of overhead transmission conductors

A technology of overhead transmission wire and detection method, which is applied to measurement devices, instruments, optical devices, etc., can solve the problems of low precision and undisclosed sag value, etc. advanced effects

Active Publication Date: 2021-03-19
内蒙古蒙能建设工程监理有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The accuracy of this method is not high, and it is not disclosed how to specifically calculate the sag value of the line between the adjacent towers

Method used

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  • A high-precision method for detecting sag of overhead transmission conductors
  • A high-precision method for detecting sag of overhead transmission conductors
  • A high-precision method for detecting sag of overhead transmission conductors

Examples

Experimental program
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Effect test

Embodiment

[0042] Such as Figure 1-9 Shown is a high-precision sag detection method for overhead transmission conductors, including the following steps:

[0043] S1. Using a 3D laser scanner or using a 3D laser scanner and a prism-free total station to obtain the wire point cloud data at different instantaneous points within the measurement period of an overhead power transmission wire.

[0044] For short-range 3D laser scanners, the method of combining with a prism-free total station can be used for measurement. For long-range 3D laser scanners, no prism-free total station is needed, and only a 3D laser scanner is required. Whether a prism-free total station is needed is judged based on whether the 3D laser scanner can obtain the lowest point of the transmission line and the point cloud data of the suspension point at one stop.

[0045] For short-range 3D laser scanners, the field conditions are as follows figure 2 As shown, first set up a prism-free total station to obtain the coor...

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Abstract

The invention discloses a high-precision overhead transmission conductor sag detection method, and relates to the technical field of metering length, width or thickness by metering equipment characterized by adopting an optical method. The method comprises the following steps: acquiring conductor point cloud data of different instantaneous points of one overhead transmission conductor in a measurement period; performing data processing on the wire point cloud data, establishing a wire coordinate system, and extracting wire feature point data; establishing a catenary equation of the overhead transmission conductor and a sag equation of the overhead transmission conductor based on the conductor coordinate system; and fitting and solving a catenary equation of the overhead transmission line and a sag equation of the overhead transmission line by adopting a nonlinear least square method based on the line feature point data. The method is high in precision, and can calculate the conductor sag at any position.

Description

technical field [0001] The invention relates to the technical field of measuring equipment characterized by adopting an optical method for measuring length, width or thickness, in particular to a high-precision sag detection method for overhead power transmission conductors. Background technique [0002] Sag refers to the vertical distance between the lowest point of the conductor and the line between the two suspension points when the suspension height of the conductors on two adjacent base poles is the same on a flat ground. Conductor sag is an important factor that must be considered in the work of overhead transmission line construction lofting, project acceptance, operation and maintenance, and capacity increase evaluation. If the sag is too large, the safety distance between the wire and the ground or the cross-span becomes smaller, and the tower needs to be raised to ensure safety. At this time, the project investment is bound to increase. Therefore, in the actual po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02
CPCG01B11/002G01B11/02
Inventor 梁永生何金铭张健田景忠蔺永强
Owner 内蒙古蒙能建设工程监理有限责任公司
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