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Transmission conductor broken strand detection technology based on gray variance normalization

A technology of power transmission wires and grayscale variance, applied in image data processing, instruments, calculations, etc., can solve the problems of large detection error rate, time-consuming and labor-intensive, etc., to reduce the amount of data, achieve accurate identification, and overcome the complexity of background and illumination. effect of influence

Active Publication Date: 2018-11-02
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a transmission wire broken strand detection technology based on gray variance normalization, which solves the problems of manual transmission line inspection in the prior art, which is time-consuming and labor-intensive, and has a large detection error rate.

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  • Transmission conductor broken strand detection technology based on gray variance normalization
  • Transmission conductor broken strand detection technology based on gray variance normalization
  • Transmission conductor broken strand detection technology based on gray variance normalization

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Embodiment Construction

[0019] Under the frontal sunlight, the gray value of the junction of each single-strand wire in the image of the transmission wire is low, while the gray value of the surface of each single-strand wire is relatively high, because the circulation characteristics of the transmission wire structure are intact. It presents a cyclical-like characteristic. Once the transmission wire is broken, it will cause the single wire to lift or fall out. Since the inner and outer layer single-strand wires of the transmission wire have opposite winding directions and different winding angles, the lateral spacing of the single-strand wires changes. Affected by the low gray value of the inner layer of the power transmission wire at the broken strand, the single-strand wire corresponding to the central axis of the corresponding area The quasi-periodic characteristics formed by the horizontal gray value between the wires are destroyed.

[0020] Accordingly, the present invention highlights the tar...

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Abstract

The invention relates to a transmission conductor broken strand detection technology based on gray variance normalization. The technology comprises the following steps that: 1) obtaining the high angle shot video image I1 of a transmission line conductor, and carrying out graying, median filtering and histogram equalization processing to obtain a gray image I2; 2) carrying out gray variance normalization processing on the gray image I2; 3) adopting an adaptive threshold value segmentation method to carry out segmentation processing and morphology processing on an image I3, and fitting a transmission conductor area center axis and 1 / 4 and 3 / 4-thickness axes; 4) according to a fit axis equation, selecting gray value square wave graph on the center axis and 1 / 4 and 3 / 4-thickness axes from thepreprocessed gray image I2; and 5) carrying out statistical analysis on the integral Z-shaped waveform width of each axis square wave of the conductor to obtain a conductor single-strand conductor width graph, if the broken strand is in the presence, taking the maximum value of the conductor broken strand number represented by a continuous and non-intact single-strand conductor waveform as a detection result for the practical broken strand number of the transmission conductor.

Description

technical field [0001] The invention belongs to the technical field of electric power transmission line monitoring, and relates to a broken strand detection technology of a transmission wire based on normalization of gray scale variance. Background technique [0002] The transmission line is the artery of the power system, and the transmission wire is an important component of the transmission line. Due to external force damage, meteorological disasters, line aging and other factors, the broken strands of the transmission wire seriously threaten the stable operation of the transmission line and cause serious consequences. With the continuous expansion of power grid capacity and a large number of equipment, the existing manual transmission line inspection method is becoming more and more difficult to detect the operation status of transmission lines. In this case, the contradiction between the unknowability of the operation status and hidden troubles of transmission lines and...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/136
CPCG06T7/0004G06T2207/30164G06T7/136
Inventor 黄新波章小玲刘新慧刘成
Owner XI'AN POLYTECHNIC UNIVERSITY
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