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Insulator hydrophobicity rank amalgamation judging method based on D-S evidence theory

A technology of evidence theory and hydrophobicity, applied in the direction of image data processing, measuring devices, instruments, etc., can solve the problems of reducing the accuracy and reliability of hydrophobicity recognition, singleness, etc., to achieve improved accuracy and accuracy, multiple detection parameters, strong The effect of robustness

Inactive Publication Date: 2009-04-08
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Because these methods use a single hydrophobic characteristic, if these characteristic quantities are affected by various noise interference, the accuracy and reliability of hydrophobic recognition may be reduced, and there are different degrees of accuracy, reliability and practicability. Defects

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  • Insulator hydrophobicity rank amalgamation judging method based on D-S evidence theory
  • Insulator hydrophobicity rank amalgamation judging method based on D-S evidence theory
  • Insulator hydrophobicity rank amalgamation judging method based on D-S evidence theory

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Embodiment Construction

[0031] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0032] figure 1 It is a flow chart of the insulator hydrophobic grade fusion judgment method based on D-S evidence theory. Through analysis, it is found that the acquisition of hydrophobic images is affected by water spray angle, shooting angle, and on-site operating environment, so this method adopts the following rules to locate hydrophobic image regions. figure 1 In step 101, the image of the hydrophobicity of the insulator to be tested is obtained by using the water spray classification method. Here, a dynamic video is shot and a static image is captured from the dynamic video.

[0033] Step 102: Clipping the hydrophobicity image of the insulator to be tested within a time range of 1-2 seconds after the water sp...

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Abstract

The invention belongs to the power-system high-voltage equipment insulation test technical field and discloses an insulator hydrophobic-nature classes-integrating judging method based on the D-S evidence theory. The technical proposal is as follows: a water-spraying classification method is adopted to collect the image information relevant to the hydrophobic nature and then the image information is processed with cutting, de-noising and dividing; then three hydrophobic-nature sub feature points are extracted according to the bead / water mark optical feature and shape information and the like. of the hydrophobic-nature images; then the extracted three sub feature points, i.e. area, shape and brightness are adopted as the features of three classifiers and the fuzzy rules are adopted to figure out the basic probability assignment function of each classifier; and finally the integration judging is carried out for the results of three classifiers according to the D-S evidence theory. The invention can effectively enhance the hydrophobic-nature identifying precision and reliability so as to overcome the defects in the prior art on accuracy, reliability and practicability and the like. and meet the requirement for the insulator hydrophobic-nature on-line test.

Description

technical field [0001] The invention belongs to the technical field of insulation detection of high-voltage equipment in a power system, and in particular relates to an insulator hydrophobicity level fusion judgment method based on D-S evidence theory. Background technique [0002] With the continuous occurrence of insulator pollution flashover accidents, the safe operation of insulators has become an important link in the power system. The hydrophobicity of insulators is an important factor affecting the pollution flashover of insulators, so it is urgent to study the judgment of insulators' hydrophobicity level. Traditional hydrophobicity detection methods mostly use manual methods for image acquisition and judgment, which is inefficient and wastes a lot of human resources; at the same time, inconsistencies will inevitably occur due to human subjectivity. On-line detection of hydrophobicity based on image analysis makes automatic judgment possible. At present, some power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00G06T7/00G01R31/12
Inventor 唐良瑞祁兵杨秋霞张晶龚钢军孙毅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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