Composite insulator hydrophobicity grade determination method based on a water drop offset distance

A composite insulator and offset distance technology, which is applied in the field of image processing, can solve the problems of hydrophobic performance affecting the insulation performance of composite insulators, the shed aging of composite insulators, and increasing flashover phenomena, etc.

Active Publication Date: 2019-05-24
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology

However, in the process of use, due to the joint action of many factors such as high-voltage electric field, high-temperature sunshine, harsh climate and acid rain, as time goes by, the umbrella shed of the composite insulator gradually ages, showing the phenomenon of degradation of hydrophobicity
The degradation of hydrophobic performance will seriously affect the insulation performance of composite insulators and increase the probability of flashover

Method used

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  • Composite insulator hydrophobicity grade determination method based on a water drop offset distance
  • Composite insulator hydrophobicity grade determination method based on a water drop offset distance
  • Composite insulator hydrophobicity grade determination method based on a water drop offset distance

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Embodiment Construction

[0070] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0071] A method for judging the hydrophobicity level of composite insulators based on the offset distance of water droplets in the present invention, such as figure 1 As shown, the specific steps are as follows:

[0072] Step 1. Obtain the original color image of the silicone rubber insulator with water droplets, such as figure 2 shown;

[0073] Step 2. Carry out grayscale processing and image filtering processing on the color image obtained in step 1 to improve the contrast of the image and remove image interference noise, as follows:

[0074] Step 2.1, image grayscale processing, the grayscale formula is:

[0075] Y=0.299R+0.587G+0.114B (1)

[0076] Wherein, Y is the brightness calculated according to the relationship between the R, G, and B color components and the brightness signal Y in the color coding method YUV, and R, G, and B re...

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Abstract

The invention discloses a water drop offset distance-based hydrophobicity grade determination method for a composite insulator. The method comprises the following steps: firstly, obtaining an originalcolor image of a silicone rubber insulator with water drops; Carrying out graying processing and image filtering processing on the obtained color image to improve the contrast ratio of the image andremove the interference noise of the image; Then, an image fuzzy edge detection model based on a statistical gap membership function and correlation coefficient classification judgment is established,and the outline of the water drop or water stain is obtained; And finally, carrying out circular fitting on the obtained water drop contour area and processing the target binary image. the position information of each water drop is obtained, the moving distance of the water drops before and after the umbrella skirt is deviated is obtained, then the hydrophobicity grade of the silicone rubber composite insulator is judged, and when the deviation distance is smaller, the hydrophobicity of the silicone rubber composite insulator is better, and when the deviation distance is larger, the hydrophobicity of the silicone rubber composite insulator is poorer. According to the invention, the hydrophobic grade identification accuracy of the silicone rubber insulator is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for judging the hydrophobicity level of composite insulators based on the offset distance of water droplets. Background technique [0002] Silicone rubber composite insulators have been widely used in power systems due to their light weight, high strength, unbreakable properties, and good pollution resistance. However, in the process of use, due to the joint action of many factors such as high-voltage electric field, high-temperature sunshine, harsh climate environment, and acid rain, the umbrella shed of the composite insulator gradually ages over time, showing a phenomenon of degradation of hydrophobicity. The degradation of hydrophobic performance will seriously affect the insulation performance of composite insulators and increase the probability of flashover phenomenon. In order to prevent the occurrence of pollution flashover accidents, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/13G01N13/00
Inventor 黄新波聂婷婷张烨伍逸群
Owner XI'AN POLYTECHNIC UNIVERSITY
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