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Automatic extraction method of insulator chain infrared imagery disk and steel cap area

A technology of insulator strings and infrared images, which is applied in image analysis, image data processing, instruments, etc., can solve the problem that the automatic extraction of insulator steel cap and disk surface information cannot be realized, and achieve good extraction effect and accurate extraction effect

Inactive Publication Date: 2015-07-22
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] The temperature distribution on the porcelain plate or steel cap of an insulator can characterize the state of the insulator. Therefore, it is very important to obtain information on the insulator plate and steel cap, and the automatic identification and extraction of insulators in infrared images is the basic step. Automatic Extraction of Insulator Steel Cap and Disk Information in Infrared Images of Strings

Method used

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  • Automatic extraction method of insulator chain infrared imagery disk and steel cap area
  • Automatic extraction method of insulator chain infrared imagery disk and steel cap area
  • Automatic extraction method of insulator chain infrared imagery disk and steel cap area

Examples

Experimental program
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Embodiment

[0034] Step 1: Image preprocessing. Input the infrared image Fig. 2(a) containing the insulator string into the image preprocessing program to obtain the binary image Fig. 2(b) of the infrared image of the insulator string.

[0035] Step 2: Insulator feature extraction. Input the binary image of the infrared image of the insulator string, Fig. 2 (b), into the insulator feature extraction program, and obtain the binary image of the feature set of the insulator string, Fig. 2 (c).

[0036] Step 3: Correct the inclination angle of the insulator. Input the feature set binary map of the insulator string Fig. 2(c) into the insulator tilt angle correction program to obtain the insulator string binary map Fig. 2(d) after angle correction.

[0037] Step 4: Extraction of insulator string steel cap and disk area. Input the angle-corrected insulator string binary image Fig. 2(d) into the insulator string steel cap and disk area extraction program to obtain the disk area binary image Fi...

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Abstract

Disclosed is an automatic extraction method of an insulator chain infrared imagery disk and steel cap area. The automatic extraction method includes preprocessing insulator chain infrared images taken on the site into binary images, extracting characteristic sets reflecting an insulator chain from the binary images by the morphological method, applying Hough transformation to correct angle of the binary images, and finally extracting the disk and steel cap area of insulators by the specific algorithm in area extraction. The automatic extraction method specifically includes steps of (1) image preprocessing; (2) extraction of insulator characteristics; (3) oblique angle correction of the insulator chain and (4) extraction of the insulator chain disk and steel cap area; (5) division results according to the insulator chain original infrared images of the step (1) and position information of the disk and steel cap area of the step (4). The insulator disk and steel cap edges in the binary images can be subjected to morphological processing and statistical analysis to obtain the ideal analysis results and then are divided and extracted to obtain good extraction effect.

Description

technical field [0001] The invention relates to an automatic extraction method for an infrared image disk surface and a steel cap area of ​​an insulator string, and belongs to the technical field of operation, maintenance and repair of high-voltage power transmission and transformation equipment. Background technique [0002] Porcelain suspension insulators (hereinafter referred to as insulators) are the main insulating parts in the power grid and also play the role of mechanical support. In the technical field of operation, maintenance and overhaul of power transmission and transformation equipment, early detection of insulator performance degradation is an important guarantee for the safe and stable operation of power transmission and transformation equipment, and is directly related to the safety and stability of the power grid and the reliability of power supply to users. [0003] The temperature distribution on the porcelain plate or steel cap of an insulator ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 李唐兵
Owner STATE GRID CORP OF CHINA
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