Feature fitting-based visual inspection method for substation instrument and equipment inspection

A visual inspection and substation technology, applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve problems such as vibration or other external factors interference, image quality is not stable enough, etc.

Active Publication Date: 2018-09-07
杭州蓝雪科技有限公司
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Problems solved by technology

[0005] The present invention is mainly oriented to the visual detection requirements of the automatic patrol inspection of instruments in substations. Aiming at the technical problems in the prior art that the image quality collected during the patrol inspection process is not stable enough, and is easily disturbed by various lighting, platform vibration or other external factors, a new method is proposed. Visual detection method for inspection of substation instrumentation equipment based on feature fitting

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  • Feature fitting-based visual inspection method for substation instrument and equipment inspection
  • Feature fitting-based visual inspection method for substation instrument and equipment inspection
  • Feature fitting-based visual inspection method for substation instrument and equipment inspection

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[0070] The present invention will be further described below in conjunction with the accompanying drawings.

[0071] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, a visual inspection method for inspection of substation instrumentation equipment based on feature fitting, specifically includes the following steps, see Figure 4 :

[0072] Step 1. Collect an image of a substation inspection instrument, specifically take a target image with a CCD camera and convert the image into a grayscale image G;

[0073] Step 2. Perform preprocessing on image G to remove noise points and generate image G1.

[0074] Step 3. Use the edge operator to extract the edge information of G1 to generate image G2.

[0075] Step 4. Use the Hough algorithm to analyze the circular target in the image G2, and calculate the meter center C.

[0076] This stage is the meter pointer calculation:

[0077] Step 5. Surrounding the instrument center C, perform projection mapping on the ann...

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Abstract

The invention discloses a feature fitting-based visual inspection method for substation instrument and equipment inspection. With feature fitting-based instrument pointer positioning technology adopted, on the basis of the circular projection, edge statistics and fitting analysis of pointer edge features, two included sides of a pointer and the intersection point of the two included sides of the pointer are calculated; and during scale value calculation, linear interpolation is performed on two scales which are the closest to the pointer. With the method of the invention adopted, a current scale value can be the accurately estimated, and scale value calculation deviation caused by the positioning deviation of the center of an instrument or image tilt can be avoided.

Description

technical field [0001] The invention belongs to the technical field of machine vision, relates to a visual detection algorithm for inspection of instrumentation equipment in substations, and in particular to a visual detection method for inspection of instrumentation equipment in substations based on feature fitting. Background technique [0002] With the continuous development of science and technology and the gradual upgrading of substation management, most of the substations have been unattended. However, due to the imperfect automation technology and functional scope, the operating data of many equipment cannot be easily obtained through the existing online detection equipment. , It is often necessary to arrange regular inspections by staff. [0003] The introduction of automatic inspection and visual inspection technology can significantly make up for the shortcomings of the existing monitoring technology of the power grid. Through the acquisition, identification and a...

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Application Information

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IPC IPC(8): G06K9/00G06K9/46
CPCG06V20/20G06V10/44G06V2201/02
Inventor 姜文武施剑锋项国建
Owner 杭州蓝雪科技有限公司
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