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Substation inspection robot-based circuit breaker state template-matching identification method

A technology for inspecting the status of robots and circuit breakers. It is applied in character and pattern recognition, instruments, electrical components, etc., and can solve problems such as low work efficiency, low efficiency, and inadequate inspection/checking.

Active Publication Date: 2012-01-11
STATE GRID INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Manual inspection
[0005] Manual inspection has the following defects: high labor intensity and low work efficiency; insufficient inspection / verification; long docking period with the existing management information system, etc.
[0009] The patent number CN201442264U published by the State Intellectual Property Office on April 28, 2010 is called "Substation Intelligent Inspection Robot", and the application number 201010508300.2 published by the State Intellectual Property Office on June 1, 2011 is called "Substation Equipment Intelligent Inspection Robot". The patents of "Robot System" have proposed technical solutions for substation intelligent robot inspections, but none of them have an automatic identification method for substation circuit breaker status, and can only rely on video images for manual judgment, which is inefficient

Method used

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  • Substation inspection robot-based circuit breaker state template-matching identification method
  • Substation inspection robot-based circuit breaker state template-matching identification method
  • Substation inspection robot-based circuit breaker state template-matching identification method

Examples

Experimental program
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Effect test

Embodiment 1

[0079] The daily inspection content of the high-voltage circuit breaker is mainly to judge whether the opening and closing state is consistent with the running direction. Circuit breakers produced by different manufacturers have different shapes, but most of them use the word "fen" with green as the background color and "close" with red as the background color to mark the disconnected or connected state, and some also add "On" or " Off" English word mark. Figure 1a and Figure 1b Two different shapes of circuit breaker display window images are given respectively.

[0080] In order to improve the reliability of the recognition results, the present invention extracts templates for the open and closed states of the circuit breaker, and uses the "open" and "closed" character areas of the circuit breaker under general lighting conditions as templates. Different circuit breakers have different display window shapes. For the generality of the method, the smallest circumscribed rec...

Embodiment 2

[0091] Figure 5a , Figure 5b , Figure 5c The circuit breaker image collected for a 220kV line circuit breaker A of a substation at different times (10 o'clock, 14 o'clock, 16 o'clock) on the same day, due to the different intensity and irradiation angle of sunlight, the gray distribution of the image is quite different. Figure 5a , Figure 5b , Figure 5c They are images less affected by illumination, images with normal illumination, and images with greater influence of illumination. Figure 5c In the process, sunlight causes specular reflection on the surface of the device, and the image character information is very little, and the human eye cannot judge it correctly.

[0092] The above three images are recognized using the algorithm in this paper. Table 1 shows the specific experimental results, where Rcombined and Rscore are the maximum matching values ​​of the combined template and divided template in the image to be recognized; Dcombined, Rscored The D score is ...

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Abstract

The invention discloses a substation inspection robot-based circuit breaker state template-matching identification method, wherein a substation inspection robot is used for automatically acquiring an image of a circuit breaker, and a template matching method is used for identifying the state of the circuit breaker. The method comprises the following specific steps: respectively extracting areas where characters of open and close are positioned as templates by using the template matching method, and carrying out matching on follow-up shot images; carrying out image segmentation on the open template, the close template and matched windows by using maximum between-cluster variance method (OTSU method) to obtain binary images which contain targets and backgrounds; and comprehensively judging the final state of the circuit breaker based on the difference degree between the templates and the targets of the matched windows. Proved by experiments, the method disclosed by the invention has the advantages of fast processing speed, high reliability, no misjudgment on given open-close conclusion and capability of satisfying with the requirements of real time and high reliability for field inspection.

Description

technical field [0001] The invention relates to a state recognition method of a circuit breaker in a substation, in particular to a state template matching recognition method of a circuit breaker based on a substation inspection robot. Background technique [0002] Substation high-voltage circuit breakers are responsible for the dual tasks of controlling the disconnection / connection of high-voltage lines and protecting isolating switches. They are the most important switching equipment in substations and must be inspected for daily inspection tasks in substations. The status of the equipment is identified by the characters "fen" and "combined" through the status display box. [0003] The main inspection methods and existing problems of high-voltage circuit breakers in substations: [0004] 1. Manual inspection. [0005] Manual inspection has the following disadvantages: high labor intensity and low work efficiency; insufficient inspection / verification; long docking cycle w...

Claims

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Application Information

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IPC IPC(8): G06K9/64G06K9/34H02B3/00
Inventor 王滨海李丽王万国李健王振利
Owner STATE GRID INTELLIGENCE TECH CO LTD
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