Control rod guide clamp abrasion loss measurement method based on image recognition technology

A technology of technical measurement and image recognition, applied in the direction of measuring devices, character and pattern recognition, instruments, etc., can solve the problems of complex structure, detection equipment size, heavy weight, etc., to improve efficiency and reliability, facilitate follow-up management, details many effects

Active Publication Date: 2019-11-15
CGNPC INSPECTION TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires additional reflective equipment, the structure is complex, and the size and weight of the detection equipment are relatively large

Method used

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  • Control rod guide clamp abrasion loss measurement method based on image recognition technology
  • Control rod guide clamp abrasion loss measurement method based on image recognition technology
  • Control rod guide clamp abrasion loss measurement method based on image recognition technology

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Embodiment Construction

[0058] Below in conjunction with the embodiment shown in the accompanying drawings, the present invention is described in detail as follows:

[0059] A method for measuring the amount of wear of a control rod guide card based on image recognition technology, comprising the following steps,

[0060] (1) Calibrate the detection range; Figure 1a , 1b , 1c, the calibration detection position: E1, E2, E3, E4, B1, B2, B3, B4, D1, D2, D3, D4 hole positions, measuring dimensions R1, R2, L1, L2, W, D.

[0061] (2) Image acquisition; 1. Camera, the camera needs to choose an industrial camera with stable and reliable performance, and the resolution is required to reach 5 million pixels. The actual detection environment is in the nuclear power plant pressure vessel pool with underwater radiation, and it is necessary to make waterproof and radiation-resistant Therefore, the size of the camera is required to be small (the maximum diameter of the detection hole is 61mm), and the focal leng...

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Abstract

The invention discloses a control rod guide clamp abrasion loss measurement method based on an image recognition technology. The method mainly comprises the following steps of image processing and measurement calculation, wherein the measurement calculation comprises the steps that the outer circle of the guide clamp is fitted through the contour of the guide clamp, and the circle center O of thecircle hole of the guide clamp is obtained; theoretical upper and lower side straight lines L1 and L2 of a guide card lace are manufactured according to drawings; the straight line located on the sameside of the circle center O of the lace is the L2, and the straight line L2 is located on the lower side of the straight line L1; the outline of the lace is fitted, and the area profiles W1 and W2 atthe lower part of the straight line L2 are reserved; by taking O as an original point, the straight line passing through the O point and parallel to the L1 is an X axis; by taking the direction fromleft to right as a positive direction, a Y axis passes through the circle center O and is vertical to the X axis; by taking the direction from the top to bottom as a positive direction, a coordinate system is established; the contour and point sets in the image are identified; the maximum width W is calculated; a maximum radius algorithm is calculated; a lace L1 and L2 length algorithm is calculated; and the maximum diameter is calculated and the abrasion loss is measured.

Description

technical field [0001] The invention belongs to the field of nuclear power detection, in particular to a method for measuring the wear amount of a control rod guide card based on an image recognition technology. Background technique [0002] The ECLIPSE equipment of AREVA in France can measure the wear amount of the control rod guide card through image recognition technology. This equipment drives the camera and light source to the detection position of a certain guide card through two sets of different mechanical equipment, and uses the backlight imaging method to extract the guide card. profile and calculate the amount of wear on the guide card. However, this method requires additional reflective equipment, the structure is complex, and the size and weight of the detection equipment are relatively large. Contents of the invention [0003] The purpose of the present invention is to provide a method for measuring the amount of wear of a control rod guide card based on ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01B11/24G06K9/00
CPCG01B11/00G01B11/24G06V20/10
Inventor 杨乾飞唐博唐岚曾晨明吴健荣束家龙张鹏飞汪双印马官兵
Owner CGNPC INSPECTION TECH
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