A Method of Measuring the Wear Amount of Control Rod Guide Card 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: 2021-02-09
CGNPC INSPECTION TECH +3
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  • Abstract
  • Description
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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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  • A Method of Measuring the Wear Amount of Control Rod Guide Card Based on Image Recognition Technology
  • A Method of Measuring the Wear Amount of Control Rod Guide Card Based on Image Recognition Technology
  • A Method of Measuring the Wear Amount of Control Rod Guide Card Based on Image Recognition Technology

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Embodiment Construction

[0047] Below in conjunction with the embodiment shown in the accompanying drawings, the present invention is described in detail as follows:

[0048] A method for measuring the amount of wear of a control rod guide card based on image recognition technology, comprising the following steps,

[0049] (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.

[0050] (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 needs to be made 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 length ...

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Abstract

The invention discloses a method for measuring the wear amount of a control rod guide card based on image recognition technology, which mainly includes the following steps: image processing, measurement and calculation, and the measurement and calculation includes: fitting the outer circle of the guide card through the outline of the guide card to obtain the guide card The center O of the circular hole; according to the drawings, the theoretical upper and lower straight lines L1 and L2 of the guide card tether, the straight line on the same side as the tether on the center O is L2, and the straight line L2 is located on the lower side of the straight line L1; fit the contour of the tether, Reserve the area contours W1 and W2 at the lower part of the straight line L2; take O as the origin, the line passing through point O and parallel to L1 is the X axis, the positive direction from left to right, the Y axis passing through the origin O and perpendicular to the X axis, from Up to down is the positive direction, establish a coordinate system; identify the contour and point set in the image; calculate the maximum width W; calculate the maximum radius algorithm; calculate the lace L1, L2 length algorithm; calculate the maximum diameter, and measure the amount of wear.

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 Patents(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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