A valve basic parameter detection method, system, device and medium

By performing image correction and rotation correction on the valve image, the limitation of existing technologies that can only detect under standard image conditions is overcome, and high-precision valve parameter detection under non-standard conditions is achieved, including rapid and accurate detection of dimensions and surface defects.

CN115511785BActive Publication Date: 2026-06-12GUIZHOU MINZU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUIZHOU MINZU UNIV
Filing Date
2022-08-25
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing valve inspection methods can only complete the inspection if the captured images are very standard, which is not practical and has low inspection accuracy. In particular, it is impossible to accurately detect the size and surface defects of the valve when there is environmental interference or angle tilt.

Method used

Image correction processing is performed on the image to be detected, including grayscale conversion, filtering, edge detection, and line detection. The target straight line segment is determined by Hough transform, and rotation correction is performed by affine transformation matrix to establish an image coordinate system and calculate valve diameter and groove radius. At the same time, a heat map is generated by mapping the pixels of multiple rotated images to detect surface defects.

Benefits of technology

It achieves high-precision valve parameter detection under conditions of interference and angular tilt, improving detection efficiency and accuracy. It can quickly and accurately determine valve diameter, groove radius and surface defects, and is applicable to the basic parameter detection of other industrial devices.

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Abstract

The application discloses a valve basic parameter detection method, system, device and medium, and relates to the technical field of image processing. The method comprises the following steps: acquiring a to-be-detected image containing a valve; performing image correction processing on the to-be-detected image to obtain a target image; and determining the size parameter of the valve according to the target image, wherein the size parameter comprises at least one of the valve diameter and the groove radius on the valve. The application can quickly and accurately automatically detect the size parameter of the valve, including the valve diameter and the groove radius on the valve, has robustness and real-time performance, greatly improves the valve detection efficiency, and greatly improves the production efficiency of the valve. The method can detect the valve basic parameter with high precision in the case that the photographed image has interference pixels and has an angle tilt, and the method can be applied to the basic parameter detection of other industrial devices.
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