Flange surface defect detection method, system and equipment

Abstract

The invention belongs to the technical field of industrial product appearance detection, and particularly relates to a flange surface defect detection method, system and equipment. The flange surfacedefect detection method comprises the steps: obtaining a to-be-detected flange image, and positioning a target region which at least comprises a flange end surface, a central bolt hole and a flange back surface; performing semantic segmentation on the target area to determine a to-be-detected area; obtaining candidate pixel points with defect characteristics in the to-be-detected area by utilizingthe gray scale difference of the pixel neighborhood blocks; performing morphological operation and connected domain analysis on the candidate pixel points to obtain a candidate defect position image;and carrying out classification and identification on the candidate defect position images by utilizing the trained and optimized image identification network model, removing flange surface pseudo defects and counting defect feature information. The method can effectively improve the automation degree of flange surface detection, improves the accuracy of flange product surface defect detection, reduces the labor intensity, and has a good application value.

Description

technical field [0001] The invention belongs to the technical field of industrial product appearance inspection, and in particular relates to a flange surface defect inspection method, system and equipment. Background technique [0002] At present, flanges are widely used in the mechanical field because of their characteristics of convenient connection and high pressure resistance. Especially in various industrial pipelines, flange connections are widely used, and the demand for flange plates is particularly large, which also puts forward higher requirements for flange quality. [0003] However, due to factors such as casting materials, temperature, equipment extrusion, friction, and physical scratches and bumps during the transmission process of the flange during the production process, sand holes, ungrinded, scratches, and bumps will appear on the flange surface. Injury and other defects. These defects will not only affect the appearance of the product, but may also affe...

AI Technical Summary

Problems solved by technology

However, due to factors such as a wide variety of products and complex backgrounds, the defects have different shapes, and the traditional machine learning representation learning ability is limited, so it is difficult to achieve high accuracy and robustness.

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