Mechanical part stress corrosion detection method and system based on image processing

Abstract

The invention relates to the technical field of artificial intelligence, in particular to a mechanical part stress corrosion detection method and system based on image processing. The method comprises the following steps: obtaining an initial grayscale image of a mechanical part according to a weighted average method, identifying the defect probability of each pixel point to obtain a first detection result image, extracting an uncertain region in the first detection result image, and adaptively dividing the uncertain region into a plurality of first regions; extracting a neighborhood feature value of the pixel points of the first region, and obtaining a second gray level image according to a weighted average method; obtaining a second gradient according to the neighborhood feature value, obtaining an optimal statistical feature having the smallest difference with the standard statistical feature according to the second gradient, and further obtaining an optimal coefficient; and obtaining an optimal grayscale image by adopting the optimal coefficient, and obtaining a final detection result image according to the optimal grayscale image. Through the feature enhancement of the image, the detection accuracy of the stress corrosion area is improved, and the detection efficiency is also improved while the detection accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of artificial intelligence, in particular to a method and system for detecting stress corrosion of mechanical parts based on image processing. Background technique [0002] Stress corrosion is the failure phenomenon of mechanical parts or structures under the joint action of static stress and corrosion. Generally, stress corrosion belongs to brittle fracture, and there are three parts: incubation period, expansion period and transient interruption period. In order to prevent the influence of stress corrosion on mechanical parts and ensure the safety of mechanical parts operation, it is necessary to find stress corrosion defects in time during the incubation period or expansion period. [0003] At present, the test of stress corrosion performance and cracking performance can use the constant load crack sample method, through the loading of constant load / displacement, tracking the displacement change of crack...

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Problems solved by technology

[0003] At present, the test of stress corrosion performance and cracking performance can use the constant load crack sample method, through the loading of constant load / displacement, tracking the displacement change of crack gap opening, and obtaining the growth rate of stress corrosion crack, but this sample method is expensive. Long time, usually several weeks or months, high occupancy rate of equipment and low efficiency

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