Superspeed impact damage area feature strengthening method

Abstract

The invention discloses a superspeed impact damage area feature strengthening method. The method comprises the following steps: extracting typical transient thermal response of a defect; obtaining an infrared reconstruction image; separating a background area and a defect area of the infrared reconstructed image; constructing an infrared image segmentation function under the guidance of noise removal, detail reservation and edge maintenance; combining a multi-objective optimization algorithm with the segmentation model to realize one-time segmentation of test piece defects in the infrared reconstructed image; and performing category division on the pixel points according to the distance from the pixel points in the infrared image to the clustering center to obtain a segmented image of the damage defect in the infrared detection image. According to the method, defect segmentation in the infrared reconstructed image is carried out by utilizing a multi-objective optimization theory, objective functions are respectively constructed aiming at a noise problem and an edge blurring problem, the segmentation precision of the damage defect area is improved, the defect detection rate is high, the false detection rate is low, the ultra-high-speed impact damage defect area in the infrared reconstructed image is convexly strengthened, and quantitative research of complex defects is facilitated.

Description

technical field [0001] The invention belongs to the technical field of spacecraft maintenance support and on-orbit risk assessment, and more specifically, the invention relates to a method for enhancing the characteristics of a hypervelocity impact damage area. Background technique [0002] During launch and in-orbit operation, spacecraft are extremely vulnerable to accidental impacts from various tiny objects, such as space junk fragments, tiny meteoroids, and peeled off coatings. In particular, the ever-increasing space junk debris is the most harmful to on-orbit spaceflight. Because the tiny debris has a very high impact speed (usually reaching several kilometers per second or even tens of kilometers per second), it is easy to cause various types of debris on the surface of the spacecraft. Hypervelocity impact damage, such as perforation, impact crater, spallation, spalling, etc., causes the structure of the spacecraft to be damaged or the function of the component to dec...

AI Technical Summary

Problems solved by technology

If only the segmentation model is used, the weight coefficients corresponding to the objective functions to achieve the three segmentation performances when forming the segmentation function are to be determined, and continuous debugging is required to determine the weight coefficients to control the balance between each objective function, and the computational efficiency and universality of the algorithm The performance is low, and the segmentation quality of the final infrared reconstructed image cannot be guaranteed

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