A method for enhancing the characteristics of ultra-high-speed impact damage area

Abstract

The invention discloses a method for enhancing the characteristics of an ultra-high-speed impact damage area, which includes: extracting a typical transient thermal response of a defect; obtaining an infrared reconstruction image; separating the background area and the defect area of ​​the infrared reconstruction image; removing noise, The infrared image segmentation function is constructed under the guidance of the purpose of preserving details and edges; the multi-objective optimization algorithm combined with the segmentation model realizes one-time segmentation of the specimen defects in the infrared reconstructed image; according to the distance from the pixel point in the infrared image to the cluster center, the The pixels are divided into categories to obtain the segmented image of the damage defect in the infrared detection image. The invention utilizes multi-objective optimization theory to segment defects in infrared reconstructed images, constructs objective functions respectively for noise problems and edge blur problems, improves the segmentation accuracy of damaged defect areas, has high defect detection rate, low false detection rate, and bulge enhancement The ultra-high-speed impact damage defect area in the infrared reconstruction image is identified, which is convenient for the quantitative study of complex defects.

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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