Ultrasonic non-destructive characterization method for structure uniformity of non-uniform medium

A non-homogeneous medium, uniform tissue technology, used in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, and processing response signals of detection, etc. It can solve the problem that tissue uniformity information is difficult to effectively decouple , ultrasonic scattering mechanism is complex, scatterer morphology is irregular, etc., to achieve good promotion and application prospects, overcome nonlinear and ill-posed problems, and easy to achieve.
CN112083068AActive Publication Date: 2020-12-15DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2020-12-15

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Abstract

The invention discloses an ultrasonic non-destructive characterization method for the structure uniformity of a non-uniform medium, and belongs to the technical field of ultrasonic non-destructive detection and evaluation of materials. Directed at the problems of complex ultrasonic scattering mechanism and difficulty in effective decoupling of tissue uniformity information caused by multiphase, nonhomogeneity, irregular scatterer morphology and large size change range in the ultrasonic non-destructive characterization process of the structure uniformity of the non-uniform medium, the ultrasonic non-destructive characterization method for the structure uniformity of the non-uniform medium adopts the ultrasonic pulse echo technology, and combines wavelet transform multi-scale analysis and asupport vector regression machine learning algorithm for non-destructive characterization on the non-uniform medium structure uniformity. The characterization method has the advantages of easy implementation, high robustness, high characterization precision and the like, overcomes the limitation that a traditional fitting method and a regularization method are difficult to deal with complex nonlinearity and ill-posedness problems of a physical mechanism, and has good application and popularization prospects.
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Description

technical field

[0001] The invention relates to an ultrasonic nondestructive characterization method for tissue uniformity in a heterogeneous medium, belonging to the technical field of ultrasonic nondestructive testing and evaluation of materials. Background technique

[0002] At present, the evaluation of the uniformity of heterogeneous media mainly adopts destructive detection methods, including mercury porosimetry, metallographic method, scanning electron microscope, electron probe and X-ray diffraction analysis. Although this type of method is intuitive, it is a destructive test method, and the local microscopic conditions are difficult to reflect the uniformity of the overall structure of the heterogeneous medium. Different from traditional destructive testing methods, non-destructive testing technology can use sound, heat, light, electricity, magnetism, etc. In response to changes in characteristics, judgments and evaluations are made on important characteristics suc...

Claims

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