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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.

Active Publication Date: 2020-12-15
DALIAN UNIV OF TECH
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Problems solved by technology

Aiming at the problem of multiphase, heterogeneity, irregular scatterer shape and large size change range in the process of non-destructive ultrasonic characterization of tissue homogeneity in heterogeneous media, the ultrasonic scattering mechanism is complex and the tissue uniformity information is difficult to effectively decouple. Echo technology, combined with wavelet transform multi-scale analysis and support vector regression machine learning algorithm for non-destructive characterization of tissue homogeneity in heterogeneous media

Method used

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

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing and embodiment the patent of the present invention is described further.

[0047] The experimental sample in this example is the AlSi-polyester sealing coating sample 5. This non-destructive ultrasonic characterization method for the uniformity of the heterogeneous medium structure uses an ultrasonic flaw detector 2, a water immersion ultrasonic probe 4, a digital oscilloscope 3, a three-dimensional precision The ultrasonic pulse echo detection system (such as figure 1 As shown), the water immersion ultrasonic probe 4 is electrically connected to the three-dimensional precision motion device 1, the ultrasonic flaw detector 2 and the AlSi-polyester sealing coating 5, the three-dimensional precision motion device 1 and the ultrasonic flaw detector 2 are electrically connected to the digital oscilloscope 3, and the digital oscilloscope 3 Electrically connect computer 6 . The method takes the following steps:

[0048] a) Samp...

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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.

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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Application Information

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IPC IPC(8): G01N29/04G01N29/44G01N23/046G01N1/28
CPCG01N1/286G01N23/046G01N29/04G01N29/449G01N2291/023
Inventor 林莉马志远张伟雷明凯
Owner DALIAN UNIV OF TECH
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