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Ultrasonic phased array rapid full-focusing imaging detection method based on defect pre-positioning

An ultrasonic phased array, imaging detection technology, applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, measurement devices, etc. The effect of applying value, reducing the amount of data processing, and improving the time resolution

Inactive Publication Date: 2020-04-14
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

The accuracy of the plane wave imaging algorithm is low, but its ultra-fast imaging characteristics provide an effective way to improve the time resolution of the total focus imaging algorithm

Method used

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  • Ultrasonic phased array rapid full-focusing imaging detection method based on defect pre-positioning
  • Ultrasonic phased array rapid full-focusing imaging detection method based on defect pre-positioning
  • Ultrasonic phased array rapid full-focusing imaging detection method based on defect pre-positioning

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with specific embodiments. It should be understood that the following examples are only used to illustrate the present invention but not to limit the scope of the present invention.

[0030] Such as figure 1 Shown is an ultrasonic phased array fast all-focus imaging detection method based on defect pre-positioning according to an embodiment of the present invention, which uses an ultra-fast plane wave imaging algorithm to improve the ultrasonic phased array all-focus imaging method,

[0031] The ultrasonic phased array fast total focus imaging system used in the ultrasonic phased array fast total focus imaging detection method based on defect pre-location is as follows: figure 2 As shown, it includes: beam control delay system 1, which is used to establish different signal transceiver combinations and beam shapes; multi-channel ultrasonic transceiver system 2 and ultrasonic transducer 3, which are us...

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Abstract

The invention provides an ultrasonic phased array rapid full-focusing imaging detection method based on defect pre-positioning. The ultrasonic phased array rapid full-focusing imaging detection methodcomprises the steps of performing plane wave and full-matrix capture data collection on a target imaging area; carrying out coarse discretization processing on an imaging target imaging area, carrying out phase shift processing on the plane wave echo signal data set to obtain a plane wave imaging result, and carrying out pixel value analysis processing on the plane wave imaging result; carrying out defect positioning analysis on a plane wave imaging result through threshold processing, carrying out fine discretization processing on pixel points containing defects, and carrying out phase shiftprocessing on a full-matrix echo signal data set to obtain pixel values of the pixel points containing the defects; performing interpolation and amplification coefficient processing on unselected pixel points in the plane wave imaging result, and filling the corresponding grids with the pixel points; and obtaining a final imaging result. According to the method, an ultrasonic phased array plane wave algorithm and a full-focusing algorithm are combined, the time resolution is improved while the spatial resolution is kept, rapid ultrasonic phased array imaging detection is carried out on a component, and defects are effectively evaluated.

Description

technical field [0001] The invention belongs to the field of non-destructive testing, and relates to an ultrasonic phased array rapid all-focus imaging detection method based on defect pre-positioning. Background technique [0002] Ultrasonic phased array imaging detection technology is widely used in aerospace, railway, automobile, ship, petroleum, chemical industry, electric power and other fields because of its detection sensitivity and method flexibility. Among them, the ultrasonic phased array all-focus imaging algorithm has higher precision and larger dynamic range, and has a higher defect imaging capability than the current conventional phased-array ultrasonic inspection technology. It is called the gold standard of ultrasonic imaging. However, the full focus Imaging algorithms need to process a large number of array signals, which requires high hardware for imaging processing, resulting in low temporal resolution of imaging. [0003] In recent years, the omni-focus ...

Claims

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Application Information

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IPC IPC(8): G01N29/06G01N29/44
CPCG01N29/069G01N29/44G01N29/4409
Inventor 项延训轩福贞涂善东滕达朱武军杨斌
Owner EAST CHINA UNIV OF SCI & TECH
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