Quick phased array ultrasonic whole-focusing imaging technology

A phased array, all-focusing technology, used in the analysis of solids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, and measurement devices, etc., can solve problems such as the difficulty in popularizing portable ultrasonic phased array flaw detectors. , to achieve good promotion and application prospects, and achieve high-precision quantitative results

Inactive Publication Date: 2018-10-23
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

Although multi-core hardware acceleration methods can significantly improve computing efficiency, these high-performance hardware are only configured on workstation computers at this stage, and it is difficult to popularize them in portable ultrasonic phased array flaw detectors in a short period of time

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  • Quick phased array ultrasonic whole-focusing imaging technology
  • Quick phased array ultrasonic whole-focusing imaging technology
  • Quick phased array ultrasonic whole-focusing imaging technology

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the drawings and embodiments. See Figure 1 to Figure 5 , A fast phased array ultrasonic all-focus imaging technology, taking 128 elements to detect a 20mm deep Φ2 side hole in a 40mm thick carbon steel test block as an example, including the following steps:

[0029] 1) Such as figure 1 As shown, an independent 128-channel ultrasonic signal acquisition system is built through a phased array probe 1, a multi-channel selector 2, an ultrasonic signal transmitter and receiver 3, a digital oscilloscope 4, and a computer terminal 5. Among them, the phased array probe 1 is connected to the multi-channel selector 2. The multi-channel selector 2 and the ultrasonic signal transmitter receiver 3 are connected through the transmitting interface TX and the receiving interface RX. The multi-channel selector 2 is connected to the computer terminal 5. The ultrasonic signal transmitter receiver 3 and the digital o...

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Abstract

The invention discloses a quick phased array ultrasonic whole-focusing imaging technology, which includes steps of: separating a collected full-matrix data A*NRX*NTX into N two-dimensional sub-matrixdata An*NRX; performing virtual focusing to all sub-matrix data by means of algorithm based on two-dimensional forward / inverse Fourier transform; performing circulation calculation to acquire the two-dimensional focusing images of the first to Nth sub-matrixes; finally fusing the two-dimensional focusing images of all sub-matrixes to form the whole-focusing image. The method is expected to solve aproblem that a phased array ultrasonic fault detector cannot achieve real-time whole-focusing imaging, can quickly and effectively achieve high-precise quantization, positioning and qualification tointernal defects of materials, and has great promotion and application prospect.

Description

Technical field [0001] The invention relates to the field of ultrasonic nondestructive testing, in particular to a fast phased array ultrasonic all-focus imaging technology based on two-dimensional forward / inverse Fourier transform. Background technique [0002] Total focusing method (TFM) is a phased array ultrasound post-processing imaging technology that has emerged in recent years. Compared with traditional phased array imaging technology, this technology is an offline imaging technology that relies on full matrix capture (FMC), which overcomes the shortcomings of the limited number of emitted sound beams in the traditional technology, and through offline processing Realize the focus of the entire inspected area. Research shows that, compared with the B-type, C-type, D-type, and S-type views provided by traditional phased arrays, TFM images have higher detection signal-to-noise ratio and resolution, and their defect detection capabilities and quantitative accuracy are higher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/06
CPCG01N29/0654
Inventor 陈尧卢超
Owner NANCHANG HANGKONG UNIVERSITY
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