2012
DOI: 10.1784/insi.2012.54.7.371
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Virtual source aperture imaging for non-destructive testing

Abstract: SAFT

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Cited by 22 publications
(8 citation statements)
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“…In this paper, the VSA technique has been developed as a data acquisition and imaging system, with improved resolution and SNR than in previous work [5] . The ability of FMC+TFM to fully exploit the focusing capabilities of an array transducer allows for increased resolution compared to traditional B-scanning implementations, and the averaging effect is shown to provide a significant improvement in SNR.…”
Section: Measuring Performancementioning
confidence: 99%
See 1 more Smart Citation
“…In this paper, the VSA technique has been developed as a data acquisition and imaging system, with improved resolution and SNR than in previous work [5] . The ability of FMC+TFM to fully exploit the focusing capabilities of an array transducer allows for increased resolution compared to traditional B-scanning implementations, and the averaging effect is shown to provide a significant improvement in SNR.…”
Section: Measuring Performancementioning
confidence: 99%
“…This increase in energy provides an improvement in SNR while reducing the number of transmissions to just a single firing. The technique has been further explored for its applicability to non-destructive testing (NDT) and combined with a SAFT-like imaging algorithm, where it is known as the virtual source aperture (VSA) technique [5] . In this work, a comparison of conventional SAFT, VSA and TFM is presented, where the resolution is shown as being comparable to that of TFM.…”
Section: Introductionmentioning
confidence: 99%
“…A Hilbert transform h [14] is used to obtain the complex component of the signal with pixel intensity values I(x, z) calculated for each pixel and tx, rx combination. Details of this algorithm can be found in [1,13,15] : …”
Section: Full Matrix Capturementioning
confidence: 99%
“…Dynamic focusing of ultrasonic emission and reception is realized, which enriches defect information and improves imaging resolution [2][3][4][5]. However, in the solution of the full-field sound field [6][7][8][9], full-focus imaging technology inevitably produces artifacts due to the isoacoustic path line diffusion and ultrasonic sidelobe energy leakage [10,11]. Such artifacts are related to the principle of full-focused ultrasonic detection, which is not convenient for direct elimination and affects the subsequent qualitative and quantitative analysis of defects [12][13][14].…”
Section: Introductionmentioning
confidence: 99%