Enhancement of Flaw Detectability Using Time Reversal Techniques

Hak Joon Kim; R. Bruce Thompson; Sung Jin Song

doi:10.4028/www.scientific.net/SSP.120.113

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The Study of Fatigue Crack Growth of 304SS with the Influence of Loading Frequency and Temperature
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Enhancement of Flaw Detectability Using Time Reversal Techniques
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HomeSolid State PhenomenaSolid State Phenomena Vol. 120Enhancement of Flaw Detectability Using Time...

Enhancement of Flaw Detectability Using Time Reversal Techniques

Abstract:

Ultrasonic phased array inspection has been paid a great attention in ultrasonic nondestructive evaluation since it can provide a benefit of focusing and/or steering ultrasonic beams. A time reversal technique is claimed to be very robust to focus beams through inhomogeneous media, using the phased array transducers. In this paper, the performance and limitations of a D.O.R.T. method, which is one of the time reversal techniques, is considered based on the experimental studies. In addition, a variation of the D.O.R.T, namely a pre-focused D.O.R.T., is proposed in order to overcome the limitations of the current D.O.R.T. method. The results of the newly proposed method are compared to those obtained by conventional focusing methods.

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Periodical:

Solid State Phenomena (Volume 120)

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113-118

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.120.113

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Online since:

February 2007

Authors:

Hak Joon Kim, R. Bruce Thompson, Sung Jin Song

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Enhancement of Flaw Detectability, Phased Array, Time Reversal Technique

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References

[1] M. Fink, Time reversal of ultrasonic field-Part I: Basic principles, IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 39, pp.555-566, (1992).

DOI: 10.1109/58.156174

Google Scholar

[2] M. Fink, D. Cassereau, A. Derode, C. Parada, P. Roux, M. Tanter., J. Thomas and F. Wu, Time-reversed Acoustics, Rep. Prog. Phys. 63, pp.1933-1995, (2000).

DOI: 10.1088/0034-4885/63/12/202

Google Scholar

[3] N. Chakroun, M. Fink and F. Wu, Time Reversal Processing in Ultrasonic Nondestructive Testing, IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 42, pp.1087-1098, (1995).

DOI: 10.1109/58.476552

Google Scholar

[4] C. Prada and M. Fink, Separation of interfering acoustic scattered signals using the invariants of the time-reversal operator. Application to Lamb waves characterization, Journal of Acoust. Soc. Am., 104, pp.801-807, (1998).

DOI: 10.1121/1.423354

Google Scholar

[5] C. Prada, S. Manneville, D. Spoliansky and M. Fink, Decomposition of the time reversal operator: Detection and selective focusing on two scatterers, Journal of Acoust. Soc. Am., 99, pp.2067-2076, (1996).

DOI: 10.1121/1.415393

Google Scholar

[6] C. Parada, J. Thomas and M. Fink, The iterative time reversal process: Analysis of the convergence, Journal of Acoust. Soc. Am., 97, pp.62-71, (1995).

Google Scholar