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Acoustical Imaging pp 597–608Cite as

High Resolution Ultrasonic Testing System Using Dynamic Focusing and Signal Correlation

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Part of the book series: Acoustical Imaging ((ACIM,volume 11))

Abstract

Progress in fracture mechanics has made it necessary to evaluate flaw sizes exactly (within 1 or 2 wave lengths) in order to predict lifetimes of structural materials. To meet this requirement, the azimuthal resolution of ultrasonic testing must be improved, without increasing handling difficulty. Phased array(1), holography, and synthetic aperture are presently the best techniques available for improving the resolution(2). In addition, the signal processing array(3) has been studied as a method for acquiring ultrasonic beams of sharp directivity without enlarging the transducer size.

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References

  1. J. C. Somer, Electronic Sector Scanning for Ultrasonic Diagnosis, Ultrasonics 21: 153 (1968).

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  2. G. S. Kino, Acoustic Imaging for Nondestructive Evaluation, Proc. of IEEE 67: 510 (1979).

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  3. D. D. Lobdell, A Nonlinear Processed array for Enhanced Azimuthal Resolution, IEEE Trans. Son. and Ultrason. su-15: 202 (1968).

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  4. J. Krautkramer and H. Krautkramer, “Ultrasonic Testing of Materials”, 2nd Ed., Springer, NY (1977).

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  5. K. Kimura, Design Method of Angled Shear Wave Focusing Transducer (in Japanese), Research Materials of NDI No.2644, Japan Soc. of NDI (1977).

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Author information

Authors and Affiliations

  1. Hitachi Research Laboratory, Hitachi, Ltd., Hitachi-shi, Ibaraki-ken, 319-12, Japan

    Jun Kubota, Junichi Ishii & Soji Sasaki

Authors
  1. Jun Kubota
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  2. Junichi Ishii
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  3. Soji Sasaki
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Editor information

Editors and Affiliations

  1. Naval Postgraduate School, Monterey, California, USA

    John P. Powers

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© 1982 Plenum Press, New York

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Kubota, J., Ishii, J., Sasaki, S. (1982). High Resolution Ultrasonic Testing System Using Dynamic Focusing and Signal Correlation. In: Powers, J.P. (eds) Acoustical Imaging. Acoustical Imaging, vol 11. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-1137-9_39

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  • DOI: https://doi.org/10.1007/978-1-4684-1137-9_39

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-1139-3

  • Online ISBN: 978-1-4684-1137-9

  • eBook Packages: Springer Book Archive

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