Advertisement

A Real-Time Synthetic-Aperture Imaging System

  • P. D. Corl
  • G. S. Kino
Part of the Acoustical Imaging book series (ACIM, volume 9)

Abstract

A synthetic-aperture acoustic imaging system has been developed which employs digital electronics to perform real-time imaging with a 32-element acoustic transducer array. This system has also been implemented on a computer (not real-time) so that new concepts can be tested before they are implemented in hardware. A number of real-time and computer-reconstructed images are presented to illustrate the performance of this system, including images obtained using longitudinal waves in a water tank and Rayleigh (surface) waves on aluminum samples. Computer-generated contour plots are shown to illustrate the point response of this system and to demonstrate the resolution and sidelobe levels obtained with this synthetic-aperture technique.

Keywords

Rayleigh Wave Transducer Array Acoustic Imaging Sidelobe Level Transducer Element 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    P. D. Corl, G. S. Kino, C. S. DeSilets and P. M. Grant, “A Digital Synthetic Focus Acoustic Imaging System,” to be published in Acoustical Imaging and Holography, Vol. 8, A. F. Metherell (ed.), Plenum Press, New York, (1978).Google Scholar
  2. 2.
    P. D. Corl, P. M. Grant, and G. S. Kino, “An Imaging System for NDE,” Proc. of the 1978 IEEE Ultrasonics Symposium, Cherry Hill, New Jersey.Google Scholar
  3. 3.
    C. S. DeSilets, A. Selfridge, and G. S. Kino, “Highly Efficient Transducer Arrays Useful in Nondestructive Testing Applications,” Proc. of the 1978 IEEE Ultrasonics Symposium, Cherry Hill, New Jersey.Google Scholar
  4. 4.
    G. S. Kino, B. T. Khuri-Yakub, A. Selfridge, and H. Tuan, “Development of Transducers for NDE,” to be published in Proc. ARPA/AFML Review of Progress in Quantitative NDE, La Jolla, California, July, 1979.Google Scholar
  5. 5.
    T. M. Waugh, and G. S. Kino, “Real Time Imaging with Shear Waves and Surface Waves,” Acoustical Holography, Vol. 7, L.W. Kessler (ed.), Plenum Press, New York, 103–115, (1977).Google Scholar
  6. 6.
    H. Uberall, L. R. Dragonette, and L. Flax, “Relation Between Creeping Waves and Normal Modes of Vibration of a Curved Body,” J. Acoust. Soc. Am., Vol. 61, No. 3, March, 1977.Google Scholar
  7. 7.
    G. S. Kino, “Acoustic Imaging for Nondestructive Evaluation,” Proc. IEEE, Vol. 67, 510–527 (1979).ADSCrossRefGoogle Scholar
  8. 8.
    G. S. Kino, “New Techniques for Acoustic Non-Destructive Testing,” ARPA-AFML Interdisciplinary Program for Quantitative Flaw Detection, Contract F33615-74-C-5180, Annual Progress Report, January 1979.Google Scholar
  9. 9.
    J. D. Achenbach, A. K. Gantesen, and H. C. McMaken, “Diffraction of Elastic Waves by Cracks — Analytic Results,” Elastic Waves and Nondestructive Testing of Materials, AMD-Vol. 29, Y. H. Pao (ed.), ASME (1978).Google Scholar
  10. 10.
    A. Macovski, “Ultrasonic Imaging Using Arrays,” Proc. IEEE, Vol. 67, 484–495 (1979).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • P. D. Corl
    • 1
  • G. S. Kino
    • 1
  1. 1.Ginzton LaboratoryStanford UniversityStanfordUSA

Personalised recommendations