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Calculations of Radiation Field of Phased Array Transducers Using Boundary Diffraction Wave Model

Sung-Jin Song, Hyeon Jae Shin, You Hyun Jang
School of Mechanical Engineering and Safety and Structural Integrity Research Center
Sungkyunkwan University
300 Chunchun-dong, Changan-gu,
Suwon, 440-746
Republic of Korea
Contact

Abstract

Introduction

Boundary Diffraction Wave Model

Simulation

Fig 4: Radiation fields from the array transducer when the beam is focused at (a) infinity without steering, (b) F2, (c) F5, and (d) F10 by electronic delay time.

Fig 8: The variation of (a) lateral size of focal point and (b) amplitude with frequency when the beam is focused at F3. (c) The predicted transient waveform at F2 by simulation.

Concluding Remarks

Acknowledgements

References

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  2. L. Azar and S. C. Whoo, "Experimental Characterization of Ultrasonic Phased Arrays for the Nondestructive Evaluation of Concrete Structures," Materials Evaluations, Vol. 75, No. 2, pp. 134-140, 1999.
  3. G. S. Kino, Acoustic Waves: Devices, Imaging, and Analog Signal Processing, Englewood Cliffs, NJ: Prentice-Hall, 1987.
  4. L. W. Schmerr, Jr, Fundamentals of Ultrasonic Nondestructive Evaluation, A Modeling Approach, Plenum Press, New York, pp. 167-181, 1998.
  5. L. W. Schmerr, Jr, A. Sedov, T. P. Lerch, "A boundary diffraction wave model for a spherically focused ultrasonic transducer," The Journal of the Acoustical Society of America. Vol.101, No. 3, pp. 1269-1277, 1997.
  6. S. J. Song and H. J. Kim, "Modeling of Radiation Beams from Ultrasonic Transducers in a Single Medium," Journal of the Korean Society for Nondestructive Testing, Vol. 20, No. 2, 2000. (in press)

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