Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Use of Time Reversal Techniques for Focusing of Ultrasonic Array Transducer Beams

  • Kim, Hak-Joon (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Song, Sung-Jin (School of Mechanical Engineering, Sungkyunkwan University) ;
  • Thompson R. Bruce (Department of Aerospace Engineering, Center for NDE, Iowa State University) ;
  • Kim, Jae-Hee (Korea Atomic Energy Research Institute) ;
  • Eom, Heung-Sup (Korea Atomic Energy Research Institute)
  • Published : 2006.06.30
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Abstract

For enhancement of flaw detactability using array transducers, focusing of ultrasonic waves on a target in an inhomogeneous medium or through a complex geometry is important. But focusing can be strongly degraded by geometrical distortion of field radiated by the array transducers or by sound speed fluctuations in the propagating medium. In recent years, the time reversal technique has been proposed. Thus, in this paper, we describe the basic principal of the time reversal technique for focusing. Then, the implementation results of the time reversal technique for ultrasonic inspections using bulk waves and guided waves generated by array transducers are presented.

Keywords

References

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