3P-14 ラム波トモグラフィにおける音線追跡アルゴリズムの検討(ポスターセッション)

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概要

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• This paper presents an investigation for ray tracing of Lamb wave utilizing a quantitative laser ultrasound visualization technique (QLUV) and two-dimentional wavefronts model. A novel technique called Lamb wave tomography had been made for image restructuring of the defect region information of specimen, including position, size and shape. Previous researches developed existing algorithm to restructure image in Lamb wave tomography. However these restructured algorithms are susceptible to refraction, strong scattering or abrupt change in the thickness and result inaccurate image reconstruction. This paper employs QLUV as experimental ray tracing method for Lamb wave propagating along samples suffering strong refraction on beam distortions. Based on the experimental ray tracing, the existing algorisms called Vidale's method are shown for comparison with QLUV method.

• 2010-12-06

著者

• Yang Che-hua

  National Taipei University Of Technology

• Wu Chia-Han

  National Taipei University of Technology

• Yang Che‐hua

  National Taipei Univ. Technol.

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