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Notice of retraction
Vol. 34, No. 8(3), S&M3042

Notice of retraction
Vol. 32, No. 8(2), S&M2292

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Sensors and Materials
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Sensors and Materials, Volume 32, Number 2(3) (2020)
Copyright(C) MYU K.K.
pp. 791-797
S&M2137 Research Paper
https://doi.org/10.18494/SAM.2020.2659
Published: February 28, 2020

Detection of Drilled Hole on Subsurface of Aluminum Plate with Rayleigh Ultrasonic Wave Field by Laser Probing [PDF]

Kazuhiko Imano

(Received October 23, 2019; Accepted January 23, 2020)

Keywords: laser probe method, Rayleigh wave, phase change, A0 mode Lamb wave, mode conversion, FEM analysis

A drilled hole with a diameter of less than or equal to the wavelength of a surface acoustic wave on the subsurface of an aluminum plate is detected by laser probing. The holes that could not be detected by a conventional method are detected from the phase change of the Rayleigh wave included in the reflected laser light. Experiments involving 5 MHz Rayleigh waves propagating along the surface of an aluminum plate are performed by laser probing. Finite element method (FEM) analysis reveals mode conversion from a Rayleigh wave to an A0 mode Lamb wave between the drilled hole and the material surface. The phase change at the edge of the drilled hole that causes the difference in sound velocity between the Rayleigh and Lamb waves is also described.

Corresponding author: Kazuhiko Imano


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Cite this article
Kazuhiko Imano, Detection of Drilled Hole on Subsurface of Aluminum Plate with Rayleigh Ultrasonic Wave Field by Laser Probing, Sens. Mater., Vol. 32, No. 2, 2020, p. 791-797.



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