Jpn. J. Appl. Phys. 50 (2011) 07HC06 (7 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Noncontact Monitoring of Surface Temperature Distribution by Laser Ultrasound Scanning

Hiroyuki Yamada, Akira Kosugi, and Ikuo Ihara

(Received December 13, 2010; accepted March 18, 2011; published online July 20, 2011)

A laser ultrasound scanning method for measuring a surface temperature distribution of a heated material is presented. An experiment using an aluminum plate heated up to 120 °C is carried out to verify the feasibility of the proposed method. A series of one-dimensional surface acoustic wave (SAW) measurements within an area of a square on the aluminum surface are performed by scanning a pulsed laser for generating SAW using a galvanometer system, where the SAWs are detected at a fixed location on the surface. An inverse analysis is then applied to SAW data to determine the surface temperature distribution in a certain direction. The two-dimensional distribution of the surface temperature in the square is constructed by combining the one-dimensional surface temperature distributions obtained within the square. The surface temperature distributions obtained by the proposed method almost agrees with those obtained using an infrared radiation camera.

URL: http://jjap.jsap.jp/link?JJAP/50/07HC06/
DOI: 10.1143/JJAP.50.07HC06
PACS: 43.38.Rh, 07.20.Dt, 43.35.Ud

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