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Proceedings Paper

Integrated surface and plate acoustic wave sensors for health monitoring
Author(s): C.-K. Jen; K.-T. Wu; M. Kobayashi; J.-H. Kuo; N. Mrad
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Paper Abstract

Piezoelectric films sprayed onto metal substrates together with interdigital transducer electrodes form the integrated Rayleigh surface acoustic wave (RAW) transducers to excite and detect RAW. Using integrated longitudinal (L) wave ultrasonic transducers (UTs) and mode conversion from L waves to shear waves symmetrical, anti-symmetrical and shear horizontal types of guided plate acoustic waves have been generated and received in aluminum alloy plates. These transducers can be operated in pulse-echo mode for in-situ non-destructive testing (NDT) and/or health monitoring purposes in a distance of hundreds of mini-meters at 150°C. Examples of using such waves for NDT of defects are also demonstrated.

Paper Details

Date Published: 11 April 2007
PDF: 8 pages
Proc. SPIE 6532, Health Monitoring of Structural and Biological Systems 2007, 653206 (11 April 2007); doi: 10.1117/12.715290
Show Author Affiliations
C.-K. Jen, National Research Council of Canada (Canada)
K.-T. Wu, McGill Univ. (Canada)
M. Kobayashi, National Research Council of Canada (Canada)
J.-H. Kuo, National Research Council of Canada (Canada)
N. Mrad, Defence R&D Canada (Canada)


Published in SPIE Proceedings Vol. 6532:
Health Monitoring of Structural and Biological Systems 2007
Tribikram Kundu, Editor(s)

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