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Proceedings Paper

Structural health monitoring by high-frequency vibration measurement with non-contact laser excitation
Author(s): I. Kajiwara; D. Miyamoto; N. Hosoya; C. Nishidome
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Paper Abstract

This paper proposes a vibration testing and health monitoring system based on an impulse response excited by a laser ablation. High power YAG pulse laser is used for producing an ideal impulse force on structural surface. It is possible to measure high frequency vibration responses in this system. A health monitoring system is constructed by this vibration testing system and a damage detecting algorithm. A microscopic damage of structures can be extracted by detecting fluctuations of high frequency vibration response with the present health monitoring system. In this study, loosening of bolt tightening torques is defined as the damage of the system. The damage is detected and identified by statistical evaluations with Recognition-Taguchi method.

Paper Details

Date Published: 31 March 2011
PDF: 12 pages
Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79841K (31 March 2011); doi: 10.1117/12.879355
Show Author Affiliations
I. Kajiwara, Hokkaido Univ. (Japan)
D. Miyamoto, Hokkaido Univ. (Japan)
N. Hosoya, Shibaura Institute of Technology (Japan)
C. Nishidome, Hokkaido Univ. (Japan)

Published in SPIE Proceedings Vol. 7984:
Health Monitoring of Structural and Biological Systems 2011
Tribikram Kundu, Editor(s)

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