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Proceedings Article

Structural health monitoring by high-frequency vibration measurement with non-contact laser excitation

[+] Author Affiliations
I. Kajiwara, D. Miyamoto, C. Nishidome

Hokkaido Univ. (Japan)

N. Hosoya

Shibaura Institute of Technology (Japan)

Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79841K (March 31, 2011); doi:10.1117/12.879355
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From Conference Volume 7984

  • Health Monitoring of Structural and Biological Systems 2011
  • Tribikram Kundu
  • San Diego, California, USA | March 06, 2011

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.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

I. Kajiwara ; D. Miyamoto ; N. Hosoya and C. Nishidome
"Structural health monitoring by high-frequency vibration measurement with non-contact laser excitation", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79841K (March 31, 2011); doi:10.1117/12.879355; http://dx.doi.org/10.1117/12.879355


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