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

I. Kajiwara; D. Miyamoto; N. Hosoya; C. Nishidome

doi:10.1117/12.879355

31 March 2011 Structural health monitoring by high-frequency vibration measurement with non-contact laser excitation

I. Kajiwara, D. Miyamoto, N. Hosoya, C. Nishidome

Proceedings Volume 7984, Health Monitoring of Structural and Biological Systems 2011; 79841K (2011) https://doi.org/10.1117/12.879355
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

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.

Citation Download 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 (31 March 2011); https://doi.org/10.1117/12.879355

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