Health monitoring based on high frequency vibration measurement with laser

Daisuke Miyamoto, Itsuro Kajiwara, Naoki Hosoya, Chiaki Nishidome

Research output: Contribution to journalArticle

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 in this system 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 of measured frequency response data with Recognition-Taguchi method.

Original languageEnglish
Pages (from-to)1760-1771
Number of pages12
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume77
Issue number777
Publication statusPublished - 2011 Dec 1

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Keywords

  • Health monitoring
  • Impact testing
  • Impulse response
  • Laser ablation
  • MT method
  • RT Method

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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