Structural health monitoring system using FBG sensor for simultaneous detection of acceleration and strain

Hiroshi Hayano, Akira Mita

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

Structural health monitoring systems are being recognized as effective tools to minimize maintenance costs for civil infrastructures. Recently, many damage evaluation methods for the systems have been proposed. For example, natural frequencies were used for global monitoring, and strain measurement for local monitoring. In this study, a novel monitoring system that measures two physical values simultaneously, acceleration and strain, by a single sensor is proposed. At first, a hybrid FBG sensor for monitoring strain and acceleration is proposed. The sensor consists of an FBG element and a mass to form a vibration system. Then, a monitoring system using the hybrid FBG sensor and support vector machines is proposed. Many damage scenarios for a moment-resistant frame were tested. The results show that the sensitivities of strain and natural frequency are significantly different. It is confirmed that combined use of acceleration and strain measurement enhances the performance of the system.

Original languageEnglish
Article number65
Pages (from-to)624-633
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5765
Issue numberPART 2
DOIs
Publication statusPublished - 2005 Sep 29
EventSmart Structures and Materials 2005 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems - San Diego, CA, United States
Duration: 2005 Mar 72005 Mar 10

Keywords

  • Acceleration measurement
  • Bridge
  • FBG
  • Natural frequency
  • Strain measurement
  • Support vector machine

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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