Health monitoring of smart structures using damage index sensors

Akira Mita, Shinpei Takahira

Research output: Contribution to journalConference article

6 Citations (Scopus)

Abstract

Simple and inexpensive passive sensors that can monitor the peak strain or displacement of a critical structural member were developed. The developed sensors have an ability to quickly assess the degree of damage in a structure when a checkup is needed. The sensors need no power supply for monitoring. The peak values can be retrieved wirelessly if desired. In addition, they can be easily modified to measure other damage indexes such as maximum acceleration and force. The mechanism to memorize the peak strain or displacement values relies on the pure plastic extension of sensing section. The pure plastic extension of the sensing section is made possible by introducing elastic buckling. The peak value is detected by measuring a change in electric resistance, inductance or capacitance. In addition, introduction of an LC circuit intohe sensor enabled wireless retrieval of the data. Theoretical and experimental studies exhibit the feasibility of the developed sensors for structural health monitoring of smart structures.

Original languageEnglish
Pages (from-to)92-99
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4696
DOIs
Publication statusPublished - 2002 Jan 1
EventSmart Structures and Materials 2002: Smart Systems for Bridges, Structures, and Highways - San Diego, CA, United States
Duration: 2002 Mar 182002 Mar 20

Keywords

  • Damage index
  • Health monitoring
  • Peak sensor
  • Smart structure

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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