Broadband source-based interrogation scheme of fiber Bragg grating sensors for structural health monitoring

Daniele Tosi, Massimo Olivero, Guido Perrone

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In the present work we report on the development of a low cost interrogation system of fiber Bragg grating sensors for structural health monitoring. The developed scheme uses two gratings and a directional coupler as sensing point, and it includes self-compensation of temperature effects. The reading equipment consists of a standard photodiode for telecom applications with custom signal-conditioning electronics. The characterization of multiplexed sensors, carried out in real framework conditions, shows that the system can work in a temperature range of -20H-40°C, making strain measurements up to at least 320με with an accuracy of ∼3% and an acquisition rate of 12 samples/min. Further, a budget evaluation is drawn to asses the feasibility of our interrogation system as a low cost solution to increase the extent of structural health monitoring in funds-limited applications.

Original languageEnglish
Pages (from-to)399-404
Number of pages6
JournalKey Engineering Materials
Volume347
DOIs
Publication statusPublished - Jul 2 2007
Externally publishedYes

Keywords

  • Building health monitoring
  • Fiber bragg gratings (FBG)
  • Fiber optic sensor (FOS)
  • Optical fiber transducers
  • Strain measurement
  • Structural engineering

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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