Dynamic strain measurement system with fiber Bragg gratings and noise mitigation techniques

D. Tosi, M. Olivero, G. Perrone

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

A low-cost fiber Bragg grating (FBG) vibrometer specifically suited for structural monitoring and aimed at the detection of low-amplitude vibrations is presented. The optical system exploits an intensity modulation principle of operation, while signal processing techniques are used to complement the transducer to improve the performances: a recursive least-squares adaptive filter improves the noise power mitigation by 14 dB, and an efficient spectral estimator permits operating spectral analysis even under high noise conditions. With these methods, a strain sensitivity of 5.6 nε has been achieved in the 60 νε range. Experimental assessment tests carried out in typical structural monitoring contexts have demonstrated that the developed sensor is well suited to measure mechanical perturbations of different structures.

Original languageEnglish
Article number065203
JournalMeasurement Science and Technology
Volume20
Issue number6
DOIs
Publication statusPublished - Jan 1 2009
Externally publishedYes

Keywords

  • Adaptive signal processing
  • Estimation
  • Optical fiber sensors

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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