Paper Title:
Metrological Performances of Smart Structures Based on Bragg Grating Sensors
  Abstract

The fiber optic Bragg grating (FBG) sensors have been recently introduced: they presenta photo-record grating on the fiber itself, which allows the reflection of a certain wavelength of theinput light spectrum. The applied strain is estimated based on changes of the reflected wavelength.The metrological characteristics of FBGs have been tested and compared to strain gages ones, whichrepresent the actual reference measurement systems. It was decided to integrate the measurementsystem directly into a composite material, having achieved good results during the static and dynamictests [1]. We made carbon fiber specimens (two for traction and two for bending tests) with FBGsintegrated into them. The results were surprising: the integration of ``nude'' fiber optic sensor didnot cause damage or deterioration in the quality of measurement, the signal noise was maintained atbaseline levels and response to dynamic stress was definitely comparable to that offered by electricalstrain gauges

  Info
Periodical
Edited by
E. Hristoforou and D.S. Vlachos
Pages
41-44
DOI
10.4028/www.scientific.net/KEM.495.41
Citation
E. De Cais, M. Borotto, M. Belloli, A. Bernasconi, S. Manzoni, "Metrological Performances of Smart Structures Based on Bragg Grating Sensors", Key Engineering Materials, Vol. 495, pp. 41-44, 2012
Online since
November 2011
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