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Proceedings Paper

Definition of FBG sensor photoelastic coeffecient by laser doppler vibrometery
Author(s): Barbara Marchetti; R Montanini; C Rondini; P Maggiorana; Gianluca L. Rossi
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Paper Abstract

In this work a system for static and dynamic calibration of in-fibre Bragg grating sensors (FBG), is described. Our idea starts from the calibration procedure of strain gauges that is done by applying a pure bending on the sample. The aim of this work is to develop a system that allows as to apply an analogous experimental technique. In this case we use as reference a Laser Vibrometer, and therefore to the sample a dynamic excitation by an electrodynamic actuator. The test bench is used to apply a sinusoidal force in a symmetrical way in order to obtain an alternate pure bending in the area where the sensor is glued on the structure. The greatest excitation frequency, limited by the characteristics of FBG interrogation system, is about 20 Hz.

Paper Details

Date Published: 22 May 2002
PDF: 11 pages
Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); doi: 10.1117/12.468171
Show Author Affiliations
Barbara Marchetti, Univ. degli Studi di Ancona (Italy)
R Montanini, Univ. degli Studi di Messina (Italy)
C Rondini, Univ. degli Studi di Perugia (Italy)
P Maggiorana, Univ. degli Studi di Perugia (Italy)
Gianluca L. Rossi, Univ. degli Studi di Perugia (Italy)


Published in SPIE Proceedings Vol. 4827:
Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications

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