Definition of FBG sensor photoelastic coeffecient by laser doppler vibrometery

Barbara Marchetti; R Montanini; C Rondini; P Maggiorana; Gianluca L. Rossi

doi:10.1117/12.468171

22 May 2002 Definition of FBG sensor photoelastic coeffecient by laser doppler vibrometery

Barbara Marchetti, R Montanini, C Rondini, P Maggiorana, Gianluca L. Rossi

Proceedings Volume 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (2002) https://doi.org/10.1117/12.468171
Event: Fifth International Conference on Vibration Measurements by Laser Techniques, 2002, Ancona, Italy

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.

Citation Download Citation

Barbara Marchetti, R Montanini, C Rondini, P Maggiorana, and Gianluca L. Rossi "Definition of FBG sensor photoelastic coeffecient by laser doppler vibrometery", Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); https://doi.org/10.1117/12.468171

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