Simultaneous measurement of strain and curvature using superstructure fibre Bragg gratings

Gwandu, B.A.L.; Shu, X.W.; Liu, Y.; Zhang, W.; Zhang, L. and Bennion, I. (2002). Simultaneous measurement of strain and curvature using superstructure fibre Bragg gratings. Sensors and Actuators A : physical, 96 (2-3), pp. 133-139.

Abstract

We report the first demonstration of the simultaneous measurement of strain and curvature, with temperature compensation, using a single superstructure fibre Bragg grating (SFBG). The SFBG exhibits the properties of both the fibre Bragg grating (FBG) and the long period fibre grating (LPG) such that its spectral response facilitates strain measurement from the wavelength shift of the FBG-like characteristic, and independent measurement of curvature from the LPG-like mode-splitting characteristic. The dependence of the LPG mode-splitting on the mode order has also been investigated and utilised for the measurement of very small curvatures.

Publication DOI: https://doi.org/10.1016/S0924-4247(01)00782-8
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
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Uncontrolled Keywords: sampled fibre Bragg grating,smart structures,strain and curvature sensing,Electrical and Electronic Engineering,Mechanical Engineering,Instrumentation
Published Date: 2002-02-28

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