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Proceedings Paper

Fiber Bragg grating strain gauge rosette with temperature compensation
Author(s): Frank M. Haran; Jason K. Rew; Peter D. Foote
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Paper Abstract

We will describe the construction of a fiber optic strain gauge rosette (FOSGR) using four in-line fiber Bragg gratings (FBGs). These FBGs are formed into a triangular- shaped loop structure. The first three FBGs are orientated at 0 degrees, 60 degrees, and 120 degrees. The final grating, which is at the end of the loop, is isolated from strain and acts as a temperature sensor. Using this independent temperature sensor, the temperature cross sensitivity of the strain sensing gratings can be factored out.Moreover, the inclusion of temperature sensing allows this optical strain gauge to be used on any structural material with arbitrary thermal properties. This FOSGR has been attached techniques. This paper describes experimental results obtained from a FOSGR that has been mounted on an aluminium test piece, which has been subjected to both compressive and tensile loads. Also shown are the temperature characteristics of a FOSGR.

Paper Details

Date Published: 21 July 1998
PDF: 11 pages
Proc. SPIE 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (21 July 1998); doi: 10.1117/12.316977
Show Author Affiliations
Frank M. Haran, British Aerospace (Canada)
Jason K. Rew, British Aerospace (United Kingdom)
Peter D. Foote, British Aerospace (United Kingdom)


Published in SPIE Proceedings Vol. 3330:
Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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