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Proceedings Paper

Comparison of optical fibre Bragg grating strain sensors with shearography and resistance foil strain gauge measurements
Author(s): Edmon Chehura; Roger M. Groves; Weilai Li; Stephen E. Staines; Stephen W. James; Ralph P. Tatam
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Paper Abstract

Optical fibre Bragg grating (FBG) strain sensor measurements were compared with theoretical strain calculations and measurements from two competing techniques: shearography and resistance foil strain gauges (RFSG). Axial and hoop strains in an ABS pipe, loaded by changing the internal pressure were investigated. Six wavelength-multiplexed FBG sensors were used to measure the axial and the hoop strains. RFGSs located on the surface adjacent to the FBGs were used for comparison. A multi-component shearography instrument was also used to perform full-field surface strain measurements on the pipe. Measurements were made using two shear directions, yielding six displacement gradient components in total. The measured δu/δx and δv/δy components were compared with theoretical hoop and axial strains respectively. Good agreement was found between the three techniques and the theory.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.624218
Show Author Affiliations
Edmon Chehura, Cranfield Univ. (United Kingdom)
Roger M. Groves, Cranfield Univ. (United Kingdom)
Weilai Li, Wuhan Univ. of Technology (China)
Stephen E. Staines, Cranfield Univ. (United Kingdom)
Stephen W. James, Cranfield Univ. (United Kingdom)
Ralph P. Tatam, Cranfield Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors

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