Multiplexing curvature sensors using fibre segment interferometry for lateral vibration measurements

Thomas Kissinger; Edmon Chehura; Stephen W. James; Ralph P. Tatam

doi:10.1117/12.2264781

23 April 2017 Multiplexing curvature sensors using fibre segment interferometry for lateral vibration measurements

Thomas Kissinger, Edmon Chehura, Stephen W. James, Ralph P. Tatam

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032317 (2017) https://doi.org/10.1117/12.2264781
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

Dynamic fibre-optic curvature sensing is demonstrated by interrogating chains of fibre segments, separated by broadband Bragg grating reflectors, using range-resolved interferometry (RRI). Four fibre strings, containing four fibre segments each of gauge length 20 cm, are attached to the opposing sides of a support structure and the resulting differential strain measurements allow inference of lateral displacements of a cantilever test object. Dynamic tip displacement resolutions in the micrometre range at an interferometric bandwidth of 21 kHz demonstrate the suitability of this approach for highly sensitive and cost-effective fibre-optic directional vibration measurements of smart structures.

Citation Download Citation

Thomas Kissinger, Edmon Chehura, Stephen W. James, and Ralph P. Tatam "Multiplexing curvature sensors using fibre segment interferometry for lateral vibration measurements", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032317 (23 April 2017); https://doi.org/10.1117/12.2264781

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