Interferometric fibre-optic curvature sensing for structural, directional vibration measurements

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

doi:10.1117/12.2269985

26 June 2017 Interferometric fibre-optic curvature sensing for structural, directional vibration measurements

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

Proceedings Volume 10329, Optical Measurement Systems for Industrial Inspection X; 1032925 (2017) https://doi.org/10.1117/12.2269985
Event: SPIE Optical Metrology, 2017, Munich, Germany

Abstract

Dynamic fibre-optic curvature sensing using fibre segment interferometry is demonstrated using a cost-effective rangeresolved interferometry interrogation system. Differential strain measurements from four fibre strings, each containing four fibre segments of gauge length 20 cm, allow the inference of lateral vibrations as well as the direction of the vibration of a cantilever test object. Dynamic tip displacement resolutions in the micrometre range over a 21 kHz interferometric bandwidth demonstrate the suitability of this approach for highly sensitive fibre-optic directional vibration measurements, complementing existing laser vibrometry techniques by removing the need for side access to the structure under test.

Citation Download Citation

Thomas Kissinger, Edmon Chehura, Stephen W. James, and Ralph P. Tatam "Interferometric fibre-optic curvature sensing for structural, directional vibration measurements", Proc. SPIE 10329, Optical Measurement Systems for Industrial Inspection X, 1032925 (26 June 2017); https://doi.org/10.1117/12.2269985

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