26 June 2017 Interferometric fibre-optic curvature sensing for structural, directional vibration measurements
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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.
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Thomas Kissinger, Thomas Kissinger, Edmon Chehura, Edmon Chehura, Stephen W. James, Stephen W. James, Ralph P. Tatam, 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); doi: 10.1117/12.2269985; https://doi.org/10.1117/12.2269985

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