30 May 2016 Damage detection in a cantilever beam under dynamic conditions using a distributed, fast, and high spatial resolution Brillouin interrogator
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Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 99162X (2016) https://doi.org/10.1117/12.2236790
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland
Abstract
The ability of Brillouin-based fiber-optic sensing to detect damage in a moving cantilever beam is demonstrated. A fully computerized, distributed and high spatial resolution (10cm) Fast-BOTDA interrogator (50 full-beam Brillouin-gain-spectra per second) successfully directly detected an abnormally stiffened (i.e., ‘damaged’) 20cm long segment in a 6m Aluminum beam, while the beam was in motion. Damage detection was based on monitoring deviations of the measured strain distribution along the beam from that expected in the undamaged case.
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A. Motil, R. Davidi, A. Bergman, Y. Botsev, M. Hahami, M. Tur, "Damage detection in a cantilever beam under dynamic conditions using a distributed, fast, and high spatial resolution Brillouin interrogator", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162X (30 May 2016); doi: 10.1117/12.2236790; https://doi.org/10.1117/12.2236790
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