Damage detection in a cantilever beam under dynamic conditions using a distributed, fast, and high spatial resolution Brillouin interrogator

A. Motil; R. Davidi; A. Bergman; Y. Botsev; M. Hahami; M. Tur

doi:10.1117/12.2236790

30 May 2016 Damage detection in a cantilever beam under dynamic conditions using a distributed, fast, and high spatial resolution Brillouin interrogator

A. Motil, R. Davidi, A. Bergman, Y. Botsev, M. Hahami, M. Tur

Author Affiliations +

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.

Citation Download Citation

A. Motil, R. Davidi, A. Bergman, Y. Botsev, M. Hahami, and 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); https://doi.org/10.1117/12.2236790

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