Interrogation of fibre Bragg gratings through a fibre optic rotary joint on a geotechnical centrifuge

Ricardo Correia; Stephen W. James; Alec Marshall; Charles Heron; Sergiy Korposh

doi:10.1117/12.2236979

30 May 2016 Interrogation of fibre Bragg gratings through a fibre optic rotary joint on a geotechnical centrifuge

Ricardo Correia, Stephen W. James, Alec Marshall, Charles Heron, Sergiy Korposh

Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 99162B (2016) https://doi.org/10.1117/12.2236979
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

Abstract

The monitoring of an array of fibre Bragg gratings (FBGs) strain sensors was performed through a single channel, single mode fibre optic rotary joint (FORJ) mounted on a geotechnical centrifuge. The array of three FBGs was attached to an aluminum plate that was anchored at the ends and placed on the model platform of the centrifuge. Acceleration forces of up to 50g were applied and the reflection signal of the monitored FBGs recorded dynamically using a 2.5kHz FBG interrogator placed outside the centrifuge. The use of a FORJ allowed the monitoring of the FBGs without submitting the FBG interrogator to the high g-forces experienced in the centrifuge.

Citation Download Citation

Ricardo Correia, Stephen W. James, Alec Marshall, Charles Heron, and Sergiy Korposh "Interrogation of fibre Bragg gratings through a fibre optic rotary joint on a geotechnical centrifuge", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99162B (30 May 2016); https://doi.org/10.1117/12.2236979

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