Analysis of fiber optic sensor application to precursory acoustic signals detection in rockfall events

L. Schenato; L. Palmieri; L. Vianello; G. Marcato; G. Gruca; T. van de Watering; D. Iannuzzi; A. Pasuto; A. Galtarossa

doi:10.1117/12.975142

7 November 2012 Analysis of fiber optic sensor application to precursory acoustic signals detection in rockfall events

L. Schenato, L. Palmieri, L. Vianello, G. Marcato, G. Gruca, T. van de Watering, D. Iannuzzi, A. Pasuto, A. Galtarossa

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 8421BG (2012) https://doi.org/10.1117/12.975142
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

Two fiber optic sensors (FOSs) for detection of precursory acoustic emissions in rockfall events are proposed and experimentally characterized. While both sensors are interferometric, the first one use a fiber coil as sensing element, whereas the second sensor exploits a micro-machined cantilever carved on the top of a ferrule. Preliminary experimental comparison with standard piezo-electric transducers shows the viability of such FOSs for acoustic emission monitoring in rock masses.

Citation Download Citation

L. Schenato, L. Palmieri, L. Vianello, G. Marcato, G. Gruca, T. van de Watering, D. Iannuzzi, A. Pasuto, and A. Galtarossa "Analysis of fiber optic sensor application to precursory acoustic signals detection in rockfall events", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421BG (7 November 2012); https://doi.org/10.1117/12.975142

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