Fiber opticsensors for precursory acoustic signals detection in rockfall events

L. Schenato, L. Palmieri, G.L. Gruca, D. Iannuzzi, G. Marcato, A. Pasuto, A. Galtarossa

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Abstract

Two fiber optic sensors (FOSs) for detection of precursory acoustic emissions in rockfall events are addressed and experimentally characterized. Both sensors are based on interferometric schemes, with the first one consisting of a fiber coil used as sensing element and the second one exploiting a micro-machined cantilever carved on the top of a ferrule. Preliminary comparisons with standard piezo-electric transducers shows the viability of such FOSs for acoustic emission monitoring in rock masses.
Original languageEnglish
JournalJournal of the European Optical Society. Rapid Publications
Volume7
DOIs
Publication statusPublished - 2012

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