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SpringerOpen, Journal of the European Optical Society-Rapid Publications, (7)

DOI: 10.2971/jeos.2012.12048

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Fiber optic sensors for precursory acoustic signals detection in rockfall events

Journal article published in 2012 by L. Schenato ORCID, L. Palmieri, G. Gruca, D. Iannuzzi, G. Marcato, A. Pasuto ORCID, A. Galtarossa
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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.