Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 7, 2012
|
|
---|---|---|
Article Number | 12048 | |
Number of page(s) | 5 | |
DOI | https://doi.org/10.2971/jeos.2012.12048 | |
Published online | 18 November 2012 |
Regular papers
Fiber optic sensors for precursory acoustic signals detection in rockfall events
1
Research Institute for Geo-Hydrological Protection, National Research Council of Italy, 35127 Padova, Italy
2
Department of Information Engineering, University of Padova, 35131 Padova, Italy
3
Department of Physics and Astronomy and LaserLaB, VU Amsterdam, 1081 Amsterdam, The Netherlands
Received:
29
June
2012
Revised:
29
October
2012
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.
Key words: Fiber optic sensor / acoustic emission / rock monitoring / interferometry
© The Author(s) 2012. All rights reserved.
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