Fiber optic sensors for precursory acoustic signals detection in rockfall events

Fiber optic sensors for precursory acoustic signals detection in rockfall events

Blog Article

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 Bosal Set 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 Picture Frames such FOSs for acoustic emission monitoring in rock masses.