arcmathDistributed Acoustic Sensing (DAS) will listen for #whales at California floating offshore wind farms.
#FiberOptics #DistributedAcousticSensing #DAS #WindPower #FloatingOffshoreWind #FOWT
GÉANTWhat if our networks could do more than just carry data?
In December, the Fibre Sensing Task of the GÉANT (GN5-2) Project, together with SURF @SURF turned 57 km of live optical fibre into a sensor.
The result? Detecting everything from trams to a plane landing at Amsterdam Airport Schiphol.
🎥 Watch Chris Atherton walk us through the experiment.
#fibresensing #fibre #network #research #cablesensin #DistributedAcousticSensing
WeAreSeismicaFiber optics, widely employed in telecommunications, can serve as remarkable seismometers.
Capdeville & Sladen delve into the complex sensitivity of Distributed Acoustic Sensing (DAS) to nearby ground heterogeneities to correct or take advantage of them:
https://doi.org/10.26443/seismica.v3i1.1007
#Seismology #EarthquakeScience #peerreviewed #DiamondOpenAccess #Earthquake #OpenAccess #OpenScience #DAS #DistributedAcousticSensing
DAS sensitivity to heterogeneity scales much smaller than the minimum wavelength
Distributed Acoustic Sensing (DAS) is a photonic technology allowing toconvert fiber-optics into long (tens of kilometers) and dense (every few meters) arrays of seismo-acoustic sensors which are basically measuring the strain of the cable all along the cable. The potential of such a distributed measurement is very important and has triggered strong attention in the seismology community for a wide range of applications. In this work, we focus on the interaction of such measurements with heterogeneities of scale much smaller than the wavefield minimum wavelength. With a simple 2-D numerical modeling, we first show that the effect of such small-scale heterogeneities, when located in the vicinity of the instruments, is very different depending on whether we measure particle velocity or strain rate: in the case of velocity, this effect is small but becomes very strong in the case of the strain rate. We then provide a physical explanation of these observations based on the homogenization method showing that indeed, the strain sensitivity to nearby heterogeneities is strong, which is not the case for more traditional velocity measurements. This effect appears as a coupling of the strain components to the DAS measurement. Such effects can be seen as a curse or an advantage depending on the applications.
Itamar MedeirosIn an increasingly global world, imagine if you could see where and when new #ideas, #businesstrends, and even #technologies first emerged in #society and then explore how they spread over #time and #space. Using #AI and unconventional #datasources there are several new ways to map the global birth, adoption and diffusion of #emergingtechnologies
#technologytrends #TechnologyNews #technologyhistory #forbes #Distributedacousticsensing #Gridenergystorage #Medicalrobots
