Results 11 to 20 of about 2,928,106 (302)
Distributed acoustic sensing with Michelson interferometer demodulation [PDF]
Photonic Sensors, 2016 The distributed acoustic sensing (DAS) has been extensively studied and widely used. A distributed acoustic sensing system based on the unbalanced Michelson interferometer with phase generated carrier (PGC) demodulation was designed and tested.
Xiaohui Liu +6 more
doaj +2 more sources
On Sampling and Coding for Distributed Acoustic Sensing [PDF]
IEEE Transactions on Information Theory, 2012 The issue of how to efficiently represent the data collected by a network of microphones recording spatio-temporal acoustic wave fields is addressed. Each sensor node in the network samples the sound field, quantizes the samples and transmits the encoded samples to some central unit, which computes an estimate of the original sound field based on the ...
Robert L. Konsbruck +2 more
openaire +2 more sources
Research progress of distributed optical fiber sensing technology in hydraulic fracturing [PDF]
Youqicang pingjia yu kaifaDistributed optical fiber sensing technology, a cutting-edge method for monitoring hydraulic fracturing, has been successfully applied in various oil fields to enable real-time monitoring, achieving notable results.
LU Cong, LI Qiuyue, GUO Jianchun
doaj +2 more sources
Observing avalanche dynamics with Distributed Acoustic Sensing
, 2021 <p><span>Avalanche research requires comprehensive measurements of sudden and rapid snow mass movement that is hard to predict. Automatic cameras, radar and infrasound sensors provide valuable observations of avalanche structure and dynamic parameters, such as velocity.
Andreas Fichtner +9 more
openaire +4 more sources
Energy-efficient sensing in wireless sensor networks using compressed sensing [PDF]
, 2014 Sensing of the application environment is the main purpose of a wireless sensor network. Most existing energy management strategies and compression techniques assume that the sensing operation consumes significantly less energy than radio transmission ...
Razzaque, Mohammad Abdur +5 more
core +1 more source
Airborne Sound Sensing System Based on DAS and Ultra-Simple Transducer Structure
Photonics, 2022 Fiber-distributed optical fiber acoustic sensor (DAS) is generally used in distributed long-distance acoustic/vibration measurement. Recently, DAS is also used in weak airborne sound detection.
Jianfang Tang +4 more
doaj +1 more source
Ultrasonic sensing using Yb3+/Er3+-codoped distributed feedback fibre grating lasers. [PDF]
, 2005 Yb3+/Er3+-codoped distributed feedback (YbEr-DFB) fibre grating lasers have been investigated for the detection of ultrasonic Lamb waves generated in an aluminum plate. Two sensor configurations have been investigated. A path length imbalanced readout
Ye, Chen-Chun, Tatam, Ralph P.
core +1 more source
Distributed acoustic sensing for seismic activity monitoring
APL Photonics, 2020 Continuous, real-time monitoring of surface seismic activity around the globe is of great interest for acquiring new insight into global tomography analyses and for recognition of seismic patterns leading to potentially hazardous situations.
María R. Fernández-Ruiz +6 more
doaj +1 more source
Hybrid distributed acoustic-temperature sensing using a few-mode fiber
, 2020 Optical fiber distributed acoustic sensor (DAS) and distributed temperature sensor (DTS) are considerably desirable for many important applications including oil and gas industry.
Frode Hveding +11 more
core +1 more source
A Comprehensive Study of Optical Fiber Acoustic Sensing
IEEE Access, 2019 The optical fiber acoustic sensing system is suitable for long-distance monitoring of the acoustic signals generated by the external disturbances. According to the continuity of sensing units, quasi-distributed and distributed optical fiber acoustic ...
Yu Wang +6 more
doaj +1 more source