Results 31 to 40 of about 77,948 (279)

Sediment Corrections for Distributed Acoustic Sensing

Journal of Geophysical Research: Solid Earth
On continental margins, sediments cause significant and spatially variable delays in seismic phase arrival times. The strong impedance contrast of the sediment-bedrock interface causes P-wave splitting that is clearly seen on Distributed Acoustic Sensing recordings of earthquakes, resulting in additional phase arrivals that must be picked separately ...
Trabattoni, Alister, Vernet, Clara, van den Ende, Martijn P.A., Baillet, Marie, Potin, Bertrand, Rivet, Diane   +5 more
openaire   +2 more sources

Data Transmission with Reduced Delay for Distributed Acoustic Sensors

, 2015
This paper proposes a channel access control scheme fit to dense acoustic sensor nodes in a sensor network. In the considered scenario, multiple acoustic sensor nodes within communication range of a cluster head are grouped into clusters. Acoustic sensor
Har, Dongsoo, Lee, Sang-Keum, Ryu, Hyun-Gyu   +2 more
core   +2 more sources

Wireless actuation of bulk acoustic modes in micromechanical resonators [PDF]

, 2016
We report wireless actuation of a Lamb wave micromechanical resonator from a distance of over 1 m with an efficiency of over 15%. Wireless actuation of conventional micromechanical resonators can have broad impact in a number of applications from ...
Brown, Benjamin, Erramilli, Shyamsunder, Mateen, Farrukh, Mohanty, Pritiraj   +3 more
core   +1 more source

Distributed opto-mechanical analysis of liquids outside standard fibers coated with polyimide

, 2019
The analysis of surrounding media has been a long-standing challenge of optical fiber sensors. Measurements are difficult due to the confinement of light to the inner core of standard fibers.
Bashan, Gil, Diamandi, Hilel Hagai, London, Yosef, Zadok, Avi   +3 more
core   +1 more source

Acoustical Ranging Techniques in Embedded Wireless Sensor Networked Devices [PDF]

, 2013
Location sensing provides endless opportunities for a wide range of applications in GPS-obstructed environments; where, typically, there is a need for higher degree of accuracy.
Jha, Sanjay, Kottege, Navinda, Kusy, Branislav, Misra, Prasant, Ostry, Diethelm   +4 more
core   +2 more sources

Fiber-optic interferometric sensor for monitoring automobile and rail traffic [PDF]

, 2018
This article describes a fiber-optic interferometric sensor and measuring scheme including input-output components for traffic density monitoring. The proposed measuring system is based on the interference in optical fibers. The sensor, based on the Mach-
Cvejn, Daniel, Dvorský, Marek, Fajkus, Marcel, Kahánková, Radana, Martinek, Radek, Nedoma, Jan, Vaňuš, Jan, Vašinek, Vladimír   +7 more
core   +1 more source

Real-Time Train Tracking from Distributed Acoustic Sensing Data

Applied Sciences, 2020
In the context of railway safety, it is crucial to know the positions of all trains moving along the infrastructure. In this contribution, we present an algorithm that extracts the positions of moving trains for a given point in time from Distributed ...
Christoph Wiesmeyr, Martin Litzenberger, Markus Waser, Adam Papp, Heinrich Garn, Günther Neunteufel, Herbert Döller   +6 more
doaj   +1 more source

An acoustic multi-touch sensing method using amplitude disturbed ultrasonic wave diffraction patterns [PDF]

, 2010
This paper proposes an acoustic multi-touch tactile sensing method. The proposed method is based on an amplitude disturbed ultrasonic wave diffraction pattern.
HAFEZ, Moustapha, LIU, Yuan, MECHBAL, Nazih, NIKOLOVSKI, Jean-Pierre, VERGÉ, Michel   +4 more
core   +6 more sources

Prediction of Surface Topography Parameters in Direct Laser Interference Patterning of Stainless Steel Using Infrared Monitoring and Convolutional Neural Networks

Advanced Engineering Materials, EarlyView.
This study presents an infrared monitoring approach for direct laser interference patterning (DLIP) combined with a convolutional neural network (CNN). Thermal emission data captured during structuring are used to predict surface topography parameters.
Lukas Olawsky, Marcelo Sallese, Leander Kläber, Clemens Kuhn, Keming Du, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

Applications of Acoustic Wave Devices for Sensing in Liquid Environments [PDF]

, 2006
Acoustic wave devices such as thickness shear mode (TSM) resonators and shear horizontal surface acoustic wave (SH-SAW) devices can be utilized for characterizing physical properties of liquids and for chemical sensor applications.
Hossenlopp, Jeanne
core   +1 more source