Results 11 to 20 of about 80,178 (324)

Distributed Acoustic Sensing (DAS) for Longwall Coal Mines

International Journal of Rock Mechanics and Mining Sciences
Seismic monitoring of underground longwall mines can provide valuable information for managing coal burst risks and understanding the ground response to extraction. However, the underground longwall mine environment poses major challenges for traditional in-mine microseismic sensors including the restricted use of electronics due to potentially ...
Derrick Chambers, Alexander Ankamah, Ahmad Tourei, Eileen Martin, Tim Dean, Jeffrey Shragge, J. A. Hole, Rafał Czarny, Gareth Goldswain, J. Du Toit, Shawn Boltz, James McGuiness   +11 more
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DASPack: Controlled Data Compression for Distributed Acoustic Sensing [PDF]

Geophysical Journal International
SUMMARY We present DASPack, a high-performance, open-source compression tool specifically designed for distributed acoustic sensing (DAS) data. As DAS becomes a key technology for real-time, high-density and long-range monitoring in fields such as geophysics, infrastructure surveillance and environmental sensing, the volume of ...
Aleix Seguí, Arantza Ugalde, Andreas Fichtner, Sergi Ventosa, Josep Ramon Morros   +4 more
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Distributed Acoustic Sensing Based on Coherent Microwave Photonics Interferometry

Sensors, 2021
A microwave photonics method has been developed for measuring distributed acoustic signals. This method uses microwave-modulated low coherence light as a probe to interrogate distributed in-fiber interferometers, which are used to measure acoustic ...
Liwei Hua, Xuran Zhu, Baokai Cheng, Yang Song, Qi Zhang, Yongji Wu, Lawrence C. Murdoch, Erin R. Dauson, Carly M. Donahue, Hai Xiao   +9 more
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Amplitude Calibration for Distributed Acoustic Sensing

A. C. Stanciu, Robert Porritt, Robert Abbott, Brian Young, Miles Bodmer, Seth Root, Miles Bodmer, Seth Root   +7 more
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Review of a Specialty Fiber for Distributed Acoustic Sensing Technology

Photonics, 2022
Specialty fibers have introduced new levels of flexibility and variability in distributed fiber sensing applications. In particular, distributed acoustic sensing (DAS) systems utilized] the unique functions of specialty fibers to achieve performance ...
Yixiang Sun, Hao Li, Cunzheng Fan, Baoqiang Yan, Junfeng Chen, Zhijun Yan, Qizhen Sun   +6 more
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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, Minghao Hu, Gan Jiang, Xuanyu Zheng, Fei Peng   +4 more
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Distributed acoustic sensing in geophysics — Introduction

GEOPHYSICS, 2023
In recent years, fiber-optic distributed acoustic sensing (DAS) has experienced a rapid surge in popularity within the geophysics community. When compared to traditional point sensors, DAS offers several significant advantages. First, DAS provides spatially and temporally continuous measurements at high resolution along distances of more than 100 km ...
Jin, G., Kazei, V., Lellouch, A., Li, W., Titov, A., Rodriguez Tribaldos, V.   +5 more
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Field testing of modular borehole monitoring with simultaneous distributed acoustic sensing and geophone vertical seismic profiles at Citronelle, Alabama [PDF]

, 2016
A modular borehole monitoring concept has been implemented to provide a suite of well-based monitoring tools that can be deployed cost effectively in a flexible and robust package.
Aki, CO2 Capture Project, Daley, Daley, Embree, Esposito, Farhadiroushan, Freifeld, Haldorsen, Hartog, IPCC, Mateeva, O'Neil, Parker, SECARB, Widrow   +15 more
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Distributed acoustic sensing with Michelson interferometer demodulation

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, Chen Wang, Ying Shang, Chang Wang, Wenan Zhao, Gangding Peng, Hongzhong Wang   +6 more
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Research progress of distributed optical fiber sensing technology in hydraulic fracturing [PDF]

Youqicang pingjia yu kaifa
Distributed 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
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