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 +9 more
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The cornerstone of fiber-optic distributed vibration/acoustic sensing: Ф-OTDR
Opto-Electronic Advances, 2023 Fiber-optic distributed vibration/acoustic sensing (DVS/DAS) technology achieves breakthrough performance and explores broad cornerstone industrial applications.
Yunjiang Rao
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Distributed Acoustic Sensing for Monitoring Linear Infrastructures: Current Status and Trends
Sensors, 2022 Linear infrastructures, such as railways, tunnels, and pipelines, play essential roles in economic and social development worldwide. However, under the influence of geohazards, earthquakes, and human activities, linear infrastructures face the potential ...
Hong-Hu Zhu +4 more
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Distributed Acoustic Sensing (DAS) as a Distributed Hydraulic Sensor in Fractured Bedrock
Water Resources Research, 2020 Abstract Distributed acoustic sensing (DAS) was originally intended to measure oscillatory strain at frequencies of 1 Hz or more on a fiber optic cable. Recently, measurements at much lower frequencies have opened the possibility of using DAS as a dynamic strain sensor in boreholes.
M. W. Becker +2 more
openaire +2 more sources
Distributed acoustic sensing recordings of low-frequency whale calls and ship noise offshore Central Oregon [PDF]
JASA Express Letters, 2023 Distributed acoustic sensing (DAS) is a technique that measures strain changes along an optical fiber to distances of ∼100 km with a spatial sensitivity of tens of meters.
William S. D. Wilcock +2 more
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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 +7 more
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Smartening the Environment using Wireless Sensor Networks in a Developing Country [PDF]
, 2006 The miniaturization process of various sensing devices has become a reality by enormous research and advancements accomplished in Micro Electro-Mechanical Systems (MEMS) and Very Large Scale Integration (VLSI) lithography.
Hong, Choong Seon +2 more
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Application of Distributed Acoustic Sensing in Vessel Detection [PDF]
EPJ Web of ConferencesDistributed Acoustic Sensing (DAS) leverages the sensitivity of optical fibers to detect environmental vibrations. This study demonstrates the capability of DAS to identify and characterize the acoustic signatures of passing vessels, highlighting its ...
van Golde Ilmer +5 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 +6 more
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A survey of localization in wireless sensor network [PDF]
, 2012 Localization is one of the key techniques in wireless sensor network. The location estimation methods can be classified into target/source localization and node self-localization. In target localization, we mainly introduce the energy-based method.
Ampeliotis D. +32 more
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