Fiber-optic distributed acoustic sensors (DAS) and applications in railway perimeter security

2018 ◽  
Author(s):  
Xinyu Fan ◽  
Zuyuan He ◽  
Qingwen Liu ◽  
Dian Chen ◽  
Shuai Wang ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Acoustic Sensors

Phase-modulated fiber optic acoustic sensors

1989 ◽  
Vol 28 (2) ◽  
pp. 1-6 ◽  
Author(s):  
N. Lagakos ◽  
J. Bucaro
Keyword(s):  
Fiber Optic ◽  
Acoustic Sensors

Fiber optic acoustic sensors for crack growth diagnostics

2008 ◽  
Author(s):  
Dae-Cheol Seo ◽  
Il-Bum Kwon ◽  
Chi-Yeop Kim ◽  
Dong-Jin Yoon
Keyword(s):  
Crack Growth ◽  
Fiber Optic ◽  
Acoustic Sensors

Use of 2D In2Se3 Single Crystal as a Diaphragm Material for Fabry-Perot Fiber Optic Acoustic Sensors

2019 ◽  
Vol 14 (4) ◽  
pp. 464-469 ◽  
Author(s):  
Sekip-Esat Hayber ◽  
Timucin-Emre Tabaru ◽  
Umut Aydemir ◽  
Omer-Galip Saracoglu
Keyword(s):  
Single Crystal ◽  
Fiber Optic ◽  
Acoustic Sensors ◽  
Fabry Perot

Thin-silica-diaphragm-based fiber optic acoustic sensors

1999 ◽  
Author(s):  
Hai Xiao ◽  
Paul G. Duncan ◽  
Jiangdong Deng ◽  
Wei Huo ◽  
Zhiguang Wang ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Acoustic Sensors

Repeat well logging using earthquake wave amplitudes measured by distributed acoustic sensors

2020 ◽  
Vol 39 (7) ◽  
pp. 513-517
Author(s):  
Roman Pevzner ◽  
Boris Gurevich ◽  
Anastasia Pirogova ◽  
Konstantin Tertyshnikov ◽  
Stanislav Glubokovskikh
Keyword(s):  
Seismic Waves ◽  
Fiber Optic ◽  
Synthetic Data ◽  
Seismic Source ◽  
Small Scale ◽  
Acoustic Sensors ◽  
Linear Strain ◽  
Subsurface Characterization ◽  
Distributed Acoustic Sensing ◽  
Subsurface Monitoring

Well-based technologies for seismic subsurface monitoring increasingly utilize fiber-optic cables installed in boreholes as distributed acoustic sensing (DAS) systems. A DAS cable allows measuring linear strain of the fiber and can serve as an array of densely spaced seismic receivers. The strain amplitudes recorded by the DAS cable depend on the near-well formation properties (the softer the medium, the larger the strain). Thus, these properties can be estimated by measuring relative variations of the amplitudes of seismic waves propagating along the well. An advantage of such an approach to subsurface characterization and monitoring is that no active seismic source is required. Passive sources such as earthquakes can be utilized. A synthetic data example demonstrates viability of the approach for monitoring of small-scale CO2 injection into an aquifer. Two field DAS data examples based on signal recordings from several distant earthquakes show that the relevant properties of the near-well formation can be estimated with an accuracy of approximately 5%.

Ultra-High Sensitive Photoacoustic Spectrometer for Trace Gas Detection Based on Fiber-Optic Acoustic Sensors

2018 ◽  
Vol 38 (3) ◽  
pp. 0328015
Author(s):  
陈珂 Chen Ke ◽  
袁帅 Yuan Shuai ◽  
宫振峰 Gong Zhenfeng ◽  
于清旭 Yu Qingxu
Keyword(s):  
Fiber Optic ◽  
Gas Detection ◽  
Trace Gas ◽  
Acoustic Sensors ◽  
Trace Gas Detection ◽  
Photoacoustic Spectrometer

A Review on Advances in Fiber-optic Distributed Acoustic Sensors (DAS)

2018 ◽  
Author(s):  
Zuyuan He ◽  
Qingwen Liu ◽  
Xinyu Fan ◽  
Dian Chen ◽  
Shuai Wang ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Acoustic Sensors
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