Enhanced Performance of a Temperature-Compensated Submeter Spatial Resolution Distributed Strain Sensor

Belal, Mohammad; Newson, T.P.

doi:10.1109/lpt.2010.2082515

Cited by 11 publications

(4 citation statements)

References 9 publications

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“…[21]. Like most of the approaches [2], [4], [6], [10], [11] used in calculating temperature/strain resolution, we obtain the temperature resolution from the ratio of the measurement error and the temperature sensitivity. The temperature sensitivity is the slope of the curve in Fig.…”

Section: Resultsmentioning

confidence: 99%

Distributed Temperature Sensing Using Stimulated-Brillouin-Scattering-Based Slow Light

et al. 2013

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Distributed temperature sensing has been achieved by spatially resolved measurement of the probe time delay resulted from stimulated-Brillouin-scattering slow light. The temperature of a particular fiber section can be monitored by setting an appropriate relative delay between the pump and probe pulses. By controlling the relative delay, we have achieved distributed profiling of the temperature along the whole sensing fiber. This scheme provides an alternative way for distributed temperature sensing with the potential of real-time temperature monitoring. A relatively high-temperature resolution of 0.7 C is obtained.

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Section: Resultsmentioning

confidence: 99%

Distributed Temperature Sensing Using Stimulated-Brillouin-Scattering-Based Slow Light

et al. 2013

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“…Encapsulation of the silica fibre‐optic core and its cladding in polymer coatings not only renders the fibre robust and ready for use in harsh environments but also makes it easy to handle. Fibre‐optic sensors are a promising technology to increase the inspection efficiency and accuracy for seafloor infrastructure prone to impacts by geohazards, due to their durability, stability, small size, and distributed probing capabilities (Alahbabi, Cho and Newson ; Belal and Newson ; Masoudi, Belal and Newson ). Future monitoring could include identification of warmer subsurface fluid expulsion, cumulative strain applied by recurrent sediment flows, or displacement by steady ground movement.…”

Section: Emerging Geophysical Tools For Monitoring Active Marine Geohmentioning

confidence: 99%

Direct monitoring of active geohazards: emerging geophysical tools for deep‐water assessments

Clare

Vardy

Cartigny

et al. 2017

Near Surface Geophysics

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Seafloor networks of cables, pipelines, and other infrastructure underpin our daily lives, providing communication links, information, and energy supplies. Despite their global importance, these networks are vulnerable to damage by a number of natural seafloor hazards, including landslides, turbidity currents, fluid flow, and scour. Conventional geophysical techniques, such as high‐resolution reflection seismic and side‐scan sonar, are commonly employed in geohazard assessments. These conventional tools provide essential information for route planning and design; however, such surveys provide only indirect evidence of past processes and do not observe or measure the geohazard itself. As such, many numerical‐based impact models lack field‐scale calibration, and much uncertainty exists about the triggers, nature, and frequency of deep‐water geohazards. Recent advances in technology now enable a step change in their understanding through direct monitoring. We outline some emerging monitoring tools and how they can quantify key parameters for deep‐water geohazard assessment. Repeat seafloor surveys in dynamic areas show that solely relying on evidence from past deposits can lead to an under‐representation of the geohazard events. Acoustic Doppler current profiling provides new insights into the structure of turbidity currents, whereas instrumented mobile sensors record the nature of movement at the base of those flows for the first time. Existing and bespoke cabled networks enable high bandwidth, low power, and distributed measurements of parameters such as strain across large areas of seafloor. These techniques provide valuable new measurements that will improve geohazard assessments and should be deployed in a complementary manner alongside conventional geophysical tools.

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“…Encapsulation of the silica fibre-optic core and its cladding in polymer coatings not only renders the fibre robust and ready for use in harsh environments but also makes it easy to handle. Fibre-optic sensors are a promising technology to increase the inspection efficiency and accuracy for seafloor infrastructure prone to impacts by geohazards, due to their durability, stability, small size, and distributed probing capabilities (Alahbabi, Cho and Newson 2006;Belal and Newson 2010;Masoudi, Belal and Newson 2013). Future monitoring could include identification of warmer subsurface fluid expulsion, cumulative strain applied by recurrent sediment flows, or displacement by steady ground movement.…”

Section: What Do Mobile Sensors Tell Us About Geohazards?mentioning

confidence: 99%

Direct monitoring of active geohazards: emerging geophysical tools for deep-water assessments

Clare¹,

Talling²,

Cartigny³

et al. 2017

Preprint

Self Cite

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Seafloor networks of cables, pipelines, and other infrastructure underpin our daily lives, providing communication links, information, and energy supplies. Despite their global importance, these networks are vulnerable to damage by a number of natural seafloor hazards, including landslides, turbidity currents, fluid flow, and scour. Conventional geophysical techniques, such as high-resolution reflection seismic and side-scan sonar, are commonly employed in geohazard assessments. These conventional tools provide essential information for route planning and design; however, such surveys provide only indirect evidence of past processes and do not observe or measure the geohazard itself. As such, many numerical-based impact models lack field-scale calibration, and much uncertainty exists about the triggers, nature, and frequency of deep-water geohazards. Recent advances in technology now enable a step change in their understanding through direct monitoring. We outline some emerging monitoring tools and how they can quantify key parameters for deepwater geohazard assessment. Repeat seafloor surveys in dynamic areas show that solely relying on evidence from past deposits can lead to an under-representation of the geohazard events. Acoustic Doppler current profiling provides new insights into the structure of turbidity currents, whereas instrumented mobile sensors record the nature of movement at the base of those flows for the first time. Existing and bespoke cabled networks enable high bandwidth, low power, and distributed measurements of parameters such as strain across large areas of seafloor. These techniques provide valuable new measurements that will improve geohazard assessments and should be deployed in a complementary manner alongside conventional geophysical tools.

show abstract

Enhanced Performance of a Temperature-Compensated Submeter Spatial Resolution Distributed Strain Sensor

Cited by 11 publications

References 9 publications

Distributed Temperature Sensing Using Stimulated-Brillouin-Scattering-Based Slow Light

Distributed Temperature Sensing Using Stimulated-Brillouin-Scattering-Based Slow Light

Direct monitoring of active geohazards: emerging geophysical tools for deep‐water assessments

Direct monitoring of active geohazards: emerging geophysical tools for deep-water assessments

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