Remote Simultaneous Measurement of Liquid Temperature and Refractive Index Using Fiber-Optic Spontaneous Raman Scattering

Wang, Dong; Cheng, Bizhao; Jin, Baoquan; Wang, Yu; Zhang, Mingjiang; Liu, Xin; Bai, Qing

doi:10.1109/jsen.2019.2930108

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…Furthermore, Henault et al conducted experimental researches on dam leakage detection and concrete structure strain monitoring based on the distributed optical fiber technology, simulating the strain between the optical fiber and the concrete structure 161 . Studying the location, direction and routing method of the sensing optical fibers in the dam are fundamental issues concerning dam leakage monitoring, and some researchers have elaborated on the application of optical fiber sensing instruments and their installation in actual projects 162 – 164 . Currently, with the improvement of various performance indicators of the optical fiber sensing technology, its applicability in the field of dam safety monitoring has become more extensive.…”

Section: Applicationsmentioning

confidence: 99%

Physics and applications of Raman distributed optical fiber sensing

Zhang

2022

Light Sci Appl

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Raman distributed optical fiber sensing has been demonstrated to be a mature and versatile scheme that presents great flexibility and effectivity for the distributed temperature measurement of a wide range of engineering applications over other established techniques. The past decades have witnessed its rapid development and extensive applicability ranging from scientific researches to industrial manufacturing. However, there are four theoretical or technical bottlenecks in traditional Raman distributed optical fiber sensing: (i) The difference in the Raman optical attenuation, a low signal-to-noise ratio (SNR) of the system and the fixed error of the Raman demodulation equation restrict the temperature measurement accuracy of the system. {ii) The sensing distance and spatial resolution cannot be reconciled. (iii) There is a contradiction between the SNR and measurement time of the system. (iv) Raman distributed optical fiber sensing cannot perform dual-parameter detection. Based on the above theoretical and technical bottlenecks, advances in performance enhancements and typical applications of Raman distributed optical fiber sensing are reviewed in this paper. Integration of this optical system technology with knowledge based, that is, demodulation technology etc. can further the performance and accuracy of these systems.

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Section: Applicationsmentioning

confidence: 99%

Physics and applications of Raman distributed optical fiber sensing

Zhang

2022

Light Sci Appl

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“…However, the downsize of these measurement techniques is the fact that they are relying upon static frequency scanning, which is not suitable to follow the dynamic nature of cable operation [117]. There is an array of solutions for this issue, among which are the use of multimode fibre used for simultaneous measurements [118], sweep-free and slope-assisted configurations [119], and optical unipolar pulse coding schemes [120].…”

Section: Cable Monitoringmentioning

confidence: 99%

Concepts and Methods to Assess the Dynamic Thermal Rating of Underground Power Cables

et al. 2021

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With the increase in the electrical load and the progressive introduction of power generation from intermittent renewable energy sources, the power line operating conditions are approaching the thermal limits. The definition of thermal limits variable in time has been addressed under the concept of dynamic thermal rating (DTR), with which it is possible to provide a more detailed assessment of the line rating and exploit the electrical system more flexibly. Most of the literature on DTR has addressed overhead lines exposed to different weather conditions. The interest in the dynamic thermal rating of power cables is increasing, considering the evolution of computational methods and advanced systems for cable monitoring. This paper contains an overview of the concepts and methods referring to dynamic cable rating (DCR). Starting from the analytical formulations developed many years ago for determining the power cable rating in steady-state conditions, also reported in International Standards, this paper considers the improvements of these formulations proposed during the years. These improvements are leading to include more specific details in the models used for DCR analysis and the computational methods used to assess the power cable’s thermal conditions buried in soil. This paper is focused on highlighting the path from the initial theories and models to the latest literature contributions. Attention is paid to thermal modelling with different levels of detail, applications of 2D and 3D solvers and simplified models, and their validation based on experimental measurements. A salient point of the overview is considering the DCR impact on reliability aspects, risk estimation, real-time calculations, forecasting, and planning with different time horizons.

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“…The investigation opens a new trend in multi-point gas or liquid sensing with high sensitivity and selectivity suitable for environmental monitoring and biomedical applications. Another study has also been made in the use of multimode fiber for simultaneous measurement of liquid temperature via the ratio of the Raman Stokes and anti-Stokes components and refractive index using the Fresnel reflection of the forward-scattered Raman Stokes signal from the fiber [45]. A mechanism for early warning for fire prediction in a long-range RDTS system has been proposed and demonstrated using first and second order moving average methods, resulting in the prediction of temperature trends in advance of 43 sec [46].…”

Section: Pulse Coding In Rdts and Addressing Cross-sensitivity Betweementioning

confidence: 99%

Application of Raman and Brillouin Scattering Phenomena in Distributed Optical Fiber Sensing

2019

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Remote Simultaneous Measurement of Liquid Temperature and Refractive Index Using Fiber-Optic Spontaneous Raman Scattering

Cited by 8 publications

References 22 publications

Physics and applications of Raman distributed optical fiber sensing

Physics and applications of Raman distributed optical fiber sensing

Concepts and Methods to Assess the Dynamic Thermal Rating of Underground Power Cables

Application of Raman and Brillouin Scattering Phenomena in Distributed Optical Fiber Sensing

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