scholarly journals Distributed Temperature Sensing for Oceanographic Applications

2020 ◽  
Vol 37 (11) ◽  
pp. 1987-1997 ◽  
Author(s):  
Gregory Sinnett ◽  
Kristen A. Davis ◽  
Andrew J. Lucas ◽  
Sarah N. Giddings ◽  
Emma Reid ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Data Processing ◽  
Laser Light ◽  
Temperature Sensing ◽  
Temperature Error ◽  
Distributed Temperature Sensing ◽  
Temperature Resolution ◽  
Ocean Conditions ◽  
Raman Scatter

AbstractDistributed temperature sensing (DTS) uses Raman scatter from laser light pulsed through an optical fiber to observe temperature along a cable. Temperature resolution across broad scales (seconds to many months, and centimeters to kilometers) make DTS an attractive oceanographic tool. Although DTS is an established technology, oceanographic DTS observations are rare since significant deployment, calibration, and operational challenges exist in dynamic oceanographic environments. Here, results from an experiment designed to address likely oceanographic DTS configuration, calibration, and data processing challenges provide guidance for oceanographic DTS applications. Temperature error due to suboptimal calibration under difficult deployment conditions is quantified for several common scenarios. Alternative calibration, analysis, and deployment techniques that help mitigate this error and facilitate successful DTS application in dynamic ocean conditions are discussed.

scholarly journals Assessment of a vertical high-resolution distributed-temperature-sensing system in a shallow thermohaline environment

2011 ◽  
Vol 15 (3) ◽  
pp. 1081-1093 ◽  
Author(s):  
F. Suárez ◽  
J. E. Aravena ◽  
M. B. Hausner ◽  
A. E. Childress ◽  
S. W. Tyler
Keyword(s):  
High Resolution ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Temperature Resolution ◽  
Spatial And Temporal Scales ◽  
Solar Pond ◽  
Salt Gradient ◽  
Time Averages ◽  
Corrosive Environments ◽  
And Storage

Abstract. In shallow thermohaline-driven lakes it is important to measure temperature on fine spatial and temporal scales to detect stratification or different hydrodynamic regimes. Raman spectra distributed temperature sensing (DTS) is an approach available to provide high spatial and temporal temperature resolution. A vertical high-resolution DTS system was constructed to overcome the problems of typical methods used in the past, i.e., without disturbing the water column, and with resistance to corrosive environments. This paper describes a method to quantitatively assess accuracy, precision and other limitations of DTS systems to fully utilize the capacity of this technology, with a focus on vertical high-resolution to measure temperatures in shallow thermohaline environments. It also presents a new method to manually calibrate temperatures along the optical fiber achieving significant improved resolution. The vertical high-resolution DTS system is used to monitor the thermal behavior of a salt-gradient solar pond, which is an engineered shallow thermohaline system that allows collection and storage of solar energy for a long period of time. The vertical high-resolution DTS system monitors the temperature profile each 1.1 cm vertically and in time averages as small as 10 s. Temperature resolution as low as 0.035 °C is obtained when the data are collected at 5-min intervals.

The study of the Raman-based optical fiber-folded distributed temperature sensing system with simplex code

2018 ◽  
Vol 420 ◽  
pp. 200-204 ◽  
Author(s):  
YanPing Wang ◽  
XiaoHong Sun ◽  
Qi Xue ◽  
Jie Ren ◽  
Fang Dang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Sensing System ◽  
Simplex Code

Case History - Steam Injection Monitoring with Optical Fiber Distributed Temperature Sensing

2010 ◽  
Author(s):  
Marcelo A. Pavanelli Batocchio ◽  
Adriana Lucia Cerri Triques ◽  
Hardy Leonardo Pinto ◽  
Luiz otavio Lima ◽  
Carlos Sales Souza ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Case History ◽  
Steam Injection ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing

scholarly journals Distributed Temperature Sensing System Based on Brillouin Scattering Effect Using a Single-Photon Detector

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Liwen Sheng ◽  
Jisong Yan ◽  
Ligong Li ◽  
Ming Yuan ◽  
Shuai Zhou ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Dynamic Range ◽  
Single Photon ◽  
Direct Detection ◽  
Brillouin Scattering ◽  
Temperature Error ◽  
Measured Temperature ◽  
Distributed Temperature Sensing ◽  
Photon Detector ◽  
Single Photon Detector

Utilizing a single-photon detector, a novel direct-detection optical-fiber sensor for distributed measurement of temperature based on spontaneous Brillouin scattering is proposed and demonstrated experimentally. In our scheme, the ratio of the backscattered Rayleigh signal and the backscattered Brillouin anti-Stokes is adopted to retrieve the monitored temperature information along the optical fiber. Taking advantage of the high sensitivity of the single-photon detector, our proposed system achieves a dynamic range of 20 dB without any optical amplification. The obtainable dynamic range corresponds to a sensing distance of 120 km with a measured temperature error of 0.96°C. Furthermore, the proof-of-concept experiment demonstrates 1.2 m spatial resolution over 4.2 km sensing link with 1.24°C temperature error. Considering the performance we achieved now, and the increasing improvement of the fabrication technology of sing-photon detector, the photon-counting distributed Brillouin sensor is opening a door in the field of optical-fiber sensors.

scholarly journals Assessment of a vertical high-resolution distributed-temperature-sensing system in a shallow thermohaline environment

2011 ◽  
Vol 8 (1) ◽  
pp. 29-58
Author(s):  
F. Suárez ◽  
J. E. Aravena ◽  
M. B. Hausner ◽  
A. E. Childress ◽  
S. W. Tyler
Keyword(s):  
High Resolution ◽  
Temperature Sensing ◽  
Distributed Temperature Sensing ◽  
Temperature Resolution ◽  
Spatial And Temporal Scales ◽  
Solar Pond ◽  
Salt Gradient ◽  
Corrosive Environments ◽  
First Time ◽  
And Storage

Abstract. In shallow thermohaline-driven lakes it is important to measure temperature on fine spatial and temporal scales to detect stratification or different hydrodynamic regimes. Raman spectra distributed temperature sensing (DTS) is an approach available to provide high spatial and temporal temperature resolution. A vertical high-resolution DTS system was constructed to overcome the problems of typical methods used in the past, i.e., without disturbing the water column, and with resistance to corrosive environments. This system monitors the temperature profile each 1.1 cm vertically and in time averages as small as 10 s. Temperature resolution as low as 0.035 °C is obtained when the data are collected at 5-min intervals. The vertical high-resolution DTS system is used to monitor the thermal behavior of a salt-gradient solar pond, which is an engineered shallow thermohaline system that allows collection and storage of solar energy for a long period of time. This paper describes a method to quantitatively assess accuracy, precision and other limitations of DTS systems to fully utilize the capacity of this technology. It also presents, for the first time, a method to manually calibrate temperatures along the optical fiber.

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