Instantaneous Area Based Online Detection of Bend Generated Error in a Raman Optical Fiber Distributed Temperature Sensor

Saxena, Manoj Kumar; Raju, S.D.V.S. Jagannadha; Arya, Rajesh; Pachori, Ram Bilas; Kher, Sanjay

doi:10.1109/lsens.2017.2726690

Cited by 8 publications

(1 citation statement)

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“…Therefore, distributed temperature fiber sensors based on Raman scattering are suitable for monitoring the temperature field of a heatsink. At present, the main applications of distributed temperature fiber sensors based on Raman scattering are usually power cables [8], tunnel fire warnings [9], gas pipeline monitoring [10], electric generator insulation faults [11], and applications in other fields such as mines and dams [12,13,14,15]. The sensor is rarely used in the vacuum and −173 °C environment created inside the heatsink.…”

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confidence: 99%

Monitoring a Heatsink Temperature Field Using Raman-Based Distributed Temperature Sensor in a Vacuum and −173 °C Environment

Zhang

Peng

Liu

2019

Sensors

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A heatsink is a large experimental device which is used to simulate the outer space environment. In this paper, a Raman-based distributed temperature sensor was used for real-time and continuous heatsink temperature monitoring, and a special Raman-based distributed temperature sensing method and system have been proposed. This method takes advantage of three calibration parameters (Δα, γ,C) to calculate the temperature. These three parameters are related to the attenuation of the optical fiber, the Raman translation, and the difference of optoelectronic conversion, respectively. Optical time domain reflectometry was used to calculate the location. A series of heatsink temperature measurement experiments were performed in a vacuum and −173 °C environment. When the temperature dropped to −100 °C, the parameter Δα was found to vary. A method was proposed to recalculate Δα and modify the traditional Raman fiber temperature equation. The results of the experiments confirmed the validity of this modified Raman fiber temperature equation. Based on this modified equation, the temperature field in the heatsink was calculated. The Raman-based distributed temperature sensor has potential applications in temperature measurement and judging the occurrence of faults in space exploration.

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