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

Abstract

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.

Two-Dimensional Spatial Resolution in Plane Temperature Monitoring Based on Raman Distributed Temperature Sensor

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High performance Raman distributed high-temperature sensing system based on sapphire fiber

“…Temperature monitoring plays an important role in daily life, industrial production, scientific research, and other fields. On top of traditional thermocouples, various kinds of new sensors have been developed to realize temperature measurement with the continuous development of technologies 1 . Among these advancements, optical fiber sensing plays an irreplaceable role in fuel oil exploration, pipeline monitoring, and building health monitoring due to its micro-size, light-weight, immunity to electromagnetic interference, long detection distance and other advantages 2 .…”

Performance evaluation of Raman scattering-based distributed optical fiber temperature sensing system in cryogenic environment

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