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RDTS-Based Two-Dimensional Temperature Monitoring with High Positioning Accuracy Using Grid Distribution
1The Key Laboratory of Optoelectronic Technology & System, Education Ministry of China, Chongqing 400044, China.
Sensors (Basel, Switzerland)
|November 21, 2019
Summary
A new Raman distributed temperature sensing (RDTS) method achieves 0.1m positioning accuracy. This technique uses optical fiber routing for precise heat source location on various surfaces, with potential for 3D applications.
Area of Science:
- Optical Sensing Technologies
- Distributed Sensing Systems
- Metrology and Measurement
Background:
- Traditional positioning methods face limitations in accuracy and applicability.
- Raman distributed temperature sensing (RDTS) offers potential for enhanced spatial localization.
- Existing RDTS methods often involve tradeoffs between sensing distance and accuracy.
Purpose of the Study:
- To develop and validate a novel two-dimensional (2D) positioning method using RDTS.
- To achieve high-precision heat source localization without crosstalk.
- To explore the adaptability of the method for flat and curved surfaces and potential 3D extension.
Main Methods:
- Implementation of a 2D optical fiber distribution with specific routing rules.
- Utilization of tailored algorithms for heat source identification and localization.
- Employment of a Raman distributed temperature sensing (RDTS) system with 0.8m spatial resolution over 3km of multimode fiber (MMF).
Main Results:
- Achieved a positioning accuracy of approximately 0.1m without hardware modifications.
- Demonstrated effective heat source localization without crosstalk.
- Confirmed the method's applicability to both flat and curved surfaces (e.g., pipes, tanks).
Conclusions:
- The proposed 2D RDTS positioning method significantly enhances accuracy.
- The system offers flexibility for various surface geometries and can be extended to 3D.
- Further improvements in accuracy are possible with denser fiber arrangements, albeit at the cost of sensing length.
