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Raman Distributed Temperature Sensor with Optical Dynamic Difference Compensation and Visual Localization Technology

Baoqiang Yan1,2, Jian Li3,4, Mingjiang Zhang5,6

  • 1College of Physics & Optoelectronics, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China. yanbaoqiang0876@link.tyut.edu.cn.

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This summary is machine-generated.

This study introduces a new Raman distributed temperature sensing (RDTS) method for accurate tunnel fire detection. The enhanced technique improves temperature accuracy and enables visual fire localization in tunnels.

Keywords:
Raman distributed fiber sensoroptical dynamic difference compensationtunnel fire detectionvisual localization

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Area of Science:

  • Optoelectronics
  • Sensor Technology
  • Fire Safety Engineering

Background:

  • Tunnel fire detection demands high-accuracy temperature sensing and visual localization.
  • Existing Raman distributed temperature sensing (RDTS) systems face challenges with accuracy and visual identification.

Purpose of the Study:

  • To present a novel temperature demodulation method for enhancing RDTS accuracy.
  • To introduce visual localization technology for RDTS in tunnel fire detection.
  • To improve the engineering applicability of RDTS in critical infrastructure.

Main Methods:

  • Developed an optical dynamic difference compensation algorithm to mitigate optical power fluctuations.
  • Implemented a longitudinal lining model (LLM) for 3D temperature display and visual localization.
  • Applied these methods to a Raman distributed temperature sensing (RDTS) system.

Main Results:

  • Optimized temperature measurement accuracy from 7.0 °C to 1.9 °C.
  • Achieved this improvement over a sensing distance of 18.27 km.
  • Successfully demonstrated visual localization capabilities for tunnel fires.

Conclusions:

  • The novel demodulation method significantly enhances RDTS temperature accuracy.
  • The integrated visual localization technology improves the practical application of RDTS in tunnels.
  • This research offers a comprehensive solution for tunnel fire monitoring and visual localization.