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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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A Polymer Optical Fiber Temperature Sensor Based on Material Features.

Arnaldo Leal-Junior1, Anselmo Frizera-Netoc2, Carlos Marques3

  • 1Graduate Program of Electrical Engineering, Federal University of Espirito Santo, 29075-910 Vitória-ES, Brazil. arnaldo.leal@aluno.ufes.br.

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|January 20, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a polymer optical fiber (POF) temperature sensor. It leverages changes in POF mechanical properties under stress to accurately measure temperature, outperforming existing POF sensors.

Keywords:
dynamic mechanical analysispolymer optical fibertemperature sensor

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Area of Science:

  • Materials Science
  • Optical Engineering
  • Sensor Technology

Background:

  • Polymer optical fibers (POFs) offer unique properties for sensing applications.
  • Temperature sensing often relies on intensity variations, which can be affected by external factors.
  • Developing robust and sensitive POF-based temperature sensors is crucial for various industrial and research fields.

Purpose of the Study:

  • To develop and characterize a novel polymer optical fiber (POF)-based temperature sensor.
  • To investigate the relationship between temperature, mechanical properties, and optical output power in POFs.
  • To evaluate the performance of the proposed sensor in terms of sensitivity, linearity, and operational temperature range.

Main Methods:

  • Utilized a polymer optical fiber (POF) as the sensing element.
  • Applied constant stress to the POF via a 180° curvature, modulated by fixed supports.
  • Characterized POF mechanical properties using dynamic mechanical analysis (DMA).
  • Measured output power variations against temperature to determine sensor performance.

Main Results:

  • The developed POF temperature sensor demonstrated a sensitivity of 1.04 × 10-3 °C-1.
  • Achieved high linearity (0.994) and a low root mean squared error (1.48 °C), resulting in <2% relative error.
  • The sensor successfully operated at temperatures up to 110 °C, exceeding the performance of similar POF sensors.

Conclusions:

  • The proposed POF-based temperature sensor effectively utilizes the stress-optical effect for accurate temperature measurement.
  • Its performance metrics, including sensitivity and operational range, surpass those of existing intensity-variation-based POF temperature sensors.
  • This sensor presents a promising alternative for high-temperature sensing applications where conventional methods may be limited.