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Related Concept Videos

Temperature Measurement Sites01:14

Temperature Measurement Sites

A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...

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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Simultaneous wavelength and frequency encoded microstructure based quasi-distributed temperature sensor.

Xiaolei Li1, Qizhen Sun, Duan Liu

  • 1Huazhong University of Science and Technology, college of Optoelectronic Science and Engineering, Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China.

Optics Express
|June 21, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces a novel microstructure sensor system for accurate temperature monitoring. The hybrid wavelength-division-multiplexing/frequency-division-multiplexing (WDM/FDM) system allows for dense sensor multiplexing along a single fiber.

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Area of Science:

  • Optoelectronics
  • Fiber optic sensing
  • Materials science

Background:

  • Accurate and dense temperature monitoring is crucial in various industrial and scientific applications.
  • Existing fiber optic sensing systems face limitations in multiplexing capacity and fabrication complexity.
  • Microstructure-based sensors offer potential for novel sensing functionalities.

Purpose of the Study:

  • To propose and demonstrate a novel microstructure-based temperature sensor system.
  • To leverage hybrid wavelength-division-multiplexing/frequency-division-multiplexing (WDM/FDM) for enhanced sensor multiplexing.
  • To achieve accurate temperature distribution measurement along a single optical fiber.

Main Methods:

  • Design and fabrication of a microstructure sensor using UV light irradiation on single-mode fiber.
  • Implementation of a hybrid WDM/FDM multiplexing scheme for encoding both frequency and wavelength information.
  • Development of a demodulation algorithm for accurate temperature calculation.
  • Experimental demonstration with 9 multiplexed microstructures.

Main Results:

  • The proposed sensor system utilizes a microstructure with low insertion loss, enabling dense multiplexing.
  • In theory, over 1000 sensors can be multiplexed on a single fiber.
  • Experimental validation achieved a temperature resolution of 0.4°C with 9 multiplexed sensors.

Conclusions:

  • The novel microstructure sensor system based on hybrid WDM/FDM is feasible and effective for distributed temperature sensing.
  • The simple fabrication method and high multiplexing potential make this system highly promising for practical applications.
  • This technology offers a significant advancement in high-resolution, densely multiplexed fiber optic temperature sensing.