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A Fiber Optic Ultrasonic Sensing System for High Temperature Monitoring Using Optically Generated Ultrasonic Waves.

Jingcheng Zhou1, Xu Guo2, Cong Du3

  • 1Department of Biomedical Engineering and Biotechnology, University of Massachusetts Lowell, 1 University Ave., MA, Lowell, 01854, USA. Jingcheng_Zhou@student.uml.edu.

Sensors (Basel, Switzerland)
|January 24, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a new fiber optic ultrasonic sensing system for high-temperature monitoring. The system successfully measured temperature up to 700°C using photoacoustic ultrasound generation and a Fabry-Perot interferometer.

Keywords:
Fabry-Perotfiber optic sensorhigh temperature monitoringphotoacousticultrasonic

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Area of Science:

  • Fiber optic sensing
  • Photoacoustic effect
  • Interferometry

Background:

  • Temperature measurement in harsh environments is challenging.
  • Existing methods may have limitations in accuracy or durability.
  • Acoustic pyrometry offers a non-contact temperature sensing approach.

Purpose of the Study:

  • To design and fabricate a novel fiber optic ultrasonic sensing system.
  • To utilize the photoacoustic (PA) ultrasound generation and Fabry-Perot interferometer principles.
  • To enable high-temperature monitoring applications.

Main Methods:

  • A fiber optic ultrasonic generator using carbon black-polydimethylsiloxane (PDMS) was developed.
  • A Fabry-Perot interferometer fiber sensor was employed as the receiver.
  • The system measured the temperature-dependent velocity of sound waves.

Main Results:

  • The system demonstrated effective ultrasound sensing capabilities.
  • High-temperature tests confirmed its measurement ability up to 700°C.
  • Test results showed good agreement with a reference sensor.

Conclusions:

  • The developed fiber optic ultrasonic sensing system is robust and suitable for high temperatures.
  • Potential applications include acoustic pyrometry and exhaust gas temperature monitoring.
  • This technology offers a promising solution for industrial temperature monitoring.