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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Novel Fiber-Optic Ring Acoustic Emission Sensor.

Peng Wei1, Xiaole Han2, Dong Xia3

  • 1School of Instrumentation Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China. weipeng@buaa.edu.cn.

Sensors (Basel, Switzerland)
|January 19, 2018
PubMed
Summary
This summary is machine-generated.

A novel fiber-optic ring acoustic emission sensor overcomes limitations of traditional piezoelectric sensors in extreme environments. This new sensor offers high sensitivity and resistance to interference and corrosion, enabling reliable acoustic emission detection.

Keywords:
acoustic emissionfiber-optic ring sensorsensing skeleton

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Area of Science:

  • Materials Science
  • Sensor Technology
  • Optoelectronics

Background:

  • Conventional piezoelectric acoustic emission sensors face limitations in extreme environments like high pressure, heavy electromagnetic interference, and corrosive conditions.
  • There is a need for robust acoustic emission sensors capable of operating reliably in harsh industrial and scientific settings.

Purpose of the Study:

  • To propose and demonstrate a novel fiber-optic ring acoustic emission sensor designed for extreme environments.
  • To evaluate the performance of the new sensor against traditional piezoelectric sensors.

Main Methods:

  • Introduction of a novel fiber-optic ring sensor design incorporating a sensing skeleton and sensing fiber.
  • Development and application of a heterodyne interferometric demodulating method for signal processing.
  • Experimental validation using sinusoidal and broken lead signals on an aluminum plate.

Main Results:

  • The fiber-optic ring sensor successfully detected acoustic emission signals, including 150 kHz sinusoidal waves and broken lead signals.
  • The sensor demonstrated high sensitivity, anti-electromagnetic interference, and corrosion resistance.
  • Experimental comparisons confirmed the availability and reliability of the fiber-optic sensor over piezoelectric counterparts.

Conclusions:

  • The novel fiber-optic ring acoustic emission sensor is a viable alternative for detecting acoustic emissions in harsh environments.
  • This technology offers a new pathway for acoustic emission monitoring where conventional sensors fail.
  • Further development promises enhanced capabilities for specialized industrial applications.