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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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A New Type of Dynamic Vibration Fiber Sensor.

I-Nan Chang1, Chih-Chuan Chiu2, Wen-Fung Liu2

  • 1Department of Electronic Engineering, Feng Chia University, Taichung 40724, Taiwan.

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Summary
This summary is machine-generated.

This study introduces novel fiber Bragg grating vibration sensors with specialized packaging. These sensors demonstrate effective mechanical vibration monitoring across various frequencies, suitable for industrial and seismic applications.

Keywords:
fiber Bragg gratingfiber sensorsvibration wave sensors

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Area of Science:

  • Optical Engineering
  • Mechanical Engineering
  • Sensor Technology

Background:

  • Mechanical vibration monitoring is crucial for industrial facilities and seismic activity detection.
  • Existing vibration sensors may have limitations in frequency response or sensitivity.
  • Fiber Bragg gratings offer a robust platform for sensing applications.

Purpose of the Study:

  • To propose and evaluate a new type of vibration sensor utilizing fiber Bragg gratings.
  • To investigate different sensing structures for enhanced vibration measurement.
  • To assess the performance of these sensors in various frequency ranges.

Main Methods:

  • Development of three distinct sensing structures: film squeeze, new film squeeze, and elastic tape squeeze.
  • Experimental testing to determine the frequency response and sensitivity of each structure.
  • Application of wavelet transformation for analyzing steady-state and non-steady-state vibration signals.

Main Results:

  • The new film squeeze structure exhibits good sensing performance from 100 to 1000 Hz with a sensitivity of 0.302 mV/g.
  • The elastic tape squeeze structure provides a good frequency response from 1100 to 3100 Hz.
  • Wavelet transformation successfully confirmed the tested vibration signals.

Conclusions:

  • The proposed fiber Bragg grating vibration sensors are effective for mechanical vibration monitoring.
  • The specialized packaging and distinct sensing structures allow for tailored frequency response.
  • Potential applications include high-end manufacturing and earthquake vibration measurement.