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Updated: Jun 7, 2025
00:08
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
Published on: September 30, 2019
6.2K
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.
Sensors (Basel, Switzerland)
|November 9, 2024
Summary
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.
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.
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