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Design and characteristic analysis of micro multi-core fiber vibration sensor
Kun Li1,2,3, Mingli Dong1,2,3, Wu Zhao4
1Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing, 100192, China.
Heliyon
|September 17, 2024
Summary
We developed a compact fiber grating vibration sensor (0.25g) for precise mechanical vibration measurement. This miniaturized sensor offers high sensitivity and low cross-interference, ideal for size-constrained applications.
Area of Science:
- Optical Engineering
- Sensor Technology
- Materials Science
Background:
- Miniaturized sensors are crucial for applications with strict size and weight limitations.
- Fiber Bragg gratings offer advantages for sensing due to their immunity to electromagnetic interference and multiplexing capabilities.
Purpose of the Study:
- To propose and fabricate a miniaturized multi-core fiber grating vibration sensor.
- To evaluate the performance and sensitivity of the developed vibration sensor.
Main Methods:
- Fabrication of a miniaturized multi-core fiber grating sensor (10x10x10 mm, 0.25g).
- Finite element analysis (FEA) for performance prediction.
- Experimental testing to validate sensitivity and cross-interference.
Main Results:
- The sensor demonstrated sensitivities of 68.72 pm/g (X-direction) and 64.52 pm/g (Y-direction).
- Operating frequency range established as 20-240 Hz.
- Cross-interference between measurement directions was less than 4%.
Conclusions:
- The miniaturized fiber grating sensor is suitable for mid-low frequency mechanical vibration measurement.
- Its small size, low mass, and distributed measurement capabilities make it ideal for specialized applications.
- The sensor validates the potential of multi-core fiber gratings for compact vibration sensing solutions.
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