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An Optical Fiber Lateral Displacement Measurement Method and Experiments Based on Reflective Grating Panel
Yuhe Li1, Kaisen Guan2, Zhaohui Hu3
1Department of Precision Instruments, Tsinghua University, State Key Laboratory of Precision Measurement Technology and Instruments, Beijing 100084, China. liyuhe@mail.tsinghua.edu.cn.
Sensors (Basel, Switzerland)
|June 9, 2016
Summary
This study presents a novel optical fiber sensor for precise lateral displacement measurement using a reflective grating panel. The method is effective even in high-temperature environments.
Area of Science:
- Optoelectronics
- Fiber Optic Sensors
- Metrology
Background:
- Traditional displacement sensors face limitations in high-temperature environments.
- Optical fiber sensing offers a robust alternative for harsh conditions.
Purpose of the Study:
- To demonstrate an optical fiber sensing method for lateral displacement measurement.
- To develop a sensor suitable for high-temperature applications.
Main Methods:
- Utilizing a homemade reflective grating panel with periodic refractive index variations to modulate light intensity.
- System design, optical path simulation, and intensity calculations for performance analysis.
- Experimental setup of a fiber optic grating ruler with a specialized probe.
Main Results:
- Successful detection of lateral displacement using the reflective grating panel.
- Demonstrated functions of optical signal counting, subdivision, and direction discernment.
- Effective performance validated through experiments with varying grating pitches and long-distance measurements.
Conclusions:
- The proposed optical fiber sensing method reliably measures lateral displacement.
- The system shows particular promise for applications in high-temperature working environments.
