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Design Method of Three-Component Optic Fiber Balance Based on Fabry-Perot Displacement Sensor
Bin Xu1,2, Shien Yu2, Jianzhong Zhang1
1Key Laboratory of In-fiber Integratd Optics of Ministry of Education, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150000, China.
Sensors (Basel, Switzerland)
|September 9, 2023
Summary
This study introduces a novel optic fiber balance using Fabry-Perot displacement technology for precise wind tunnel force measurements. This innovative sensor offers superior sensitivity and linearity, overcoming limitations of traditional strain balances.
Area of Science:
- Aerospace Engineering
- Optical Metrology
- Sensor Technology
Background:
- Traditional wind tunnel balances face a trade-off between stiffness and sensitivity.
- Existing force measurement systems struggle to meet the demands of short-duration, high-force tests.
Purpose of the Study:
- To develop and validate a new three-component optic fiber balance for wind tunnel applications.
- To leverage Fabry-Perot displacement sensing for enhanced force measurement accuracy and sensitivity.
Main Methods:
- Designed a three-component optic fiber balance integrated with a pulse wind tunnel balance structure.
- Employed Fabry-Perot displacement measurement technology for force sensing.
- Conducted simulation analysis and experimental verification, including calibration and performance tests.
Main Results:
- Fabry-Perot sensors demonstrated high sensitivity to cavity length changes.
- The optic fiber balance achieved high sensitivity and linearity, with errors less than 6%.
- Calibration accuracy for each component surpassed traditional strain balances, achieving better than 0.13%.
Conclusions:
- The proposed optic fiber balance effectively addresses the stiffness-sensitivity conflict in force measurement systems.
- This technology offers a promising solution for accurate and sensitive force measurements in demanding wind tunnel environments.
- The design allows for sensitivity gains without altering existing balance structures.
