1. The Temperature Compensation of FBG Sensor for Monitoring the Stress on Hole-Edge
- Author
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Feifei Ren, Weifang Zhang, Yingwu Li, Yudong Lan, Yukuan Xie, and Wei Dai
- Subjects
FBG sensor ,Fourier curve-fitting ,temperature compensation ,hole structure ,aircraft. ,Applied optics. Photonics ,TA1501-1820 ,Optics. Light ,QC350-467 - Abstract
To apply Fiber Bragg Grating (FBG) sensors in the hole structural health monitoring of aircraft, this study investigates a temperature compensation algorithm based on Fourier curve-fitting, combined with an analysis of FBG layout. The results identify that the wavelengths have a linear relationship with stress and temperature and the linear correlation coefficients are all greater than 0.9. In the experiment, the temperature range was 17 °C-100 °C (step is 10 °C) and the tensile force changed from 0 N to 10 KN (step is 1 KN). With the Fourier curve-fitting of the wavelength variation, the temperature compensation can be actualized, and the average error of temperature is 0.17 °C. By integrating the algorithm in the self-developed FBG interrogation system, the real-time monitoring of stress is achieved with the average error of stress is 3.9 με.
- Published
- 2018
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