The Temperature Compensation of FBG Sensor for Monitoring the Stress on Hole-Edge

The Temperature Compensation of FBG Sensor for Monitoring the Stress on Hole-Edge

Blog Article

Taurine 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 Syrups system, the real-time monitoring of stress is achieved with the average error of stress is 3.9 με.