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18 December 2019 Research on impact energy measurement based on FBG and damping attenuation
Jian-ming Zhou, Jun-hui Hu, Jin-ying Fan, Zi-xiong Qin
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Proceedings Volume 11340, AOPC 2019: Optical Fiber Sensors and Communication; 113400P (2019) https://doi.org/10.1117/12.2542975
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China
Abstract
A demodulation based on the principle of fiber Bragg grating edge filter method is used to measure impact energy of acrylic plate (PMMA) and aluminum plate in this paper. A new demodulation method based on damping attenuation principle is proposed. Fiber Bragg grating sensing system is built in the experiment. The complex vibration wave generated by impact energy is processed by using the envelope of peak value in MATLAB. The experimental results show that using the time length corresponding to the peak attenuation of 10% as the demodulation basis has a higher Goodness of fit. The linear fitness of PMMA plate and aluminium plate is 0.94 and 0.89, respectively. At the same time, it is concluded that this method can be used to preliminarily determine whether the plate is viscoelastic or not. This is a new potential demodulation method for practical impact energy detection based on fiber Bragg grating.
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Jian-ming Zhou, Jun-hui Hu, Jin-ying Fan, and Zi-xiong Qin "Research on impact energy measurement based on FBG and damping attenuation", Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 113400P (18 December 2019); https://doi.org/10.1117/12.2542975
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KEYWORDS
Fiber Bragg gratings
Signal attenuation
Demodulation
Sensors
MATLAB
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