25 October 2016 A fiber Bragg grating sensor system for estimating the large deflection of a lightweight flexible beam
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Proceedings Volume 10158, Optical Communication, Optical Fiber Sensors, and Optical Memories for Big Data Storage; 101580Q (2016) https://doi.org/10.1117/12.2246769
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China
Abstract
A sensor system based on fiber Bragg grating (FBG) is presented which is to estimate the deflection of a lightweight flexible beam, including the tip position and the tip rotation angle. In this paper, the classical problem of the deflection of a lightweight flexible beam of linear elastic material is analysed. We present the differential equation governing the behavior of a physical system and show that this equation although straightforward in appearance, is in fact rather difficult to solve due to the presence of a non-linear term. We used epoxy glue to attach the FBG sensors to specific locations upper and lower surface of the beam in order to measure local strain measurements. A quasi-distributed FBG static strain sensor network is designed and established. The estimation results from FBG sensors are also compared to reference displacements from the ANSYS simulation results and the experimental results obtained in the laboratory in the static case. The errors of the estimation by FBG sensors are analysed for further error-correction and option-design. When the load weight is 20g, the precision is the highest, the position errors ex and ex are 0.19%, 0.14% respectively, the rotation error eθ, is 1.23%.
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Te Peng, Te Peng, Yangyang Yang, Yangyang Yang, Lina Ma, Lina Ma, Huayong Yang, Huayong Yang, } "A fiber Bragg grating sensor system for estimating the large deflection of a lightweight flexible beam ", Proc. SPIE 10158, Optical Communication, Optical Fiber Sensors, and Optical Memories for Big Data Storage, 101580Q (25 October 2016); doi: 10.1117/12.2246769; https://doi.org/10.1117/12.2246769
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