27 April 2016 Embedding silica and polymer fibre Bragg gratings (FBG) in plastic 3D-printed sensing patches
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Abstract
This paper reports the first demonstration of a silica fibre Bragg grating (SOFBG) embedded in an FDM 3-D printed housing to yield a dual grating temperature-compensated strain sensor. We also report the first ever integration of polymer fibre Bragg grating (POFBG) within a 3-D printed sensing patch for strain or temperature sensing. The cyclic strain performance and temperature characteristics of both devices are examined and discussed. The strain sensitivities of the sensing patches were 0.40 and 0.95 pm/με for SOFBG embedded in ABS, 0.38 pm/με for POFBG in PLA, and 0.15 pm/με for POFBG in ABS. The strain response was linear above a threshold and repeatable. The temperature sensitivity of the SOFBG sensing patch was found to be up to 169 pm/°C, which was up to 17 times higher than for an unembedded silica grating. Unstable temperature response POFBG embedded in PLA was reported, with temperature sensitivity values varying between 30 and 40 pm/°C.
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Michal G. Zubel, Kate Sugden, David J. Webb, David Sáez-Rodríguez, Kristian Nielsen, Ole Bang, "Embedding silica and polymer fibre Bragg gratings (FBG) in plastic 3D-printed sensing patches", Proc. SPIE 9886, Micro-Structured and Specialty Optical Fibres IV, 98860N (27 April 2016); doi: 10.1117/12.2228753; https://doi.org/10.1117/12.2228753
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