6 April 2012 Fiber optic shape sensing for monitoring of flexible structures
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Abstract
Recent advances in materials science have resulted in a proliferation of flexible structures for high-performance civil, mechanical, and aerospace applications. Large aspect-ratio aircraft wings, composite wind turbine blades, and suspension bridges are all designed to meet critical performance targets while adapting to dynamic loading conditions. By monitoring the distributed shape of a flexible component, fiber optic shape sensing technology has the potential to provide valuable data during design, testing, and operation of these smart structures. This work presents a demonstration of such an extended-range fiber optic shape sensing technology. Three-dimensional distributed shape and position sensing is demonstrated over a 30m length using a monolithic silica fiber with multiple optical cores. A novel, helicallywound geometry endows the fiber with the capability to convert distributed strain measurements, made using Optical Frequency-Domain Reflectometry (OFDR), to a measurement of curvature, twist, and 3D shape along its entire length. Laboratory testing of the extended-range shape sensing technology shows
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Evan M. Lally, Evan M. Lally, Matt Reaves, Matt Reaves, Emily Horrell, Emily Horrell, Sandra Klute, Sandra Klute, Mark E. Froggatt, Mark E. Froggatt, } "Fiber optic shape sensing for monitoring of flexible structures", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83452Y (6 April 2012); doi: 10.1117/12.917490; https://doi.org/10.1117/12.917490
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