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5 April 2017 A load identification sensor based on distributed fiber optic technology
M. Ciminello, P. Bettini, S. Ameduri, S. Nicoli, A. Concilio, G. Sala
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Proceedings Volume 10170, Health Monitoring of Structural and Biological Systems 2017; 101702Z (2017) https://doi.org/10.1117/12.2260434
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States
Abstract
The manufacturing and the preliminary numerical and experimental testing results of a fiber optic based sensor, able to recognize different load paths, are herein presented. This device is conceived to identify load directions by strain detection along a circumferential geometry. A demonstrator is realized by manufacturing a circular shaped, flexible glass/epoxy laminate hosting the sensible elements. Three loops of optical fiber, laying at different quotes along its thickness, are there integrated. The sensor system is supposed to be bonded on the structural element and then able to follow its deformations under load. The working principle is based on the comparison of the strain paths detected at each fiber optic loop at homologous positions. Rayleigh backscattering optical technology is implemented to measure high spatial resolution strains. A finite element model is used to simulate the sensor behavior and assess its optimal configuration. A preliminary experimental campaign and a numerical correlation are performed to evaluate sensor performance considering in-plane and bending loads.
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M. Ciminello, P. Bettini, S. Ameduri, S. Nicoli, A. Concilio, and G. Sala "A load identification sensor based on distributed fiber optic technology", Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 101702Z (5 April 2017); https://doi.org/10.1117/12.2260434
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KEYWORDS
Optical fibers
Backscatter
Transducers
Aerospace engineering
Optics manufacturing
Finite element methods
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