Angle transducer based on fiber Bragg gratings able for tunnel auscultation
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AuthorQuintela Incera, Antonio; Lázaro Urrutia, José Miguel; Quintela Incera, María Ángeles; Mirapeix Serrano, Jesús María; Muñoz Berti, Víctor Manuel; López Higuera, José Miguel
© 2010 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Proceedings of SPIE, 2010, vol. 7653, 765318
Fourth European Workshop on Optical Fibre Sensors, Oporto, 2010
SPIE Society of Photo-Optical Instrumentation Engineers
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Fiber Bragg grating
In this paper an angle transducer based on Fiber Bragg Grating (FBG) is presented. Two gratings are glued to a metallic platen, one in each side. It is insensitive to temperature changes, given that the temperature shifts affect equally to both FBG. When the platen is uniformly bent an uniform strain appears in both sides of the platen. It depends on the bend angle and the platen length and thickness. The transducer has been designed to be used in the auscultation of tunnels during their construction process and during their live time. The transducer design and its characterization are presented.