TY - GEN
T1 - Bioinspired optical fiber sensor for simultaneous shear and vertical forces monitoring
AU - Tavares, Cátia
AU - Domingues, M. Fátima
AU - Alberto, Nélia
AU - Ramos, António
AU - Rocon, Eduardo
AU - André, Paulo
AU - Silva, Hugo
AU - Antunes, Paulo
N1 - Funding Information:
This work is funded by FCT/MEC through national funds and when applicable co-funded by FEDER – PT2020 partnership agreement under the project UID/EEA/50008/2019, within REACT (FCT-IT-LA) (M. Fatima Domingues) and PREDICT (FCT-IT-LA) (N. Alberto) scientific actions. Cátia Tavares acknowledges Fundação para a Ciência e Tecnologia (FCT) for the grant with the reference PD/BD/142787/2018.
Publisher Copyright:
© 2019 SPIE.
PY - 2019
Y1 - 2019
N2 - This work reports the development of a bioinspired sensor capable of measuring vertical and shear (tangential) forces. The sensor is composed of two materials, the polylactide (PLA) and epoxy resin, combined with a photosensitive optical fiber with two fiber Bragg gratings (FBG1 and FBG2). The FBG1 was placed in a cavity filled with epoxy resin, while FBG2 was between the cavity and the shear wall that undergoes shear force. This FBGs’ encapsulation allowed one of them to be affected by vertical and shear forces (FBG1), while FBG2 was only affected by shear force. The calibration and performance tests were carried out with the aid of an electronic tri-axial force sensor. From these tests, sensitivities of K1V= 0.02±2.35x10-4 nm/N; K1S= 0.13±3.25x10-3 nm/N; K2V= -2.88x10-4±6.72x10-5 nm/N and K2S= -1.77±0.03 nm/N to each type of force, for FBG1 and FBG2, respectively, were achieved. The obtained results demonstrated the reliability of the developed solution, with a significant improvement of its sensitivity to shear force, and a low production complexity, when compared to other previously reported optical sensors.
AB - This work reports the development of a bioinspired sensor capable of measuring vertical and shear (tangential) forces. The sensor is composed of two materials, the polylactide (PLA) and epoxy resin, combined with a photosensitive optical fiber with two fiber Bragg gratings (FBG1 and FBG2). The FBG1 was placed in a cavity filled with epoxy resin, while FBG2 was between the cavity and the shear wall that undergoes shear force. This FBGs’ encapsulation allowed one of them to be affected by vertical and shear forces (FBG1), while FBG2 was only affected by shear force. The calibration and performance tests were carried out with the aid of an electronic tri-axial force sensor. From these tests, sensitivities of K1V= 0.02±2.35x10-4 nm/N; K1S= 0.13±3.25x10-3 nm/N; K2V= -2.88x10-4±6.72x10-5 nm/N and K2S= -1.77±0.03 nm/N to each type of force, for FBG1 and FBG2, respectively, were achieved. The obtained results demonstrated the reliability of the developed solution, with a significant improvement of its sensitivity to shear force, and a low production complexity, when compared to other previously reported optical sensors.
KW - Bioinspired optical fiber sensor
KW - Fiber Bragg grating
KW - Shear force sensor
KW - Vertical force sensor
UR - http://www.scopus.com/inward/record.url?scp=85073908957&partnerID=8YFLogxK
U2 - 10.1117/12.2522330
DO - 10.1117/12.2522330
M3 - Conference contribution
AN - SCOPUS:85073908957
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Sensors 2019
A2 - Baldini, Francesco
A2 - Homola, Jiri
A2 - Lieberman, Robert A.
PB - SPIE
T2 - Optical Sensors 2019
Y2 - 1 April 2019 through 4 April 2019
ER -