TY - JOUR
T1 - Plane-by-Plane Written, Low-Loss Polymer Optical Fiber Bragg Grating Arrays for Multiparameter Sensing in a Smart Walker
AU - Leal, Arnaldo G.
AU - Frizera, Anselmo
AU - Theodosiou, Antreas
AU - Díaz, Camilo
AU - Jimenez, Mario
AU - Min, Rui
AU - Pontes, Maria José
AU - Kalli, Kyriacos
AU - Marques, Carlos
N1 - Funding Information:
Manuscript received April 30, 2019; revised May 31, 2019; accepted May 31, 2019. Date of publication June 6, 2019; date of current version September 18, 2019. This work was supported in part by the CAPES under Grant 88887.095626/2015-01, Grant FAPES 85426300, and Grant 84336650, in part by the CNPq under Grant 304192/2016-3 and Grant 309003/2018-0, in part by the Petrobras under Grant 2017/00702-6, in part by the National Funds (OE), through FCT–Fundação para a Ciência e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5, and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. The work of C. Marques was supported in part by the FCT Program under Grant UID/CTM/50025/2019 and Grant SAICTPAC/0036/2015, in part by the National Funds through the Fundação para a Ciência e a Tecnologia/Ministério da Educação e Ciência, and in part by the European Regional Development Fund through the PT2020 Partnership Agreement. The associate editor coordinating the review of this paper and approving it for publication was Dr. Daniele Tosi. (Corresponding author: Arnaldo G. Leal-Junior.) A. G. Leal-Junior is with the Graduate Program of Electrical Engineering, Federal University of Espírito Santo, Vitória 29075-910, Brazil, and also with the Mechanical Engineering Department, Federal University of Espírito Santo, Vitória 29075-910, Brazil (e-mail: leal-junior.arnaldo@ieee.org).
Publisher Copyright:
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Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/10/15
Y1 - 2019/10/15
N2 - In this paper, we report the development of fiber Bragg gratings (FBGs) arrays in polymer optical fibers (POFs), specifically cyclic transparent optical polymer (CYTOP) fibers, using a femtosecond (fs) laser. The CYTOP is almost transparent to near-ultraviolet and visible light, thus femtosecond lasers appear to be a very promising technology for the development of gratings in such fibers. Bearing this in mind, we have applied the direct write, plane-by-plane inscription method to obtain 'single-peak' FBGs in long arrays. Following this, we examine the performance of a 5-FBG array applied in a smart walker (SW) and characterized for four different functionalities of the proposed healthcare device. The polymer sensors were used to analyze 1) structural health monitoring (SHM) of the SW's mechanical structure; 2) detection of users' movement intention; 3) gait cadence estimation; and 4) detection of floor-induced vibrations for localization and mapping applications. The good results obtained in comparison to commercially available devices show the suitability of the proposed FBG-array on the instrumentation of healthcare devices, where multiple parameters can be measured using the same fiber, which leads to a compact and energy efficient system.
AB - In this paper, we report the development of fiber Bragg gratings (FBGs) arrays in polymer optical fibers (POFs), specifically cyclic transparent optical polymer (CYTOP) fibers, using a femtosecond (fs) laser. The CYTOP is almost transparent to near-ultraviolet and visible light, thus femtosecond lasers appear to be a very promising technology for the development of gratings in such fibers. Bearing this in mind, we have applied the direct write, plane-by-plane inscription method to obtain 'single-peak' FBGs in long arrays. Following this, we examine the performance of a 5-FBG array applied in a smart walker (SW) and characterized for four different functionalities of the proposed healthcare device. The polymer sensors were used to analyze 1) structural health monitoring (SHM) of the SW's mechanical structure; 2) detection of users' movement intention; 3) gait cadence estimation; and 4) detection of floor-induced vibrations for localization and mapping applications. The good results obtained in comparison to commercially available devices show the suitability of the proposed FBG-array on the instrumentation of healthcare devices, where multiple parameters can be measured using the same fiber, which leads to a compact and energy efficient system.
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U2 - 10.1109/JSEN.2019.2921419
DO - 10.1109/JSEN.2019.2921419
M3 - Article
AN - SCOPUS:85072582920
SN - 1530-437X
VL - 19
SP - 9221
EP - 9228
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 20
M1 - 8732485
ER -
