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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Fiber Bragg grating-based sensor for torque and angle measurement in a series elastic actuator's spring

Full text
Author(s):
Sanchez, Manuel R. A. [1] ; Leal-Junior, Arnaldo G. [1] ; Segatto, V, Marcelo ; Marques, Carlos [2] ; dos Santos, Wilian M. [3] ; Siqueira, Adriano A. G. [3] ; Frizera, Anselmo [4]
Total Authors: 7
Affiliation:
[1] Univ Fed Espirito Santo, Grad Program Elect Engn, BR-29075910 Vitoria - Brazil
[2] Inst Telecomunicacoes, Campus Univ Santiago, P-3810193 Aveiro - Portugal
[3] Univ Sao Paulo, Engn Sch Sao Carlos, Dept Mech Engn, BR-13566590 Sao Carlos, SP - Brazil
[4] Segatto, Marcelo, V, Univ Fed Espirito Santo, Grad Program Elect Engn, BR-29075910 Vitoria - Brazil
Total Affiliations: 4
Document type: Journal article
Source: APPLIED OPTICS; v. 57, n. 27, p. 7883-7890, SEP 20 2018.
Web of Science Citations: 3
Abstract

Conventional technologies to monitor torque feedback and angle in exoskeleton actuators are bulky and sensitive to misalignments, and do not allow for multiplexed operation. Fiber Bragg grating (FBG)-based sensors are a robust sensing approach that are desirable for multi-parametric monitoring. Temperature, strain, torque, and angle are widely studied in human-robot interaction. In order to acquire the torque and angle of deflection in the torsional spring of a series elastic actuator, an experimental setup with the spring and an array of three FBGs is submitted to repeated torques and angles. This paper presents the characterization and validation of the FBG-based sensor for measuring by torque and angle variations. Temperature cross-sensitivity is derived by the use of a non-strain FBG. The developed sensor presented high linearity and small error for torque and angle measurements. (C) 2018 Optical Society of America (AU)

FAPESP's process: 11/04074-3 - Development of an interactive robotic device for rehabilitation of injuries of the knee
Grantee:Wilian Miranda dos Santos
Support type: Scholarships in Brazil - Master
FAPESP's process: 13/14756-0 - Adaptive variable impedance applied to robotic rehabilitation of walking
Grantee:Adriano Almeida Gonçalves Siqueira
Support type: Regular Research Grants