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

Sanchez Manuel R. A.; Leal-Junior Arnaldo G.; Segatto Marcelo V; Marques Carlos; dos Santos Wilian M.; Siqueira Adriano A. G.; Frizera Anselmo

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

机译：基于光纤布拉格光栅，用于串联弹性执行器的弹簧中的扭矩和角度测量

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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

机译：传统技术以监测扭矩反馈和外骨骼致动器中的角度对未对准而敏感，并且不允许进行多路复用操作。基于纤维布拉格光栅（FBG）的传感器是一种坚固的感测方法，可用于多参数监测。在人机相互作用中广泛研究了温度，应变，扭矩和角度。为了获取串联弹性致动器的扭转弹簧中的扭矩和偏转角，将具有弹簧的实验设置和三个FBG阵列被提交到重复的扭矩和角度。本文介绍了基于FBG的传感器的表征和验证，用于通过扭矩和角度变化测量。通过使用非菌株FBG来得出温度交叉敏感性。开发的传感器为扭矩和角度测量呈现出高线性和小误差。（c）2018年光学学会

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《Applied optics》 |2018年第27期|共8页
作者
Sanchez Manuel R. A.; Leal-Junior Arnaldo G.; Segatto Marcelo V; Marques Carlos; dos Santos Wilian M.; Siqueira Adriano A. G.; Frizera Anselmo;
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Univ Fed Espirito Santo Grad Program Elect Engn BR-29075910 Vitoria Brazil;

Univ Fed Espirito Santo Grad Program Elect Engn BR-29075910 Vitoria Brazil;

Univ Fed Espirito Santo Grad Program Elect Engn BR-29075910 Vitoria Brazil;

Inst Telecomunicacoes Campus Univ Santiago P-3810193 Aveiro Portugal;

Univ Sao Paulo Engn Sch Sao Carlos Dept Mech Engn BR-13566590 Sao Carlos SP Brazil;

Univ Sao Paulo Engn Sch Sao Carlos Dept Mech Engn BR-13566590 Sao Carlos SP Brazil;

Univ Fed Espirito Santo Grad Program Elect Engn BR-29075910 Vitoria Brazil;

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

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