Title
Six-Dimensional Force/Torque Sensor Based on Fiber Bragg Gratings With Low Coupling
Abstract
In this article, we present a fiber Bragg grating (FBG) based 6-D force/torque (F/T) sensor that can be mounted on robot joints for the detection of comprehensive F/T information. The sensor is designed based on a new concept of multilayer measurement in which the elastic structure is divided into four layers. A single optical fiber inscribed with 12 FBGs is symmetrically attached to the elastic structure to sense F/T-induced strains by means of differential measurements. Because of the mechanical decoupling function of the structure and the reasonable arrangement of the FBG sensing elements, the designed sensor possesses a great advantage of low cross coupling compared with the existing 6-D F/T sensors, which simplifies the calibration and maintenance of the sensor. Calibration experiments demonstrate high resolutions of 7.8 N·mm, 7.2 N·mm, 15.8 N·mm, 0.0067 N, 0.0066 N, and 0.0825 N within the range of ±1.56 N·m, ±1.56 N·m, ±1.56 N·m, ±10 N, ±10 N, and ±25 N for the detection of M <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> , M <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">y</sub> , M <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">z</sub> , F <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> , F <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">y</sub> , and F <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">z</sub> , respectively. Dynamic performances of the designed sensor have been evaluated in comparison with a commercial F/T sensor.
Year
DOI
Venue
2021
10.1109/TIE.2020.2982107
IEEE Transactions on Industrial Electronics
Keywords
DocType
Volume
Fiber Bragg grating (FBG),low coupling,robot,six-dimensional (6-D) force/torque (F/T) sensor
Journal
68
Issue
ISSN
Citations 
5
0278-0046
2
PageRank 
References 
Authors
0.40
0
6
Name
Order
Citations
PageRank
Xiong Li1287.79
Yongxing Guo221.08
Guozhang Jiang317227.25
Xinglin Zhou420.40
Lin Jiang554338.42
Honghai Liu61974178.69