Design and experiment study of two-dimensional force sensor based on fiber Bragg grating

被引：0
|
作者：
Sun S. [1 ,2 ]
Liao C. [1 ]
Li J. [2 ]
Meng Z. [1 ]
Xiang Y. [1 ]
机构：
[1] School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing
[2] School of Intelligent Engineering, College of Mobile Telecommunications, Chongqing University of Posts and Telecommunications, Chongqing
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2020年 / 41卷 / 02期
关键词：
Cross beam structure; Fiber Bragg grating; Inter-dimensional coupling; Two-dimensional force sensor;
D O I：
10.19650/j.cnki.cjsi.J1905937
中图分类号：
学科分类号：
摘要：
Aiming at the problems that current multi-dimensional force sensors can hardly simultaneously take into account electromagnetic interference, complicated wiring, large dimensional coupling and low sensitivity, this paper presents a two-dimensional force sensor based on fiber Bragg grating. Firstly, based on the theories of fiber Bragg grating sensing and bending deformation of simply supported beam, a sensor elastic body with cross beam structure is designed, and the mapping relationship between the fiber grating sensor wavelength drift and the force is derived. Then, the finite element analysis method is used to study the strain distribution characteristics of the elastic body and determine the optimal sticking position of the fiber Bragg grating. Finally, an experiment calibration platform was established to conduct experiment research on the sensitivity, linearity, inter-dimensional coupling error and repeatability error of the sensor. The experiment results show that the wavelength sensitivities of the sensor in the x and y directions are approximately 7.464 and 7.520 pm/N, the linearities are approximately 3% and 2%, the inter-dimensional coupling errors are approximately 1.01% and 0.218% and the repeatability errors are approximately 4.898% and 5.828%, respectively. The sensor can be applied to two-dimensional force measurement of the wrist of the robot and has great significance for improving the high-precision control feedback of the robot joint. © 2020, Science Press. All right reserved.
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页码：1 / 9
页数：8
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