摘要
为了提高GMM-FBG电流传感器的电流响应灵敏度,设计了一种新型杠杆式GMM-FBG光纤电流传感器。应用杠杆原理,使布拉格光纤光栅受力增大,从而提高GMM-FBG电流传感器的灵敏度。构建了传感器的理论模型,对传感器性能进行了分析;采用COMSOL有限元数值分析法,建立了传感器三维模型,针对传感器的关键参数进行仿真优化。仿真结果表明,当设计传感器中GMM是半径为1mm,高度为26mm的圆柱,不锈钢条的尺寸为32mm×1.4mm×2mm时,在0~100A输入电流范围内,线性度为0.999,灵敏度0.0406nm/A;当FBG解调仪的分辨率为1.64pm时,传感器最小可测的电流为0.04 A。
In order to improve the current response sensitivity of the GMM-FBG current sensor,a new lever-type GMM-FBG optical fiber current sensor is designed.Applying the principle of lever,the force of the Bragg fiber grating is increased,thereby improving the sensitivity of the GMM-FBG current sensor.Theoretical model of the sensor is constructed and the performance of the sensor is analyzed.Using the COMSOL finite element numerical analysis method,a three-dimensional model of the sensor is established,and the key parameters of the sensor are simulated and optimized.The simulation results show that when the GMM in the design sensor is a cylinder with a radius of 1 mm and a height of 26 mm,and the size of the stainless steel bar is 32 mm×1.4 mm×2 mm,the linearity is within the range of 0~100 A input current 0.999,sensitivity 0.0406 nm/A;when the resolution of the FBG demodulator is 1.64 pm,the minimum measurable current of the sensor is 0.04 A.
作者
郁聪
张家洪
赵振刚
李英娜
李川
YU Cong;ZHANG Jiahong;ZHAO Zhengang;LI Yingna;LI Chuan(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China)
出处
《光学技术》
CAS
CSCD
北大核心
2020年第4期415-419,共5页
Optical Technique
基金
国家自然科学基金(61765009,51667011,61962031)。
