光学技术, 2020, 46 (4): 415, 网络出版: 2020-10-27   

杠杆式GMM-FBG电流传感器的仿真设计

GMM-FBG fiber optic current sensor simulation design
作者单位
昆明理工大学 信息工程与自动化学院, 云南 昆明 650500
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。
Abstract
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 1mm and a height of 26mm, and the size of the stainless steel bar is 32mm×1.4mm×2mm, the linearity is within the range of 0~100A input current 0.999, sensitivity 0.0406nm/A; when the resolution of the FBG demodulator is 1.64pm, the minimum measurable current of the sensor is 0.04A.
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郁聪, 张家洪, 赵振刚, 李英娜, 李川. 杠杆式GMM-FBG电流传感器的仿真设计[J]. 光学技术, 2020, 46(4): 415. YU Cong, ZHANG Jiahong, ZHAO Zhengang, LI Yingna, LI Chuan. GMM-FBG fiber optic current sensor simulation design[J]. Optical Technique, 2020, 46(4): 415.

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