Parallel magnetic ring GMM-FBG current sensing device under prestress

CHEN Xingang; ZOU Zhengting; MA Zhipeng; ZHANG Zhixian; LI Song; YANG Xin

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Parallel magnetic ring GMM-FBG current sensing device under prestress

Design & Manufacture | 更新时间：2026-03-01

- Parallel magnetic ring GMM-FBG current sensing device under prestress
- Vol. 45, Issue 2, Pages: 116-122(2026)
- 作者机构：
  
  1. 重庆理工大学电气与电子工程学院,重庆,400054
  2. 重庆市能源互联网工程技术研究中心,重庆,400054
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP212;TN253
- Published：2026
- 稿件说明：
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CHEN Xingang, ZOU Zhengting, MA Zhipeng, et al. Parallel magnetic ring GMM-FBG current sensing device under prestress[J]. 2026, 45(2): 116-122.
DOI：

CHEN Xingang, ZOU Zhengting, MA Zhipeng, et al. Parallel magnetic ring GMM-FBG current sensing device under prestress[J]. 2026, 45(2): 116-122. DOI：

摘要

针对超磁致伸缩材料的光纤布拉格光栅(GMM-FBG)电流传感器响应灵敏度低和FBG易受环境温度干扰的问题，设计了一种预加应力下的异形GMM结构和平行磁环式聚磁回路设计的GMM-FBG传感器。首先，构建了该传感器的理论模型，并通过COMSOL仿真，在预加应力下比较圆柱形GMM棒和异形GMM棒的响应特性，针对FBG的栅区长度对GMM的结构尺寸进行优化。然后

对磁环结构进行分析，得到合适的形状和磁路间距。最后，利用差分的方式消除环境温度的影响，并以实验得到2个FBG的中心波长差值与被测电流的关系。结果表明:方形磁环的磁通分布更均匀，异形GMM棒在预加应力为30MPa，磁路间距为60mm，输入电流为0~100A时传感系统灵敏度为17.13pm/A。

Abstract

Aiming at the problems of low response sensitivity of giant magnetostrictive material-based fiber Bragg grating(GMM-FBG) current sensor and FBG is easy to be disturbed by ambient temperature

a GMM-FBG sensor with special-shaped GMM structure and parallel magnetic loop is designed under prestress.Firstly

the theoretical model of the sensor is constructed

and the response characteristics of the cylindrical GMM rod and the special-shaped GMM rod are compared under prestress by COMSOL simulation

and the structure size of the GMM is optimized according to the gate length of the FBG.Then

the structure of the magnetic ring is analyzed

and the appropriate shape and magnetic circuit spacing are obtained.Finally

the influence of ambient temperature is eliminated by means of difference.The relationship between the difference of the central wavelength of the two FBGs and the measured current is obtained by experiment.The results show that the magnetic flux distribution of the square magnetic ring is more uniform

the sensitivity of the sensing system is 17.13pm/A when the prestress of the special-shaped GMM rod is 30MPa

the magnetic circuit spacing is 60mm

and the input current is 0~100A.

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