光子学报, 2018, 47 (3): 0306006, 网络出版: 2018-02-01
基于Terfenol-D材料和光纤光栅法布里珀罗腔的磁场传感器
Magnetic Sensor Based on Terfenol-D Materials and Fiber Bragg Grating Fabry-Perot Cavity
光纤传感器 光纤布喇格光栅 光纤光栅法布里珀罗腔 磁致伸缩材料 磁场 温度 Fiber optic sensors Fiber Bragg grating Fiber Bragg grating Fabry-Perot cavity Magnetostrictive material Magnetic field Temperature
摘要
基于Terfenol-D磁致伸缩材料和光纤光栅法布里珀罗腔, 提出了一种用于微弱静态磁场测量的光纤磁场传感器.为了提高传感器的分辨率, 采用钕铁硼永磁体提供偏置磁场, 同时, 采用Monel-400合金与光纤光栅法布里珀罗腔耦合的方式, 作为参考元件, 对传感器进行温度补偿.实验测得传感器的磁场灵敏度为1.7×10-3 pm/μT, 磁场分辨率为3.0 μT。实验结果表明, 本传感器对于静态磁场响应具有良好的线性度和指向性, 可用于微弱磁场测量.
Abstract
A fiber optic magnetic sensor for the measurement of weak static magnetic field, based on Terfenol-D materials and Fiber Bragg Grating Fabry-Perot (FBG-FP) cavity, is proposed and demonstrated. In order to improve the sensitivity of the sensor, a NdFeB magnet is used to apply bias magnetic field. To compensate the environmental temperature, another FBG-FP coupled with Monel-400 is used as a reference. The measurement sensitivity of the sensor is 1.7×10-3 pm/μT, which results in a magnetic induction resolution of 3.0 μT. The experimental results show that the sensor exhibits excellent linearity and directivity in response to static magnetic field.
马瑞, 张文涛, 王兆刚, 黄稳柱, 李芳. 基于Terfenol-D材料和光纤光栅法布里珀罗腔的磁场传感器[J]. 光子学报, 2018, 47(3): 0306006. MA Rui, ZHANG Wen-tao, WANG Zhao-gang, HUANG Wen-zhu, LI Fang. Magnetic Sensor Based on Terfenol-D Materials and Fiber Bragg Grating Fabry-Perot Cavity[J]. ACTA PHOTONICA SINICA, 2018, 47(3): 0306006.
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