基于Terfenol-D与光纤光栅的高灵敏度磁场传感器

doi:10.3901/JME.2025.08.001

机械工程学报 ›› 2025, Vol. 61 ›› Issue (8): 1-8.doi: 10.3901/JME.2025.08.001

• 仪器科学与技术 • 上一篇

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基于Terfenol-D与光纤光栅的高灵敏度磁场传感器

何超江¹, 李鹏², 何存富², 王钰珏², 刘秀成²

1. 北京工业大学机械与能源工程学院北京 100124;
2. 北京工业大学信息科学技术学院北京 100124

收稿日期:2024-07-13 修回日期:2025-01-08 发布日期:2025-05-10
作者简介:何超江，男，1997年出生，博士研究生。主要研究方向为无损检测。E-mail：13798965845@163.com;刘秀成(通信作者)，男，1984年出生，博士，教授，博士研究生导师。主要研究方向为力学性能微磁无损测量、结构健康监(检)测技术与仪器。E-mail：xiuchliu@bjut.edu.cn
基金资助:
国家自然科学基金(12122201, 62271015, 12302237)和北京市自然科学基金(4232001，Z230004)资助项目。

High-sensitive Magnetic Field Sensor Based on Terfenol-D and Fiber Bragg Grating

HE Chaojiang¹, LI Peng², HE Cunfu², WANG Yujue², LIU Xiucheng²

1. College of Mechanical & Energy Engineering, Beijing University of Technology, Beijing 100124;
2. College of Information Science and Technology, Beijing University of Technology, Beijing 100124

Received:2024-07-13 Revised:2025-01-08 Published:2025-05-10

摘要/Abstract

摘要： 传统的磁场传感器易受环境电磁干扰，难以应用于复杂工况条件下的磁无损检测。因此研制了一种基于Terfenol-D与光纤光栅的磁场传感器，并提出一种基于静态偏置磁场调优的传感器灵敏度提升方法。首先，基于磁致伸缩和光纤光栅传感理论，建立基于Terfenol-D的光纤光栅磁场传感器模型，分析光纤光栅波长漂移量与Terfenol-D材料所受外加磁场强度的关系。其次，引入静态偏置磁场对Terfenol-D材料进行预先磁化，调整传感器对磁场变化的检测灵敏度，理论分析与试验测试结果均表明：通过静态偏置磁场调优可有效提升传感器的磁场检测灵敏度至9.38 pm/mT，相比未优化时提升了约8.55倍。最后，将优化后的基于Terfenol-D的光纤光栅磁场传感器应用于钢板漏磁检测，不仅实现了缺陷定位和缺陷深度定量表征，还表现出比传统霍尔传感器更优异的抗电磁干扰能力。

关键词: 磁致伸缩, Terfenol-D, 光纤光栅, 磁场传感器, 缺陷检测

Abstract: Traditional magnetic field sensors are susceptible to environmental electromagnetic interference, which is difficult to be applied to magnetic nondestructive testing under complex working conditions. Hence, a magnetic field sensor based on Terfenol-D and fiber grating is developed, and a sensor sensitivity enhancement method based on static bias magnetic field tuning is proposed. Firstly, based on the magnetostriction and fiber grating sensing theory, a Terfenol-D based fiber grating magnetic field sensor model is established, and the relationship between the wavelength shift of the fiber grating and the applied magnetic field strength of the Terfenol-D material is analyzed. Secondly, a static bias magnetic field is introduced to pre-magnetize the Terfenol-D material to adjust the detection sensitivity of the sensor to magnetic field changes. The theoretical analysis and experimental test results show that the magnetic field detection sensitivity of the sensor can be effectively improved to 9.38 pm/mT by the tuning of the static bias magnetic field, which is about 8.55 times compared with that of the unoptimized one. Finally, the optimized fiber grating magnetic field sensor based on Terfenol-D is applied to the magnetic leakage detection of steel plate, which not only realizes the defect localization and the quantitative characterization of the defect depth, but also shows better antimagnetic interference ability than that of the traditional Hall sensor.

Key words: magnetostrictive, Terfenol-D, fiber bragg grating, magnetic field sensors, defect detection

中图分类号:

TN253

何超江, 李鹏, 何存富, 王钰珏, 刘秀成. 基于Terfenol-D与光纤光栅的高灵敏度磁场传感器[J]. 机械工程学报, 2025, 61(8): 1-8.

HE Chaojiang, LI Peng, HE Cunfu, WANG Yujue, LIU Xiucheng. High-sensitive Magnetic Field Sensor Based on Terfenol-D and Fiber Bragg Grating[J]. Journal of Mechanical Engineering, 2025, 61(8): 1-8.

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基于Terfenol-D与光纤光栅的高灵敏度磁场传感器

High-sensitive Magnetic Field Sensor Based on Terfenol-D and Fiber Bragg Grating

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