摘要
介绍了一种新型的利用法拉第磁光效应原理的光纤电流、磁场传感技术。详细地分析了利用光纤测量电流、磁场的基本原理，推导了法拉第磁光效应的基本关系式。并利用法拉策磁光效应仅与磁场的方向有关这一特性，采用镀膜技术，使光线在传感头中多次反射以增加光束通过磁光材料的有效长度，而设计出高灵敏度光纤电流、磁场传感器。该传感器具有灵敏度高、体积小、重量轻、抗电磁干扰以及安装测试方便等特点。
The new technologies for the measurement of magnetic field and current using optical fiber sensor were described in every detail and particularly in this paper. The basic theory of the sensor of magnetic field and current was called Faraday magneticoptic effect.According to the characteristic of Faraday magnetic-optic effect,when a plane polarized lighttraverses through some transparent material in a magnetic field along the direction of magnetic induction ,the plane of polarization would rotate a certain angle and this angle relatesonly to the direction of magnetic induction,An electroplating technology was put to use,which made the input light reflection repeatedly in the sensor to increase the effective lengthof the light traversed through the magnetic-optic material,and then the high accuracy opticalfiber sensor of magnetic field and current was made. This sensor has its own distinguishingfeatures of high sensitivity,small bulk,low weight, and resistant to electromagnetic interference,The experiment results tallied with theory were also shown in this paper.
出处
《铁道学报》
EI
CSCD
北大核心
1995年第4期56-62,共7页
Journal of the China Railway Society
基金
铁道部科学基金
关键词
电流
磁场
法拉第磁光效应
光纤传感器
current
magnetic field
Faraday magnetic-optic effect
optical fiber sensor
