基于微纳光纤Sagnac环结构的光学电流传感器的响应特性研究  

Research on Response Characteristics of Optical Current Sensor Based on Microfiber Sagnac Loop Structure

作　　者：吕方兴 李飞 LYU Fang-xing;LI Fei(School of Electronic Engineering,Xi an Shiyou University,Xi an 710065,China;Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells,Xi an 710065,China)

机构地区：[1]西安石油大学电子工程学院,陕西西安710065 [2]陕西省油气井测控技术重点实验室,陕西西安710065

出　　处：《仪表技术与传感器》2022年第2期11-15,46,共6页Instrument Technique and Sensor

基　　金：国家自然科学基金企业创新发展联合基金重点项目(U20B2029);国家自然科学基金面上项目(52174005);陕西省重点研发计划项目(2021KW-33);陕西省教育厅项目(20JS125,20JK0478);陕西省高等教育教学改革研究重点项目(19BZ057)。

摘　　要：磁流体具有固体物质磁性及液体流动性的特性,且无本征矫顽力,无剩磁,磁场响应速度快,灵敏度高,将微纳光纤Sagnac环特殊的光传输性能与磁流体独特的磁光特性相结合,提出了一种基于磁流体包覆微纳光纤Sagnac环的全光纤电流传感器。理论推导了传感器的电流传感机理,设计了传感器的封装方法,并对传感器的温度特性和传感特性进行了实验研究。实验结果表明,所提出的电流传感器温度响应的灵敏度约为3 pm/℃,电流响应的灵敏度为0.00218 V/A,电流响应的线性相关系数为0.9979。相比于传统的光纤电流传感器,它具有制作工艺简单、体积小、温度稳定性高、传输损耗低、易与光纤器件耦合的技术优势。Magnetic fluid has the properties of magnetism of solid matter and fluidity of liquid,and has no intrinsic coercive force,no remanence,fast response to magnetic field and high sensitivity.A optical current sensor was achieved based on magnetic-fluid coated microfiber Sagnac loop by the combination of the special optical transmission properties of microfiber Sagnac loop and the unique magnetic and optical properties of magnetic fluid.The mechanism of current sensing was theoretically deduced,the packaging method of the sensor was designed,and the temperature characteristics and sensing characteristics of the sensor were experimentally studied.The experimental results show that the sensitivity of temperature response is about 3 pm/℃,the sensitivity of current response is 0.00218 V/A,the linear correlation coefficient of current response is 0.9979.Compared with the traditional optical fiber current sensor,it has the advantages of simple fabrication process,small size,high temperature stability,low transmission loss and easy coupling with optical fiber devices.

关 键 词：光纤传感器 电流检测 光学电流传感 微纳光纤 SAGNAC环 磁流体 

分 类 号：O439[机械工程—光学工程]