光纤光栅传感器中磁场测量稳定性研究  

Study on stability of magnetic-field measurement of fiber grating sensor

作　　者：王东升[1] 葛海波[2] 杜琴[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710061 [2]西安邮电大学电子工程学院,陕西西安710061

出　　处：《传感器与微系统》2014年第3期62-65,共4页Transducer and Microsystem Technologies

基　　金：陕西省自然科学基金资助项目(2011JM8038)

摘　　要：为了减小光纤光栅磁场传感器中线性双折射和入射起偏角对系统稳定性的影响,提高测量系统的准确性,提出一种减小线性双折射和起偏角大小对系统输出影响的设计方案。研究了基于法拉第效应的光纤光栅磁场传感器系统,得出系统输出电压与磁场的关系式,并通过降低线性双折射和确定入射起偏角改善了系统的输出特性。仿真表明:该方法可以有效抑制测量过程中线性双折射造成的非线性关系,从而提高磁场测量的稳定性。In order to reduce effect of linear birefringence and the incident polarizing angle on stability of system of fiber grating magnetic-field sensor and improve accuracy of measuring system,a design scheme for reducing the effect of linear birefringence and incident polarizing angle on output of system is proposed.Fiber grating magnetic- field sensor system based on Faraday effect is studied,and relation between output voltage and magnetic field is derived,improve output characteristics of system by reducing linear birefringence and confirming incident polarizing angle.Simulation results show that the method can suppress the nonlinear relationship caused by the linear birefringence thereby improve the stability of magnetic-field measurement.

关 键 词：光纤光栅 磁场 线性双折射 入射起偏角 法拉第效应 磁场传感器 

分 类 号：TP929.1[自动化与计算机技术]