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一种测量静态磁场的光纤传感仪
引用本文:刘岚.一种测量静态磁场的光纤传感仪[J].传感器与微系统,1995(1):28-30.
作者姓名:刘岚
作者单位:武汉工业大学
摘    要:所述的传感仪根据Mach-zehnder干涉仪原理制作.传感臂和参考臂由两条单模光纤构成,传感臂的光纤上粘合了一段磁滞伸缩材料作为传感头,一个频率为ω0的偏置磁场施加于传感头上,当被测静态场与交变的偏置场共同作用于传感头时,磁滞伸缩材料所产生的纵向应变将导致光纤中的光相位发生变化,利用相位探测装置和锁相放大器就可测出未知场的大小,本系统可探测的最小静态场为10-6(Oe/m)。

关 键 词:光纤,传感器,磁场,磁滞伸缩

A Fiber Optic Magnetometer for Detecing DC Magnetic Fields
Liu Lan.A Fiber Optic Magnetometer for Detecing DC Magnetic Fields[J].Transducer and Microsystem Technology,1995(1):28-30.
Authors:Liu Lan
Affiliation:Wuhan Uuiversity of Technology
Abstract:According to the Mach-zehnder interferometer,a fiber optic magnetometer for detecting DC magnetic fields a first optical fiber having a magnetostrictive jacket thereon which defines a sensing arm, and a second fiber defining a reference arm. An AC magnetic field of frequency ω0 and a DC field are imposed on the magnetostrictive jacket so as to cause optical path length chang in the sensing arm fiber. This induces a corresponding Phase shift in light transmitted through the sensing arm fiber. The phase detective devic and lock-in amplifier will produce a signal proportional to the DC magnetic field. The minimum detectable field is 10(-6) Oe/m.
Keywords:Fiber optic Sensor Magnetic field Magnetostrictive  
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