摘要
针对带变螺距段传感光纤的全光纤电流传感器,提出两种抗干扰结构:基本结构,即将变螺距段与传感光纤一起成束并将反射镜置于变螺距段中点位置;"8"字型结构,将变螺距段绕成"8"字型。分析两种结构的抗干扰原理,实验检验电流导体在传感光纤环内、外不同位置时传感器读数的差异。实验结果表明,两种结构均可抗0.5m以上的1000A级别的外界电流干扰,但前者仅适用于电流导体与传感光纤环相对位置固定不变的应用场合,后者可适用于诸多电流导体与传感光纤环相对位置不固定的应用场合。在不同的应用场合下两种结构的抗干扰性能均具有实用性。
Two anti-interference structures of sensing fibers with variable pitch parts in fiber optic current sensors are proposed.One is fundamental structure,where the variable pitch part is bunched with the sensor fiber and the reflector is placed in the midpoint of the variable pitch part.The other is ＂ 8＂-shape anti-interference structure,where the variable pitch part is wound into an ＂8＂ shape.The anti-interference principles of the two structures are analyzed.The differences of sensor readings are tested when the current conductor is at different points inside and outside the sensor fiber coil.The experimental results show that the external 1000 A level current disturbance can be resisted away from 0.5 mfor both structures.However,the former only is applied to the applications where the relative positions of the current conductor and the sensor fiber coil are unchanged,while the latter can be applied to the many applications where the relative positions of the current conductor and the sensor fiber coil are not fixed.The anti-interference performances of both structures under different applications are practicable.
作者
周东平
董毅
Zhou Dongping;Dong Yi(Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2017年第10期68-73,共6页
Acta Optica Sinica
关键词
光纤光学
传感器
电流传感光纤
抗干扰
磁光效应
偏振转换
fiber optics
sensors
current sensing fiber
anti-interference
magneto-optical effect
polarizationtransformation
