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Distributed optical fiber dynamic magnetic field sensor based on magnetostriction

机译：基于磁致伸缩的分布式光纤动态磁场传感器

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摘要

A distributed optical fiber sensor is introduced which is capable of quantifying multiple magnetic fields along a 1 km sensing fiber with a spatial resolution of 1 m. The operation of the proposed sensor is based on measuring the magnetorestrictive induced strain of a nickel wire attached to an optical fiber. The strain coupled to the optical fiber was detected by measuring the strain-induced phase variation between the backscattered Rayleigh light from two segments of the sensing fiber. A magnetic field intensity resolution of 0.3 G over a bandwidth of 50-5000 Hz was demonstrated.
机译：引入了一种分布式光纤传感器，该传感器能够量化空间分辨率为1 m的1 km传感光纤上的多个磁场。所提出的传感器的操作基于测量附接到光纤的镍线的磁致伸缩感应应变。通过测量来自传感光纤两段的反向散射瑞利光之间的应变感应相位变化，可以检测耦合到光纤的应变。演示了在50-5000 Hz带宽上0.3 G的磁场强度分辨率。

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