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Temperature compensated magnetostriction based fiber Bragg grating current sensor.

机译：基于温度补偿的磁致伸缩光纤布拉格光栅电流传感器。

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摘要

A compact and inexpensive optical fiber sensor for the measurement of DC and AC currents is developed. The sensor consists of a fiber Bragg grating (FBG) bonded on two end-to-end joined pieces of metal alloys, one metal alloy being Terfenol-D and the other MONEL 400. Terfenol D has huge magnetostriction, so when a magnetic field is applied stress is created in it and it expands. This property of Terfenol is used as a transducer to convert electrical measurand to mechanical.;A magnetic field applied along the two alloy bars will make the reflection spectrum of the Bragg grating split into two. The distance between the peaks of the reflection spectrum and the total intensity of light reflected back from the grating is directly proportional to the magnetic field applied along the alloys. The resultant split in the spectra can be measured with a simple technique using a single photo-detector. On the other hand, as Terfenol D and MONEL 400 have almost identical thermal expansion coefficients, a change in temperature does not cause the reflected spectra of the grating to move apart and, therefore, does not affect the magnetic field measurement. So the measurements are not affected by temperature.
机译：开发了用于测量DC和AC电流的紧凑且廉价的光纤传感器。该传感器由一个光纤布拉格光栅（FBG）粘合在两个端对端金属合金连接件上，一种金属合金是Terfenol-D，另一种是MONEL400。TerfenolD具有巨大的磁致伸缩性，因此当磁场为施加的压力会在其中产生并扩展。 Terfenol的这一特性用作将电子量转换为机械量的换能器。沿两个合金棒施加的磁场会使布拉格光栅的反射光谱分成两部分。反射光谱的峰值与从光栅反射回来的光的总强度之间的距离与沿合金施加的磁场成正比。可以使用简单的技术使用单个光电检测器来测量光谱中所得的分裂。另一方面，由于Terfenol D和MONEL 400具有几乎相同的热膨胀系数，温度的变化不会使光栅的反射光谱分开，因此不会影响磁场的测量。因此，测量不受温度的影响。

著录项

  • 作者

    Kancheti, Ramesh Babu.;

  • 作者单位

    University of Nevada, Reno.;

  • 授予单位 University of Nevada, Reno.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.S.
  • 年度 2005
  • 页码 62 p.
  • 总页数 62
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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