A fiber-optic current sensor with frequency-codified output for high-voltage systems
A fiber-optic current sensor with frequency-codified output for high-voltage systems
复制标题
DOI：
10.1109/lpt.2002.801593
复制
发表时间：
2002-11
影响因子：
2.6
通讯作者：
P. Pérez-Millán;L. Martínez-León;A. Díez;J. Cruz;M. Andrés
中科院分区：
文献类型：
--
作者：
P. Pérez-Millán;L. Martínez-León;A. Díez;J. Cruz;M. Andrés
作者提出了一种用于高功率系统的频率输出光纤电流传感器。该传感器利用了标准电流互感器铁磁芯的磁致伸缩，并通过缠绕在其上的一段单模光纤和马赫-曾德尔干涉仪来对其进行询问。由于电流产生的磁场而导致磁芯变形，从而产生调频输出信号。该传感器是根据光信号的频率特征获取电流，避免了其他光纤电流传感器的光功率波动、相位漂移、偏振敏感等缺点。
The authors present a frequency-output fiber-optic current sensor for high-power systems. The sensor exploits the magnetostriction of the ferromagnetic core of a standard current transformer, which is interrogated by a length of single-mode fiber coiled onto it and a Mach-Zehnder interferometer. The deformation of the core due to the magnetic field generated by the current produces a frequency-modulated output signal. The current is obtained from the frequency features of the optical signal, and so the sensor avoids certain shortcomings of other fiber optic current sensors such as light power fluctuations, phase drift, and polarization sensitivity.