【摘要】 以琼斯矩阵为数学工具 ,利用理论分析、计算机仿真和实验研究的方法 ,考察了偏振片的消光比和预偏角误差对光学电流传感器输出特性的影响 研究结果表明 ,上述偏振片参量均可在光学电流传感器的输出中引入直流分量 ,并使尺度因子发生一定的改变 当最终输出信号用交流电表度量时 ,输出信号中引入的直流分量可被交流电表中自带的隔直电容滤除 ,尺度因子的改变可用后续信号处理电路中的放大单元矫正 本研究结果可为光学电流传感器的设计人员提供有用的参考更多还原

【Abstract】 Employing Jones′ Matrix as a mathematical tool, the effects of the extinction ratio and the bias angle error of the polarizer upon the output characteristics of an optical current sensing system are theoretically analyzed and experimentally investigated. The results show that a DC component in the output signal can be induced by both of the two parameters investigated here, and the scale factor of the output signal can also be changed slightly. The induced DC component can be filtered off by the build-in capacitor of the AC voltage meter, and the change of the scale factor can be compensated by the amplifier in the signal processing unit of the system. These results would be useful results and helpful for the optical current sensor designers.更多还原