电测与仪表2016，Vol.53Issue(21)：16-21,6.
基于序贯卡尔曼滤波的 OCT 信号处理方法研究
Research of signal processing of OCT based on sequential Kalman filter
摘要
Abstract
When Optical current transformer ( OCT) is used to measure small current , the internal noise signal meas-ured is often greater than the photoelectric signal .The measured reading can ’ t accurately reflect the true value of the current .Effectively filtering out the noise and improving the signal to noise ratio is the crux of OCT signal processing . This paper introduces the basic principle and the signal to noise characteristics of the optical current transformer based on Faraday magneto-optic effect.In the case of the measured current with AC and DC signals , we establish the appro-priate filter state-space model , and use sequential Kalman filter method on LabVIEW simulation .The results show that the sequential Kalman filter algorithm can effectively perform signal noise separation in real-time to the measuring current , meanwhile , it can also accurately separate the AC and DC components , which improves the output signal to noise ratio and measurement accuracy .关键词
卡尔曼滤波/光学电流互感器/信噪比/法拉第效应/序贯卡尔曼滤波Key words
Kalman filter/optical current transformer/SNR/Faraday effect/sequential Kalman filter分类
信息技术与安全科学引用本文复制引用
李岩松,李霞,欧阳进,严宇恒..基于序贯卡尔曼滤波的 OCT 信号处理方法研究[J].电测与仪表,2016,53(21):16-21,6.基金项目
国家自然科学基金资助项目 （）
