摘要
为了更有效的提高光纤电流互感器FOCT(Fiber-Optical Current Transformer)的信噪比,在分析FOCT输出信号特性的基础上,结合变步长自适应算法和小波变换理论,提出一种针对处理FOCT输出信号的改进多尺度域变步长自适应滤波算法,并设计了一种基于Active X技术的变步长自适应滤波系统,通过该系统将改进算法与现有的变步长自适应算法进行了对比,结果表明此算法的收敛速度和稳态精度都得到了很大的改善。然后将此算法在FOCT中进行了应用测试,测试结果反映了该算法能有效提高FOCT的检测信噪比和抗噪声干扰能力。
In order to more effectively improve the signal noise ratio（ SNR） of fiber optical current transformer（ FOCT,based on the analysis of FOCT output signal characteristics,combined with variable step size adaptive algorithm and wavelet transform theory,a modified multi-scale domain variable step size adaptive algorithm for processing the output signal of FOCT is proposed. Furthermore,a variable step size adaptive filtering system based on Active X technology is build up. Based on the filtering system,the proposed algorithm with the existing variable step size adaptive algorithms is compared,which shows that the convergence speed,steady-state accuracy of the proposed algorithm has been greatly improved. Then,the application test of the proposed algorithm is carried out in FOCT,which explores that the proposed algorithm can effectively improve detection SNR and noise immunity of FOCT.
作者
刘宪爽
孙学勇
肖文波
吴华明
朱俊
LIU Xianshuang;SUN Xueyong;XIAO Wenbo;WU Huaming;ZHU Jun(Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, School of Measuring and Optical Engineering, Nanchang Hangkong University, Nanchang 330063, China;Jiangxi Electric Power Design Institute, Nanchang 330006, China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2018年第1期84-89,共6页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(11264031)
江西省自然科学基金项目(20151BAB207054
20114BAB201019)
江西省青年科学基金重大项目(20143ACB21011)
南昌航空大学博士启动基金项目(EA201008232)
关键词
光纤电流互感器
提高信噪比
多尺度域
变步长自适应算法
ACTIVEX
fiber optical current transformer
improve SNR
Multi-scale domain
Variable step adaptive filtering algorithm
ActiveX
