基于互相关改进法的高精度测量电信号效果研究  

Research on the Effect of Cross-lorrelation-Improved Method Based High Accuracy Measuring Electrical Signal

作　　者：曹堃锐 陈砚圃[1] 谭薇[1] 

机构地区：[1]西安通信学院,西安710106

出　　处：《电测与仪表》2014年第20期85-90,共6页Electrical Measurement & Instrumentation

摘　　要：为克服通过采样法测量电信号时由于噪声干扰造成的误差问题,基于传统的互相关法,提出了一种改进的互相关去噪法。该方法具有充分利用采样数据及准确估计原信号振幅的性能,能很好的恢复原信号数据,获得去噪效果;当采样时长为额定周期整数倍时,该方法还能有效抑制原信号的谐波分量,并以振幅和初相变化为代价克服原信号的频率偏差,重构出具有额定频率的正弦信号。数值模拟结果验证了文中方法的正确性和有效性,并通过分析重构出的电信号有效值误差数据,表明该方法能够满足高精度测量的要求。To avoid the error problem caused by noise interference when measuring the electrical signal based on the sampling method,an improved cross-correlation denoising method has been proposed based on the traditional cross-correlation strategy. The proposed method will take full use of the sampling data and estimate the original signal ampli-tude,so as to recover the original data and obtain beeter denosing effect. In addition,such method can control the har-monic component and overcome the frequency deviation when the sampling duration is the integral multiple of sampling period ,with will help to reconstruct a sine signal with rated frequency. At last accuracy and outstanding of the method has been proved by simulation and contrasting effective value.

关 键 词：电信号 互相关改进法 白噪声 频率偏差 谐波分量 振幅 有效值 

分 类 号：TM933[电气工程—电力电子与电力传动]