摘要
针对心电信号微弱和非平稳的特点,采用Ag/AgCl表面心电电极拾取心电信号,设计了心电信号预处理电路,并在LABVIEW环境下开发了心电信号小波滤波与心电波群检测应用程序;在LabVIEW程序设计过程中采用正交小波变换去除心电的基线漂移,再用非抽样小波变换去除心电信号中的噪声,最后用多尺度小波变换检测心电信号中的心电波群点位;经过实验表明,系统不仅能够有效的采集心电信号,消除信号中的基线漂移和噪声,并且还能找到心电倌号中重要的点位。
For the weak and non--stationary characteristics of ECG signal, the Ag/AgC1 surface ECG electrodes is used to collect ECG signal, and design a ECG signal conditioning circuit. In the LabVIEW environment, the ECG wavelet filter and detection of ECG signal wave group is designed. In LabVIEW program design processing, the orthogonal wavelet transform is used to remove ECG baseline drift. Then the undecimated wavelet transform is used to remove the noise in ECG signals. At last, the multi--scale wavelet transform is used to detect ECG signal wave group points. Experiments have proved that this system not only can collect ECG signal effectively and eliminate the baseline drift and noise in the signal, but also detect the important points of ECG.
出处
《计算机测量与控制》
北大核心
2014年第3期854-856,共3页
Computer Measurement &Control
基金
国家自然科学基金(71173248)
