摘要
介绍了一种滤除工频干扰的方法，它通过硬件电路实现了对工频频率的自动跟踪，从而解决了因工频的频率偏移而不易滤除的问题．
The environmental noise,especially the 50Hz interference is the troublesome problem when the week biological signals are analysed.Because of the frequence drift,the 50Hz interference is hard to eliminate by the normal filter.A method to remove the interference is introduced.The filtering frequence follows the frequence of the noise by changing the sampling rate automatically.Different to the digital adaptive filter,this way uses simple hardware to achieve the best result.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
1997年第4期43-45,共3页
Journal of Nanjing Normal University(Natural Science Edition)
关键词
传感器
工频干扰
频谱
自动跟踪
滤波器
sensor,50Hz interference,filter,frequency spectrum,auto tracked
