该算法将频率为128Hz的采样数据通过四阶傅立叶变换，消除干扰信息后还原真实波形，为信号采集后的数字滤波提供一种新的思路。-The algorithm will restore the true waveform frequency is 128Hz sampling data by the four-order Fourier transform, to eliminate the interference information, the signal acquisition after digital filtering to provide a new way of thinking.