Ltd.;Maisonburg (Shenzhen) Technology Development Co.
发明人:
申请号：
EP17924386.0
公开号：
EP3679860A1
申请日:
2017.09.08
申请国别(地区):
EP
年份:
2020
代理人:
摘要：
A control method and system for filtering out powerline interference is disclosed. The control method includes the following steps. First, ECG signals are pre-segmented and rectified； then the sinusoidal frequency, amplitude, and phase of the rectified segmented signals are extracted. These estimated sinusoidal parameters from each recorded channel are weighted by their individual signal to noise ratios before being averaged to achieve the optimal powerline frequency, amplitude, and phase. Based on these optimal sinusoidal parameters, the individual sinusoidal waveform is reconstructed and then is subtracted from the corresponding ECG segment, in order to obtain the clean ECG signals. This method of filtering out the powerline interference through removal from recorded signals enables accurate measurement without any ringing effect that could lead to signal distortion issues. Thus this application solves the ringing problem encountered by traditional notch filter techniques when signal amplitude suddenly changes in a measurement.
