Abstract
In this study, we develop an effective non-contact technique for measuring a human electrocardiograph. The electrocardiograph is obtained by time-derivative of the electrostatic induction current generated at an electrode placed a few centimeters away from the subject's chest. We propose a detection principle for the electrocardiograph by considering the occurrence of the electrostatic induction current generated by variations in the capacitance resulting from the electric charge on the body surface. Furthermore, we compare waveforms of the electrocardiograph obtained using our proposed electrostatic induction technique with those simultaneously obtained using conventional electrocardiography (ECG). The waveforms obtained by these two techniques have the same cycle; moreover, the waveforms of the conventional ECG signal and the time-derivative of the electrostatic induction current are considerably similar. This confirms that we can detect an electrocardiograph under non-contact conditions.
