Capturing Electrocardiogram Signals from Chairs by Multiple Capacitively Coupled Unipolar Electrodes

Sensors
Zhongjie HouBin Yang

Abstract

A prototype of an electrocardiogram (ECG) signal acquisition system with multiple unipolar capacitively coupled electrodes is designed and experimentally tested. Capacitively coupled electrodes made of a standard printed circuit board (PCB) are used as the sensing electrodes. Different from the conventional measurement schematics, where one single lead ECG signal is acquired from a pair of sensing electrodes, the sensing electrodes in our approaches operate in a unipolar mode, i.e., the biopotential signals picked up by each sensing electrodes are amplified and sampled separately. Four unipolar electrodes are mounted on the backrest of a regular chair and therefore four channel of signals containing ECG information are sampled and processed. It is found that the qualities of ECG signal contained in the four channel are different from each other. In order to pick up the ECG signal, an index for quality evaluation, as well as for aggregation of multiple signals, is proposed based on phase space reconstruction. Experimental tests are carried out while subjects sitting on the chair and clothed. The results indicate that the ECG signals can be reliably obtained in such a unipolar way.

References

Jul 12, 2001·IEEE Engineering in Medicine and Biology Magazine : the Quarterly Magazine of the Engineering in Medicine & Biology Society·G B Moody, R G Mark
Jun 4, 2004·Journal of Cardiovascular Electrophysiology·Koichi MizumakiHiroshi Inoue
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Feb 27, 2013·Medicine and Science in Sports and Exercise·Luz M León-MuñozFernando Rodríguez-Artalejo
Oct 19, 2013·Physiological Measurement·N MezianeA J Nimunkar
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Oct 27, 2015·BioMed Research International·Gaetano D Gargiulo
Jan 24, 2017·IEEE Journal of Biomedical and Health Informatics·Zunyi TangShigehiko Kanaya
Jun 9, 2018·Sensors·Jose-Luis Bayo-MontonVicente Traver

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Methods Mentioned

BETA
PCA

Software Mentioned

MATLAB
CapFloor

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