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KangHwi Lee

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Proceedings Article | 28 August 2018 Paper

Measuring heart-rate using wireless power charging receiver coil

KangHwi Lee, Seong-Su Lee, Sang-Min Kim, Kyeong-Seop Kim, Jeong-Whan Lee

Proceedings Volume 10806, 108066N (2018) https://doi.org/10.1117/12.2503044

KEYWORDS: Magnetism, Heart, Receivers, Oscillators, Electrocardiography, Cell phones, Tissues, Demodulation, Mobile communications, Mobile devices

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In this paper, we propose a method of measuring mechanical activity of the heart using flat coil via wireless power charging receiver coil in a mobile communication devices such as mobile phone. The basic principle of the proposed method is based on the variation of magnetic inductance of coil antenna near biological tissues caused by the eddy current according to the Faraday’s law of magnetic induction. In order to recover the movement of ventricular muscle of the heart, FM demodulation scheme was applied. The correlation between the cardiac cycle and the measured heart activities was compared with standard ECG lead II signals. As a result, the period of the measured signals almost close to the intrinsic period of R-R intervals of the heart. The proposed method shows the possibility of using wireless power charging receiver coil embedded in the personal communication devices such as mobile phone and tablet device as a new heart-rate sensor.

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