Capacitive Heart-Rate Sensing on Touch Screen Panel with Laterally Interspaced Electrodes
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ID: 266373
2020
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Abstract
It is demonstrated that the heart-rate can be sensed capacitively on a touch screen panel (TSP) together with touch signals. The existing heart-rate sensing systems measure blood pulses by tracing the amount of light reflected from blood vessels during a number of cardiac cycles. This type of sensing system requires a considerable amount of power and space to be implemented in multi-functional mobile devices such as smart phones. It is found that the variation of the effective dielectric constant of finger stemming from the difference of systolic and diastolic blood flows can be measured with laterally interspaced top electrodes of TSP. The spacing between a pair of non-adjacent top electrodes turns out to be wide enough to distinguish heart-rate signals from noises. With the aid of fast Fourier transform, the heart-rate can be extracted reliably, which matches with the one obtained by actually counting heart beats on the wrist.
| Reference Key |
kim2020sensorscapacitive
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|---|---|
| Authors | Junhyung Kim;Wonho Song;Sungchul Jung;Yuna Kim;Wonsang Park;Bonghyun You;Kibog Park;Kim, Junhyung;Song, Wonho;Jung, Sungchul;Kim, Yuna;Park, Wonsang;You, Bonghyun;Park, Kibog; |
| Journal | sensors |
| Year | 2020 |
| DOI |
10.3390/s20143986
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| URL | |
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