Improved QRS Complex Detection in Capacitive ECG Measurements through Thick Clothing Using Capacitance Multiplier Circuit

Iori Kudo, Akinori Ueno

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Keywords: cECG, capacitance multiplier circuit (CMC), QRS complex

Abstract: In capacitive electrocardiography (cECG) measurements through thick clothing, signal attenuation in the coupling impedance owing to bulky clothes is a major challenge. This paper presents a capacitance multiplier circuit (CMC) to equivalently amplify the small capacitance of coupling to improve the detection performance of the QRS complex in cECG measurement. We acquired cECG signals using the proposed CMC from five male participants wearing 2.87 mm–thick clothing. The corresponding results reveal that the mean detection rates of sensitivity, accuracy, and positive predictive value exceed 95% by adjusting the amplification factor. Compared with a conventional measurement system without the CMC, the mean accuracy significantly increases by 57.0% (p < 0.01), and notable noise mitigation is achieved.

Track: 4. Flexible, stretchable, and imperceptible electronics for sensors and systems

NominateReviewer: Akinori Ueno < [e-mail] >

Submission Number: 57