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Sensors 2017, 17(11), 2474; https://doi.org/10.3390/s17112474

An Electronic System for the Contactless Reading of ECG Signals

1
Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy
2
Unit of Electronics for Sensor Systems, Department of Engineering Campus Bio-Medico University of Rome, 00128 Rome, Italy
3
ALTEC S.p.A., Aerospace Logistics and Technology Engineering Company, 10146 Torino, Italy
4
Department of Electronic Engineering, University of Rome Tor Vergata, 00133 Rome, Italy
*
Author to whom correspondence should be addressed.
Received: 25 September 2017 / Revised: 23 October 2017 / Accepted: 27 October 2017 / Published: 28 October 2017
(This article belongs to the Special Issue Sensors for Health Monitoring and Disease Diagnosis)
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Abstract

The aim of this work is the development of a contactless capacitive sensory system for the detection of (Electrocardiographic) ECG-like signals. The acquisition approach is based on a capacitive coupling with the patient body performed by electrodes integrated in a front-end circuit. The proposed system is able to detect changes in the electric charge related to the heart activity. Due to the target signal weakness and to the presence of other undesired signals, suitable amplification stages and analogue filters are required. Simulated results allowed us to evaluate the effectiveness of the approach, whereas experimental measurements, recorded without contact to the skin, have validated the practical effectiveness of the proposed architecture. The system operates with a supply voltage of ±9 V with an overall power consumption of about 10 mW. The analogue output of the electronic interface is connected to an ATmega328 microcontroller implementing the A/D conversion and the data acquisition. The collected data can be displayed on any multimedia support for real-time tracking applications. View Full-Text
Keywords: capacitive sensors; ECG; contactless; biomedical electronics; wearable capacitive sensors; ECG; contactless; biomedical electronics; wearable
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Parente, F.R.; Santonico, M.; Zompanti, A.; Benassai, M.; Ferri, G.; D’Amico, A.; Pennazza, G. An Electronic System for the Contactless Reading of ECG Signals. Sensors 2017, 17, 2474.

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