Capacitive Biopotential Measurement for Electrophysiological Signal Acquisition: A Review

A conventional clinical biopotential measurement system requires the use of wet electrodes that are in contact with skin using conductive gel. Those systems can acquire high-quality signals but may not be feasible for a long-term purpose due to the skin irritation and allergic contact dermatitis. Th...

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Bibliographic Details
Published in:IEEE sensors journal 2016-05, Vol.16 (9), p.2832-2853
Main Authors: Sun, Ye, Yu, Xiong Bill
Format: Article
Language:English
Subjects:
Allergies
capacitive electrode
Dermatitis
ECG
EEG
Electrocardiography
Electrodes
Impedance
Monitoring
non-contact
Physiological measurement
review
Sensors
Systems architecture
Wireless communication
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Summary:A conventional clinical biopotential measurement system requires the use of wet electrodes that are in contact with skin using conductive gel. Those systems can acquire high-quality signals but may not be feasible for a long-term purpose due to the skin irritation and allergic contact dermatitis. The emerging of human-centered monitoring calls for alternative solutions. Recent technological advances enable capacitive measurement of electrophysiological measurement, which can acquire signals through cloth or even with an air gap; however, difficulties still exist. This paper systemically reviews the recent progress in capacitive measurement from electrode design, analog front end to high-level system architecture, aiming to provide comprehensive and practical instructions for entire system design. The current development serves as the solid fundamental, raising new solutions for future improvement. In addition, the challenges and the strategies are highlighted in order to demonstrate a technical guide. Some perspectives based on our experience are also discussed hoping to inspire new idea and technique in this area.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2016.2519392