Flexible Piezoelectric Sensor for Real-Time Comprehensive Cardiovascular Monitoring
Nathan Zhang, Sun Hwa Kwon, Lin Dong
TL;DR
This paper introduces a flexible piezoelectric sensor system for real-time, wearable cardiovascular monitoring that captures multiple heart signals.
Contribution
A self-contained, flexible biosensing platform integrating a piezoelectric sensor and custom PCB for on-body signal processing.
Findings
The system captures radial, carotid, and seismocardiogram signals effectively.
Thermal annealing improved the sensor's stable and linear performance.
The PCB preserves high-impedance signals for reliable cardiovascular monitoring.
Abstract
Wearable cardiovascular monitoring requires sensitive sensors and body-conforming electronics for reliable and automatic signal processing. Here, we present a fully self-contained platform that integrates a piezoelectric nanofibrous sensor with a custom flexible printed circuit board (PCB) for on-body charge amplification and filtering. Fabricated on a polyimide substrate with an ultralow bias current amplifier, the PCB preserves high-impedance piezoelectric signals for on-body signal processing. Electromechanical tests verified stable, linear performance improved by thermal annealing. System-level evaluation showed robust operation during cardiovascular monitoring, capturing radial, carotid, and seismocardiogram signals and extracting key cardiac parameters, demonstrating its potential as a practical, comprehensive, and wearable biosensing solution.
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Taxonomy
TopicsAdvanced Sensor and Energy Harvesting Materials · Non-Invasive Vital Sign Monitoring · Mechanical and Optical Resonators