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A Flexible Triboelectric-Based Sensor for Seismocardiography Monitoring.
Changke Wang1, Yingjie He1, Haojie Peng1
1College of Physics and Optoelectronic Engineering, Chongqing Normal University, Chongqing 401331, China.
Biosensors
|May 26, 2026
Summary
A new flexible triboelectric pressure sensor enables continuous seismocardiography (SCG) monitoring. This wearable device captures subtle heart vibrations for daily cardiovascular health assessment, overcoming limitations of rigid sensors.
Area of Science:
- Biomedical Engineering
- Wearable Health Technology
- Cardiovascular Monitoring
Background:
- Seismocardiography (SCG) offers noninvasive cardiovascular monitoring by detecting chest vibrations from heart activity.
- Current SCG systems often use rigid accelerometers, limiting comfort and continuous use in daily life.
- SCG signals are low-frequency, low-amplitude, and sensitive to sensor-skin contact, posing challenges for flexible sensors.
Purpose of the Study:
- To develop a flexible pressure sensor for high-fidelity seismocardiography (SCG) acquisition.
- To enable comfortable and continuous SCG monitoring in everyday settings.
- To address the limitations of existing rigid SCG sensors.
Main Methods:
- A flexible triboelectric pressure sensor with a single-electrode contact-separation structure was designed.
- The sensor utilizes a negatively charged polymer and nickel foil electrode.
- Performance was evaluated for sensitivity, frequency response, and long-term stability.
Main Results:
- The sensor demonstrated high sensitivity (3.76 V/N) in the 0-200 mN range.
- It exhibited good frequency response (0.5-25 Hz) and stability over 5300 cycles.
- Successful continuous SCG monitoring was achieved when attached to the sternum.
Conclusions:
- A novel flexible triboelectric sensor provides a feasible solution for wearable SCG.
- This technology supports high-fidelity, comfortable, and continuous cardiac monitoring for home-based health.
- It advances the application of flexible sensors in daily life health surveillance.