Strain and Electromyography Dual-Mode Stretchable Sensor for Real-Time Monitoring of Joint Movement.

Area of Science:

• Materials Science
• Biomedical Engineering
• Wearable Technology

Background:

• Flexible sensors are crucial for interfacing biological tissues with machines.
• Existing systems often lack multimodal sensing capabilities for comprehensive movement analysis.

Purpose of the Study:

• To develop a dual-mode stretchable sensor system for simultaneous electromyography (EMG) and strain detection.
• To enable real-time, wireless joint movement monitoring using integrated WIFI transmission.

Main Methods:

• A multi-channel gel electrode array was used for high-fidelity EMG signal acquisition.
• A novel capacitive strain sensor utilizing stretchable micro-cracked gold film on SEBS was developed.
• The system integrates wireless WIFI for data transmission and visualization.

Main Results:

• The strain sensor achieved >80% stretchability, >4000-cycle durability, and <100 ms response time.
• Position-independent measurement accuracy was demonstrated for robust joint angle detection.
• Synchronized EMG and strain data provided comprehensive human movement quantification.

Conclusions:

• The developed system offers a generalizable framework for multimodal biosensing.
• This technology has significant potential in human motion analysis, robotics, and human-machine interaction.
• The dual-mode sensor system enhances the fidelity of wearable biosensing applications.