Stretchable Filler/Solid Rubber Piezoresistive Thread Sensor for Gesture Recognition

Area of Science:

• Materials Science
• Biomedical Engineering
• Sensor Technology

Background:

• Stretchable piezoresistive composites are crucial for wearable biomechanical sensing and human posture recognition.
• Direct and conformal attachment to the body and clothing is a key advantage.

Purpose of the Study:

• To develop a novel stretchable piezoresistive thread sensor (SPTS).
• To evaluate its performance for biomechanical sensing and gesture recognition applications.

Main Methods:

• Fabrication of SPTS using Ag plated glass microspheres (Ag@GMs)/solid rubber (SR) composite via shear dispersion and extrusion vulcanization.
• Characterization of sensor performance, including gauge factor, linearity, hysteresis, and long-term stability.
• Integration of SPTS into an intelligent gesture recognition system.

Main Results:

• The SPTS exhibits high gauge factors (7.8-11.1) over a 0-50% stretching range with approximate linear resistance change.
• Low hysteresis (2.6%) and excellent stability over 1000 cycles at 50% strain were demonstrated.
• Successful application in posture recognition, facial movement monitoring, and an intelligent gesture recognition system translating signals to text and voice.

Conclusions:

• The developed SPTS shows significant potential for advanced biomechanical sensing and human-computer interaction.
• This work presents a new strategy for real-time, effective communication through intelligent gesture recognition systems.