A synchronized event-cue feedback loop integrating a 3D printed wearable flexible sensor-tactor platform

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Wearable devices for the somatosensory system aim to provide feedback and stimulation to the peripheral nervous system.
• Effective targeting of peripheral mechanoreceptors requires adaptable flexible electronics due to variations in mechanoreceptor density and type.
• Existing virtual reality tools do not precisely target peripheral mechanoreceptors.

Purpose of the Study:

• To develop a sensing-actuation platform for wearable electronics that delivers responsive tactile feedback.
• To integrate custom flexible silicone-based actuators with carbon nanotube (CNT)-elastomer tactile sensors.
• To demonstrate the capability of these devices in detecting pressure variations and eliciting vibrotactile cues.

Main Methods:

• Advanced manufacturing techniques were used to create a flexible sensing-actuation platform.
• Custom flexible silicone-based actuators were integrated with CNT-elastomer tactile sensors.
• The cantilevers of the actuators were optimized to achieve a broad spectrum of driving frequencies.

Main Results:

• Three functional, synchronized event-cue feedback devices were presented: a prosthetic, a sole, and a glove.
• The devices utilized CNT sensors to detect pressure variations from weight, gait, and grip.
• The flexible tactors transmitted signals to elicit vibrotactile cues.

Conclusions:

• The developed wearable electronics hold promise for stimulating peripheral nerves.
• These devices can augment prosthetic functionality and enhance grip control.
• The technology offers potential for improving tactile sensation in individuals with limited nervous system function.