A visual-tactile synchronized stimulation ring system for sensory rehabilitation integrating triboelectric sensing and pneumatic feedback

Abstract

Stroke stands as a leading cause of disability, often resulting in sensory and motor impairments, particularly in upper limbs. Sensory rehabilitation is vital for functional recovery but is hindered by its reliance on healthcare professionals and the prioritization of motor recovery over sensory restoration. This study introduces a Triboelectric Sensor and Pressure Feedback Ring (TSPF-Ring) as a solution to bridge this gap by amalgamating triboelectric sensing and pneumatic feedback into a wearable device. The sensitive tactile sensor is capable of recognizing multi-dimensional changes such as pressure, proximity and texture, converting these into visual stimuli with a classification accuracy exceeding 99 %. Meanwhile, the pneumatic actuator provides adjustable tactile feedback within a 0–12 N range. A visual-tactile synchronized rehabilitation training utilizing the TSPF-Ring system was implemented to effectively enhance activation in the patient's sensorimotor cortex, as validated by electroencephalogram experiments. The results indicate that the TSPF-Ring holds promise in improving hand sensory function in stroke patients by promoting neural remodeling through synchronized visual-tactile stimulation, offering a novel wearable device solution for sensory rehabilitation.