Abstract
The human sense of touch is an integral part of daily life. For tasks involving grasping and manipulation of objects, force feedback is a key requirement. Most of the systems give contact point or complete grasping force feedback; for precision grasping and other physical interactions, finger awareness and force feedback from independent fingers is essential. In this study a novel, wearable proprioceptive rehabilitation system is designed which restores the ability of identifying and distinguishing between individual fingers of a prosthetic hand or an exoskeleton in a non-invasive manner. Moreover, it provides different levels of force feedback from every finger as well, which enables the user to distinguish and control force in precision grasping activities. For testing the system accuracy, classical psychophysical methods were used on a group of 14 voluntary disabled subjects. The tests were conducted in both, ideal and real-world conditions i.e. without and with distractions and accuracies were calculated accordingly. A p-test was also conducted to observe significance between the samples of with and without distraction datasets. The system performed with an overall accuracy of 82.04% which was well above the min. performance measure of 60%. Vi-HaB is standalone system and can be mounted on any upper limb rehabilitation (prosthesis, exoskeleton) system for finger awareness and force feedback.
Highlights
The importance of haptic force feedback in rehabilitation systems has been universally accepted and acknowledged [1], [2]
This study focuses on development and testing a novel, non-invasive, wearable vibrotactile haptic feedback (Vi-HaB) system which rehabilitates a disabled’s proprioceptive sense, enabling them to identify and distinguish between individual fingers and multiple levels of force feedback from individual finger for upper limb rehabilitation systems i.e. prosthesis or exoskeletons
In this study, a wearable vibrotactile haptic feedback system is designed for proprioceptive rehabilitation in upper-limb rehabilitation systems
Summary
The importance of haptic force feedback in rehabilitation systems has been universally accepted and acknowledged [1], [2]. This study focuses on development and testing a novel, non-invasive, wearable vibrotactile haptic feedback (Vi-HaB) system which rehabilitates a disabled’s proprioceptive sense, enabling them to identify and distinguish between individual fingers and multiple levels of force feedback from individual finger for upper limb rehabilitation systems i.e. prosthesis or exoskeletons. Of fingers is not dependent on the phantom hand map is not limited to specific users It provides different levels of force feedback from every finger non-invasively, which enables the user to perform and control force in activities other than complete grasping, like typing and playing piano which do not involve the use of all fingers from the prosthetic hand or exoskeleton. It can be used for force feedback in teleoperation systems and virtual reality
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