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The widespread occurrence of limb loss and sensory system impairment is a significant concern in today's society, often resulting from accidents, aging, and health issues.In order to aid individuals with such disabilities, an innovative intelligent wheelchair system has been developed, incorporating dual control mechanisms for navigation within familiar surroundings.This system allows users to operate the wheelchair through either voice recognition or a touch screen interface.By utilizing the touch screen, users can change directions by pressing different quadrants on the screen, each programmed with specific values corresponding to different directions.Alternatively, users can simply give voice commands to control the wheelchair.The voice recognition system stores a single letter for each direction, reducing recognition time and enabling quick navigation to the desired destination.The wheelchair is equipped with DC brushless motors at the rear, controlled using PWM technology, and includes a brake mechanism for added safety.Previous research indicates that the touch screen accuracy is 50%, whereas in this new system, the accuracy for movement in all directions is an impressive 94.6%.Additionally, the voice recognition accuracy stands at 80.8%, a 30% improvement over previous studies.This innovative device facilitates automatic movement for individuals with disabilities along predefined paths within indoor environments.
Balaji et al. (2024) studied this question.