Voice Recognition Based Wheel Chair Control System for Physical Challenged People

Abstract

The main objective of this work is recommended to control a wheel chair by voice of the person who use the wheel chair for their needs. The system is designed to facilitate the movement of elder and handicapped people those who are not able to move well. The proposed system also includes a therapy unit that will gives an assistance for limbs of the user which can prevent numbness due to continuous rest. An obstacle sensor is included in the system to detect the presence of obstacles in the way of movement. The goal of this system is to help the disabled ones to move independently and it can eliminate enslavement.

Existing System

The existing system consists of a joystick which can be used to control the movement of wheel chair. According to the output came from joystick, microcontroller give instructions to the motor and move wheel chair to the desired location. As technology has developed, joystick controlled wheel chair are widely available all around the world. But for paralyzed, physically disabled or handicapped persons, having issues related to fingers or hands, it needs hand movement for controlling joystick. Moreover, old aged people have poor wrist movement face problems to use the joystick. So an alternative is necessary to overcome the necessity of joystick in controlling movement of wheel chair.

Proposed System

As voice is the most common form of communication, proposed design is developed to operate the wheel chair using the command of the user. But in hectic areas voice cannot be recognized easily. Therefore, the option for joystick were also included in the system as an optional one. So the system can be used as a multipurpose device. The system also includes a servomotor and vibrator for assisting the upper and lower limbs of the user those who are suffering from numbness due to continuous rest. A switch is provided for enabling therapy unit. It includes a controlling unit and therapy unit.

Architecture

BLOCK DIAGRAM