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HEAD MOTION CONTROLLED POWER WHEEL CHAIR FOR PHYSICALLY DISABLED PERSONS


   A person whose spinal cord is injured or whose legs are paralyzed cannot move on his own without the assistance of other person. These kinds of people prefer to move their body under their own command. This is possible by using power wheel chairs which can be controlled automatically.
        Power wheel chairs can be controlled using different mechanisms. Earlier, the systems used, just control the movement of the wheel chair automatically by using the keypad alone. It does not detect the object opposite to it and should be operated using hands. The second mechanism involves controlling the wheelchair with a controller that lies in the mouth. This is very difficult for the user while talking and eating. Third mechanism the person should blow or suck air through tubes placed in his mouth. But all these mechanisms are expensive and complex for the patient to perform. These are the drawbacks of the existing system.
          The proposed system rectifies the above mentioned difficulties. It operates just by tilting the head.  The head motion could be left, right, forward, and backward or stopped. The accelerometer implanted on the head provides different signals based on the motion of the head. These signals are processed by the microcontroller and the motor is operated based on the microcontroller outputs. This system can also detect obstacles using obstacle sensor and can avoid motion when obstacles are encountered.  In order to activate this device a voice based control is placed along with motion control system. The start and stop voice commands processed by the voice based control system and according to those commands these the motion control will activates or deactivates.
   *This project mainly consists of accelerometer, ADC, microcontroller, motor driver circuits, motor, power supply units and obstacle sensors. 


BLOCK DIAGRAM:

Block diagram

Demo video:

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