Abstract:
In this thesis, the innovative and low-cost self-assistive design of wheelchair for
the intended users is implemented to facilitate the control of voice commands. Moreover,
the implementation of voice-controlled wheelchair focuses on Arduino, Voice recognition
module and Motors in construction. The speed controller also performs by changing the
average voltage sent to the motor by switching the motor supply on and off very quickly
using Pulse Width Modulation (PWM) technique. The voice recognition module operates
on user’s voice commands and the corresponding coded data stored in the memory of the
Arduino Microcontroller. Arduino Microcontroller controls all the direction accordingly.
The voice-controlled wheelchair can detect any obstacles in the way of wheelchair
with the use of ultrasonic sensor. It provides more independent and easy access for the
wheelchair users who cannot control their movements especially by hands. It is designed
for the users to perform certain tasks using their voices. Besides, the user can easily speak
their commands to the microphone making more user-friendly and independent. The
movements of the voice-controlled wheelchair in environmental noise area and silent area
are experimented in this thesis. According to the experimental results, the percentage of
the voice commands accuracy in silent area is better than environmental noise area
because the voice module can catch more commands in silent area.
