21-09-2012, 11:08 AM
Path Planning For Blind Person Using Ultrasonic
Path Planning.doc (Size: 25 KB / Downloads: 53)
Abstract:
A robot can be defined as a programmable, self-controlled device consisting of electronic, electrical, or mechanical units. Line follower is a machine that can follow a path. The path can be visible like a black line on a white surface (or vice-versa) or it can be invisible like a magnetic field.
Sensing a line and maneuvering the robot to stay on course, while constantly correcting wrong moves using feedback mechanism forms a simple yet effective closed loop system. As a programmer you get an opportunity to ‘teach’ the robot how to follow the line thus giving it a human-like property of responding to stimuli.
The system consists of microcontroller Ultrasonic sensors switches (keys) DC motors and a DC motor driver, the microcontroller is interfaced with all these peripherals. When the power is switched on, the microcontroller enables all its peripherals and starts its functionality. We can move the robot forward direction by default. When the robot finds any obstrucles on its way the microcontroller stops the DC motors (means the robot comes to stable position) and it gives a beep sound for alerting the blind people. Based on that sound the blind people can identifies the obstrucles change their direction.