line following robot ppt

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Information about line following robot ppt

Published on March 8, 2014

Author: suchitmoon



INTRODUCTION  The line follower is a self operating robot that detects and follows a line that is drawn on the floor. The path consists of a black line on a white surface .  It continuously corrects itself to stay on the track.  It is an automated robot which doesn't require any human help to control it.

WORKING  The IR sensor detects the light emitted by the transmitter, if the receiver receives light, the wheel of that side will keep on moving, as soon as the receiver stops receiving the light (black colour absorbs the light and thus no light is reflected so receiver cannot receive any light) the wheel of that side will stop.  For turning ,the robot stops 1 motor and runs the second to make the turn possible.  For eg:  If the robot has to turn right then the motor on right side will stop and left motor will keep on running and thus allowing the robot to turn.

APPLICATION  Industrial automated equipment carriers.  Automated cars.  Tour guides in museums and other similar applications.  Deliver the mail within the office building  Deliver medications in a hospital.

ADVANTAGES  Robot movement is automatic.  Used for long distance applications.  It is capable of taking various degrees of turns.  Cost effective  The color of the line must not be a factor as long as it is darker than the surroundings.

DISADVANTAGE  LFR can move on a fixed track or path only.  It requires power supply.  Lack of speed control makes the robot unstable at times.  Choice of line is made in the hardware abstraction and cannot be changed by software.


Line Following Algorithm  Robot direction is determined by what the robot “sees”  If line is centered in front of robot, go forward  If line is left of center, turn left  If line is right of center, turn right  If no line is detected, circle until line is found

Line Following Algorithm Straight Left Right Circle

FUTURE SCOPE  Software control of the line type (dark or light) to make automatic detection possible.  “Obstacle detecting sensors” to avoid physical obstacles and continue on the line.  Distance sensing and position logging & transmission.


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