| Abstract: |
Autonomous mobile robots are ever increasing their number
of different applications, even in ludic application or in sports. In the
last few years, several competitions of football have been organised with
lots of teams participating. This paper describes an Autonomous Mobile Robot
which plays football and it was developed at the Industrial Electronics
Engineering department of the University of Minho in Guimares, Portugal.
Each team is free to solve on his own way all the different electronics,
sensory systems, playing algorithms, etc. as far as they cope with the rules
imposed by the organisation. Instead of using several different sensors
increasing electronics complexity, it was decided to use only one major
sensor namely a vision system with the use of a colour camera. All the image
processing algorithms were developed from scratch and are hereby described.
This vision system uses an innovative approach. In order to see the whole
field, a convex mirror was placed on the top of the robot looking downwards
with the video camera looking upwards towards the mirror. This way, the
robot can see both goals, the ball and other robots, almost all the time,
as well as having a top view. |