Aim of the challenge
A truck has over-turned, spilling its cargo of drums containing toxic slime. One of the drums has split and contaminated some of the others. There are 6 clean drums (which are green) and 6 contaminated (red) drums. Your robot must deliver the clean drums to the clean zone (which is blue and on the left-hand side of the arena) and the contaminated drums to the contaminated zone (which is yellow and on the right–hand side of the arena). Your robot can push the drums across the arena or pick them up and carry them.
Time is of the essence; the task must be completed as quickly as possible to avert an Ecological Disaster!
Watch the video of Doofus showing how it should be done.
Control method
Remote control or Autonomous.
Please note: Teams in the Young Persons, Beginner and Intermediate categories may choose to use remote control. Advanced category teams must do the challenge autonomously.
Time limit
Robots will be allowed 5 minutes to correctly sort as many of the barrels as possible.
An additional 1 minute at the start of the challenge can be used for calibration.
Rules
- Robots will be placed in a starting box.
- The challenge arena is shown as a diagram below (click to embiggen). Dimensions are in mm:
- The arena has a perimeter wall which is 300mm tall. The dimensions in the diagram define the inside edge of the wall.
- The arena floor and walls are painted matt black apart from the clean and contaminated zones. The wall behind those zones bears the appropriate colour for the zone for the entire height of the wall. Decorative decals will be applied to the arena, these are only grey scale in colour.
- The barrels are curved and are 80mm high and 56mm in diameter. They weigh 46g and are 3D printed in PLA. They slide easily on the arena floor so long as they are pushed gently from a position low on the drum. Push them too hard and they may topple and start rolling around; this makes the game much more difficult! There will be 12 barrels in total. An STL file of the barrel is available here, zipped up.
- The barrels are 3D-printed in red and green. (Previously they were going to be painted, but they were white underneath and we thought that chips could occur throughout the day, so we’ve changed to 3D-printing).
- Multiple drums can be pushed/carried at once but you are not allowed to touch the drums by hand.
- Circles labelled “R” and “G” will be marked on the arena floor showing the start locations of the red and green drums which will be the same for all teams.
- Drums will be placed within a designated box which leaves a 300mm space between the walls and drums; this is to allow space for robots to manoeuvre between the drum and wall if required.
- We will attempt to provide even, diffuse, white lighting across the entire arena to assist with autonomous vision systems. However, teams should try to build vision systems which are robust under non-uniform lighting conditions.
- At the end of the allotted time, the Judge will count the number of drums successfully delivered to the appropriate zone. A drum will be deemed delivered if any part of it is touching, or positioned over, the appropriate coloured floor patch.
- If a drum is delivered but is then inadvertently pushed out of the zone, then it will no longer be “delivered” unless it is returned to the zone.
Vision System Calibration
Teams will be allowed 1 minute to calibrate within the course and then the stopwatch will be started.
Scoring
For ranking purposes, robots will be timed. Tie-breaks will be settled based on the highest number of barrels sorted in the shortest time. Points will be awarded according to rank using the Formula Scoring System. Only robots delivering all the drums correctly will be eligible for these ranking points, but of course will accumulate additional points as below.
Autonomous robots
- 80 points will be awarded for each barrel sorted correctly.
- 40 points will be deducted for each barrel sorted incorrectly.
- An additional 50 points will be awarded for correctly sorting 6 barrels.
- An additional 150 points will be awarded for correctly sorting 12 barrels.
- An additional 250 points will be awarded for attempting this challenge autonomously.
Remote-controlled robots
- 50 points will be awarded for each barrel sorted correctly.
- 25 points will be deducted for each barrel sorted incorrectly.
- An additional 50 points will be awarded for correctly sorting 6 barrels.
- An additional 150 points will be awarded for correctly sorting 12 barrels.
Penalties
There will be no penalties applied for rescuing the robot however the clock will not be stopped for rescues. You may not touch the barrels by hand at any time.
Ask Questions and Discuss
There are a number of ways you can discuss this challenge and the competition in general.