ISSEA STEM 2018
BottleSumo Robotic Competition
Lego Mindstorms EV3 or NXT Invitational
(Game idea and rules adopted from Robofest 2017)
The objective of BottleSumo is for an autonomous robot to either be the first robot to find and intentionally* push a two-liter bottle (filled with 1 liter of water) off the table OR be the last robot remaining on the table. The bottle will be placed at a location that is the same distance away from each robot. A robot is considered off the table when any part of it is touching the floor.
Each robot must be fully autonomous. No human control, signal, or remote computer control (tele-operation) is allowed.
(*) Intentionally pushing the bottle off the table is defined as “the robot pushes the bottle off the table with any side of the robot that has a sensor, while neither the robot nor the bottle is in contact with the second robot.” See the figure to the right. Robot A is not in contact with B or bottle.
Unintentionally pushing the bottle off the table is defined as “when the bottle falls off the table while both robots are in contact with each other [see (a) and (b) below], or when a robot pushes the bottle off the table with a side that does not have a sensor, as in the case when a robot is spinning [see (c) below], for example.”
As shown in figure (d) above, suppose B pushed the bottle off the table. It is an unintentional (not a clean) push, since the bottle was touched by robot A.
A robot must wait 5 seconds after the game is started during which a judge will place a bottle on the table approximately equidistant from each robot.
Teams must bring a fully-constructed robot to the competition with a label clearly indicating their team number and the “front” of their robot. Teams will need to bring laptop computers to modify their programs to solve the unknown starting task as well as to adjust their programs for the lighting conditions, floor color, and table color, etc. that are unknown until the competition day. The following table shows details about robot specifications.
Maximum Robot Weight
Lego NXT or EV3
Maximum robot width, length, and height
Must fit in 25x25x25cm box. Robots may *NOT* expand their dimensions during the game.
Number of robot bricks(brains) per robot
Number of sensors
At least one sensor that can detect dark/light contrast on the same plane AND at least one sensor that can detect objects
LEGO NXT or LEGO EV3
Number of motors
Any. You may use tape, glue, rubber bands, etc. (However, you cannot glue/tape the robot to the sumo ring floor.) Vacuum or sticky tires are not allowed.
The tables that are used for the competition is about 61 cm x 120 cm plastic folding table. The four corners of the table are rounded. The surface is light in color, for example, almond, tan, or gray. The table is placed on a dark colored floor with the legs folded under. The table can be raised up with rolls of packing tape for example, (we recommend a stack of three) as shown in the figure. The exact size, color, brightness, and edge shape are unknown until the day of the competition.
A two-liter bottle is covered with A4 size (21cm x 29.7 cm) white paper. Red electrical tape or color paper is used to create a red stripe as shown in the figure. The exact color of the red tape is unknown until the competition day.