Let's Make Robots!

Mini Sumo

Pushes other robots out of a ring, confuses ultrasonic sensors

**I placed first!!  Some of the competition had ultrasonic sensors with low enough thresholds that they were still able to see my foam-covered robot, but the upward spinning defense wheels proved very effective.  Later into the compeition I added white tape to my blue wedges, in an attempt to trigger the line sensors of my opponents.   

This is my first programmed mini sumo.  I've just finished the body, and my friend who has an Arduino will be doing the programming.  I wanted to do something different with this robot, so I've implemented a few of my ideas that may give it an edge over the competition.  First, the robot is symmetrical, there is no front or back.  Considering that you are just as likely to have to start facing the opponent as facing away, I am surprised this is not more common.  Second, both the pushing sides have a wheel that rotates upwards.  These are intended to lift apposing robots up, helping to push them out of the ring.  Because the National Robotics Challenge rules prevent robots from expanding, wedges that flip down are not that common.  Most robots have vertical pushing surfaces that will press nicely onto the defense wheels in a head-to-head pushing situation.  Finally, I’m trying to make my robot invisible to ultrasonic sensors.  These sensors have a hard time registering soft materials, such as the foam that I’ve covered my robot with.  This will not be effective against infrared sensors, but I may make a second “invisibility cloak” out of black felt for those situations.     

For the full challenge description see http://www.nationalroboticschallenge.org/joomla/index.php/downloadshttp://www.youtube.com/watch?v=c2fEy1XlVIc

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I loved the assembly process. And congrats on your victory! 

Ashim

 

congrats...

Congratz! This sumo is very effective :D

the foam was a great idea !!!!!

Gotta love that design :D

Well done!
I like your ultrasound stealth.

With regards to your future invisibility cloak for IR. Black velvet may not necessarily work. While all black materials look black to our eyes, not all black materials absorb IR Light.

You will need to make a small IR spotlight with a few IR LEDs to shine on the material and then look at it through a mobile phone camera. Some black materials are surprisingly reflective of IR.

Your next challenge will be to find ways to see through the stealth as I'm sure your competitors will follow your example in the future.

thanks for the advice!  I had not considered that.

I love the thought you put into your designs. I can see your going to keep on winning.

your robot had no 5 sec timer that is typical(?) with sumo bots. Otherwise, congrats on the win.

a number of the NRC rules differ from the typical mini sumo.  They prefer the robots not have timers. They also do not allow robots to expand, something many competition do.