Ball catching robot, 80% accuracy in 5 milliseconds (w/ video)

April 29, 2011 by Katie Gatto weblog

Ball catching robot, 80% accuracy in 5 milliseconds (w/ video)

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(PhysOrg.com) -- DLR, an aerospace agency based in German, has modified its flagship robot, known as the Rollin’ Justin, in order to make it into a lean, mean, catching machine. The Rollin’ Justin's modifications allow the machine to catch balls that are thrown in its direction with an accuracy rate of about 80%. The Rollin’ Justin's robots accuracy rating is better than the average uncoordinated human. It is certainly better than this reporters accuracy rate. It is not as good as say, a Major League Baseball player, but then again most of us cannot say that we are as good as the pros either. Considering they also have near unlimited stamina, at least until the battery runs out, it may be a great partner for the standard game of catch, or for the position behind the batter.

This video is not supported by your browser at this time.

The machine can actually catch up to two balls at once, and while this may not sound like a lot on paper, but just try doing it in the back yard. It is not exactly an easy task. The will, when the balls are released, calculate the flight path of those two balls, and then position its hands into a catching position that is within 2 centimeters of the point where the ball is expected to be, in about just 5 milliseconds. The system does work with the help of external computers. They are needed in order to handle the processing and make the calculations possible in real time.

The Rollin’ Justin weighs about 45kg , and it is equipped with a 3D camera system that allows it to pinpoint the objects distance, which needed in order make the calculation. The robot is built with 43 joints, with 5 in his torso, 7 in each of the arms, and 12 in each hand. It is also equipped with a total of 84 sensors.

More information: http://elib.dlr.de/67146/
Via IEEE

© 2010 PhysOrg.com

4.4 /5 (7 votes)  

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Isaacsname
Apr 29, 2011

Rank: not rated yet
Ninja robot soon to follow...I'm sure of this.
trekgeek1
Apr 29, 2011

Rank: 5 / 5 (3)
Video didn't work for me. Try this link

http://www.youtub...PwP3s7s4
Isaacsname
Apr 29, 2011

Rank: not rated yet
Video didn't work for me. Try this link

http://www.youtub...PwP3s7s4


They should get together with these researchers

http://www.youtub...jVlaLBmk
antialias
Apr 29, 2011

Rank: 5 / 5 (2)
Next they'll be catching bullets.
SmartK8
Apr 29, 2011

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antialias: In the WWIII, they will. ;)
Starbound
Apr 29, 2011

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Great videos, gentlemen! Kind of makes me want to make a robot.
Fig1024
Apr 29, 2011

Rank: 5 / 5 (1)
can an an electric motor joint achieve speeds necessary for bullet catching? even if it was possible to calculate bullet position and trajectory instantly, what kind of motors would handle the arms?
Deadbolt
Apr 29, 2011

Rank: 3.7 / 5 (3)
Humans average about 215ms for visual reaction, with a limit towards 100. A housefly, because of its tiny optical nerve distance and relatively limited processing, can manage 20 milliseconds before responding to stimuli. At 5ms, This machine thinks 4 times quicker than a fly apparently.

With some modifications, this machine COULD potentially block bullets, even with just human speed. If it only has to move an arm 50cm to block the bullet, and it can spot a 450m/s bullet at 2.25 meters out the barrel, then, at a perfectly achievable arm speed of 20m/s, it could grab the bullet when fired from 13.5 meters (11.25 meters plus reacting/calculating time) away...

Now, why you'd want to "grab a bullet" when it's the equivalent of getting shot in the hand, I don't know. Future death robots will be better off just dodging.

Actually... robot bodyguards, anyone?
VOR
Apr 30, 2011

Rank: not rated yet
cool stuff. will be even more impressive when it throws them back.
After all, playing catch is so much more fun.
Beard
May 01, 2011

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The bullet would disintegrate in your grasp even if you caught it. The robots would need hands/shields made of a hardened material immune to bullet impacts. Then they could block bullets.

Strap one of those badboys on your back and laugh as the terrorists try to shoot you.
trekgeek1
May 01, 2011

Rank: not rated yet
The robot could just tap the bullet to send it off course. This way most of the kinetic energy isn't transferred to the hand.
Decimatus
May 01, 2011

Rank: not rated yet
More likely the robot will kill/disarm the gunman before he can even tell his little finger to pull the trigger.

I wonder how fast robot legs will be able to get to 60 mph?

"It's ok Chris. I am pretty sure she would have crushed your scrote into a Diamond with her robot strength arm." - Stewie
rwinners
May 01, 2011

Rank: not rated yet
Cool. Now rich dads can buy a standin.
emsquared
May 04, 2011

Rank: not rated yet
Now if they can get 'em to throw and swing a bat, we'd have BASE WARS in no time!
(http://en.wikiped...se_Wars)
Rollin' Justin actually kinda looks like the one batting... wierd.
Rank 4.4 /5 (7 votes)
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