Subject:
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RE: IR Ball (was Soccer-Playing Robots)
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 1 Sep 2000 14:27:06 GMT
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Original-From:
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Wilcox, Doug <doug.wilcox@imckesson.com!AntiSpam!>
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Viewed:
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622 times
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I suspect (but am trying to confirm) that the high number of LEDs was not
just to increase the area covered, but the luminosity as well. (Can one use
the term _luminosity_ for IR if it's outside our visible spectrum?) The
"brighter" the ball in IR terms, the better.
Doug Wilcox
Senior Web Developer
iMcKesson Provider Solutions Group-Needham
160 Gould Street, Suite 130
Needham, MA 02494-2308
Phone: 781.453.2900 x 237
Fax: 781.455.7990
e-mail: Doug.Wilcox@iMcKesson.com
http://www.imckesson.com
"You see, I had this space suit. How it happened was like this ..."
(Opening lines from Robert A. Heinlein's Have Space Suit-Will Travel)
-----Original Message-----
From: John Barnes [mailto:barnes@sensors.com]
Sent: Friday, September 01, 2000 1:18 PM
To: lego-robotics@crynwr.com
Subject: Re: IR Ball (was Soccer-Playing Robots)
>That wouldn't look as great as a free rolling ball - and the
>robots would perhaps have trouble finding it while it's in
>motion....but 28 LEDs is a heck of a lot!
Seems like a lot to me. The wider angle IR LEDs have a 60 degree
cone. I think you can cover a sphere with 14 such cones, but don't
quote me!
I wonder if you'd then require a point source battery right at the
center ;)
JB
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Message has 1 Reply:
 | | Re: IR Ball (was Soccer-Playing Robots)
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| (...) That is right. It's not only a mere problem of area covering, but the main objective is to have the robot locate the ball quite quickly without a significative error. We tried at first with the same ball and less LEDs and it was working, but (...) (24 years ago, 1-Sep-00, to lugnet.robotics)
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