Subject:
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Re: IR collision avoidance
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 9 Mar 1997 03:53:47 GMT
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Original-From:
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MAR ERICSON <mar@cooper%stopspam%.edu>
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Viewed:
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1965 times
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Some IR Leds have graphs from the manufacturer showing angular
characteristics. I've seen some nice ones in linear and polar plots of
angle vs. intensity. See if you can get the specs of the LEDs you order.
This may help you with your configuration.
-----------
ericson mar
Master of Engineering Candidate
Project: Mobile Robotics
mar@cooper.edu
Department of Mechanical Engineering
The Cooper Union for the Advancement of Science and Art
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On Tue, 4 Mar 1997, Richard Vannoy wrote:
> > Could you please explain to me how the IR emitter angled at
> > 45 degrees is able to pick up its beem. I'm unsure of the
> > IR emmission dynamics. Wouldn't an IR angled perpidicular
> > to the wall being travelled along suffice as the only sensor?
> > Is the 45 degree angled IR pickup on the upcoming walls?
>
> Someone could probably give some very good reasons why 45 degrees is a
> good choice. For me it was common sense and experiment. Less than 45
> degrees from ahead and the angle the IR is hitting the wall is too
> "shallow" and I don't get a return. More than 45 degrees and I can't
> "see" stuff. I can get a "blind spot" and not react to an obstacle
> between the two beams. Also greater than 45 and I was farther from the
> wall than I wanted to be with the IR I happen to have now. 45 gave me
> 18 inches, 60 gave me almost three feet and I didn't want that.
>
>
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Message is in Reply To:
 | | Re: IR collision avoidance
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| (...) Someone could probably give some very good reasons why 45 degrees is a good choice. For me it was common sense and experiment. Less than 45 degrees from ahead and the angle the IR is hitting the wall is too "shallow" and I don't get a return. (...) (28 years ago, 5-Mar-97, to lugnet.robotics.handyboard)
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