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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Wed, 5 Mar 1997 07:39:55 GMT
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Original-From:
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Richard Vannoy <richardv@!AvoidSpam!abac.com>
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Reply-To:
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richardv@abac.com&Spamcake&
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Viewed:
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2476 times
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> 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 has 1 Reply:
 | | Re: IR collision avoidance
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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. (...) (28 years ago, 9-Mar-97, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Re: IR collision avoidance
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| Riachard, 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? (...) (28 years ago, 2-Mar-97, to lugnet.robotics.handyboard)
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