Subject:
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Re: IR scanner
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 30 Nov 1999 13:45:18 GMT
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Original-From:
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Pete Hardie <pete.hardie@dvsg.sciatl.[nospam]com>
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Viewed:
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604 times
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Christian Jacobsen wrote:
> What if you built a rotating laser or infrared transmitter on top of your
> robot? Three sensors located at specific locations around a maze (for
> instance) could register the time delay between laser (or infrared)
> "pulses".
>
> The longer the delay, the farther away the robot is from the sensor. And
> the converse.
I may be underestimating the capabilities of current Lego sensors, but I believe
that the time difference of (light across 1 foot) and (light across 10 feet)
would be too small to register without some seriously fast processing.
[ BTOE check...
186000 mi/s * 5280 feet/mi = 96,720,000 ft/s ==> 1.0339e-08 s/ft
means we're talking about hundredths or thousandths of microseconds
here.....]
--
Pete Hardie | Goalie, DVSG Dart Team
Scientific Atlanta |
Digital Video Services Group |
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Message has 2 Replies:
 | | Re: IR scanner
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| Why don't you just get a Pentium III at 900MHz to run a sensor?! If it is not fast enough, then you could still have one brick that could beat the snot out of most of the computers that are running them!!! (+ extra RAM, not firmware - real programs (...) (25 years ago, 30-Nov-99, to lugnet.robotics)
| | | Re: IR scanner
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| In reply to: (...) believe (...) A couple of quick points here: Your value of 96,720,000 ft/s, while accurate and sounds extreme should be considered in it's proper context. For the light to travel 1 foot, the object must be 6 inches away (6in there (...) (25 years ago, 1-Dec-99, to lugnet.robotics)
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Message is in Reply To:
| | IR scanner
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| All the talk recently about lasers, traversing mazes, infra-red transmission, and trying to accurately track your robot's position in a room or maze has gotten me thinking. What if you built a rotating laser or infrared transmitter on top of your (...) (25 years ago, 30-Nov-99, to lugnet.robotics)
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