Subject:
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Re: Robot Positioning using Beacons
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 1 May 2002 23:50:59 GMT
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Viewed:
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9987 times
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Would a HandyCricket be good for driving the beacons?
"Chris Steiger" <csteiger@comcast.net> wrote in message
news:GvGHKu.2wr@lugnet.com...
> That sounds good, but what do I use to drive each beacon, (e.g. send out • the
> coded IR signal and sonar ping). Using a full blown microcontroller like
> the handyboard for each one would be incredibly expensive and wasteful. I
> only need a controller capable of doing just what is required.
> Unfortunately I don't know quite enough about microcontrollers and
> electronics to design one myself.
>
> Could you offer me some advice? Give me some basics to point me in the
> right direction and my current knowledge should then be enough.
>
> Thanks for the help.
>
> Chris
>
>
> "Fred G. Martin" <fredm@alum.mit.edu> wrote in message
> news:2718ABBA-5D0F-11D6-8B9F-0003934F857A@alum.mit.edu...
> > The problem with IR is that it tends to get everywhere, reflecting
> > off of surfaces etc, so it's hard to triangulate.
> >
> > May I suggest a related but different approach.
> >
> > Make your beacons out of hybrid IR/sonar transmitters. The beacons
> > will periodically send a coded signal on the IR (e.g., "beacon 1")
> > as well as a simultaneous sonar ping.
> >
> > The robot can then receive the IR pulse and the sonar ping, and
> > measure the time lag between them to determine distance from the
> > beacon. (The IR pulse will travel more or less instantaneously,
> > while the sonar is ~1 ft per millisec.)
> >
> > Put a couple of these in your room and you can triangulate.
> >
> > fred
> >
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Message is in Reply To:
 | | Re: Robot Positioning using Beacons
|
| That sounds good, but what do I use to drive each beacon, (e.g. send out the coded IR signal and sonar ping). Using a full blown microcontroller like the handyboard for each one would be incredibly expensive and wasteful. I only need a controller (...) (24 years ago, 1-May-02, to lugnet.robotics.handyboard)
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