Subject:
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Re: Wall Following
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 25 Mar 1998 03:05:20 GMT
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Original-From:
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K.L. McKinnon <klmckin@magmacom.com&nomorespam&>
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Viewed:
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1527 times
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I wrote a similar type scenario using a PIC (pre handyboard user)...
The trick I found was not to rely on a single return, but multiple. That
is, use a counter, to count the number of hits. Use 64 as a base number,
count down for each hit, up for a miss (always max 64)... You get the idea,
when the counter reaches 0, youre probably damn close to something....
I used 256, at 1ms between shots, left and right transmitters with a common
receiver (Mobile Robots, Inspiration.. Chapter 5), for the hardware design
and a lot of playing for the software. I didn't move very fast about
1"/sec, so could afford the multiple hits. Your mileage may vary.
K.L. McKinnon
> At 09:05 PM 3/24/98 +0000, Chris White wrote:
> > Hi All,
> >
> > A major problem, that has been the bain of my life for the last 3
> > months. <snip>
>
> Correction: the problem has been the *bane* of your life--not the bain.
> I'm the bain of everyone's life.
>
>
> > Problem is the infra-red !! I have spent many weeks trying to get the
> > robot to follow walls using infra-red, and various other methods, but
> > to no avail !! The infra-red is too tempramental, or too sensitive to
> > be of any use. Has anyone else had any experiences like myslef, that
> > couold possibly help ??
>
> The best solution to the problem that I've seen is in the 6.270 Robot
> Builder's Guide, which can be downloaded off of the documents page of the
> Handy Board web site. Fred Martin describes the bend sensors that were
> developed for the Nintendo Power Glove. They're used as variable resistance
> feelers for very precise positioning from walls, etc. Unfortunately, I
> don't know where to buy them. Maybe someone else on list could tell us
> where we could buy these bend sensors?
>
> --Will Bain
> , ,
> __@_/ \_@__ |/
> | /__, o @_/
> )\ ) ( \ (\/\\,
> ~~~~~~~~~ ' ` ~~~~~~~~~~~ ` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Wendy Parson, Suburbia is where the developer bulldozes out
> Will Bain, the trees, then names the streets after them.
> & Tatoosh --Bill Vaughn
>
>
>
K.L. McKinnon
klmckin@magmacom.com
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