Subject:
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RE: IRPD
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 16 Apr 1999 16:55:17 GMT
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Original-From:
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Joel Shafer <joel@connect=IHateSpam=.net>
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Viewed:
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1237 times
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You are right, technically what I am measuring is angle and not width.
However, the IRPD code that I am using activates at about 4 inches away and
the rules of the RCX challenge limit the obstacles to walls and coke cans,
so I can pretty well identify the coke can by using the angle measurement.
At any distance within the IRPD range, the wall is going to measure at a
much wider angle than the can ( or so I hope ).
At 09:52 AM 4/16/99 -0700, you wrote:
>
> It will only know the width, if you know the distance -- otherwise all
> you know is the angle. Right?
>
> > -----Original Message-----
> > From: Joel Shafer [SMTP:joel@connect.net]
> > Sent: Friday, April 16, 1999 9:22 AM
> > To: lego-robotics@crynwr.com
> > Subject: IRPD
> >
> > I'm working on getting IRPD to no only avoid obstacles but also identify
> > objects. Primarily I am trying to get it to identify a coke can for the
> > RCX Challenge. When the IRPD finds an obstacle, the robot turns left until
> > the obstacle detection ceases. It then sets a counter and turns right
> > (while incrementing the counter) until the obstacle detection ceases again.
> > At the end of this process the counter contains the width of the object.
> > This measurement can be used to determine how to proceed. i.e. pick up the
> > coke can or avoid the wall.
> >
> > Anyone else experimented with object detection?
> >
> > Joel Shafer joel@connect.net
> >
> > --
> > Did you check the web site first?: http://www.crynwr.com/lego-robotics
Joel Shafer joel@connect.net
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: IRPD
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| In addition to checking for the width of the coke can, you could also have the robot drive its light sensor right up to the coke can, and check for what colour the can is. I'm assuming that coke cans are red, and that the walls aren't. I don't know (...) (26 years ago, 16-Apr-99, to lugnet.robotics)
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