Alt-BEAM Archive

Message #04325



To: "'beam@sgiblab.sgi.com'" beam@sgiblab.sgi.com
From: "van Zoelen, Bram SSI-TSEA-352" Bram.A.A.vanZoelen@is.shell.com
Date: Mon, 7 Jun 1999 13:51:11 +0200
Subject: [alt-beam] Re: BEAM forcefield....


Here's an idea for a "force-field" like border-less table for robots.

Get your robot and mark how far this robot can go to the side without
dropping of the table. Now get some magnetic stripes that can be found in
the sealing of a refrigirator door. These magnets can be bent to som extend.
Now glue this magnet to the table marking its bounderies. You can raise the
rest of the table with cardboard so it will look like the magnets are sinked
into the table. Now connect a reed switch parallel to to wires that make the
robot reverse. Place the reed switch at the center of gravity on the under
side of the robot.

Now your robot will move around and avoids the sides. Simple and effective.

Bram
http://www.xs4all.nl/~vsim


> ----------
> From: Don Papp[SMTP:donp@cronus.oanet.com]
> Reply To: beam@sgiblab.sgi.com
> Sent: Thursday, June 03, 1999 9:51 PM
> To: beam@sgiblab.sgi.com
> Subject: Re: BEAM forcefield....
>
>
> I think there is some interesting applications out there for this
> idea. Magnets/coils could be used to mark 'forbidden' areas that would
> not otherwise be visible to a bot's limited senses.
>
> I am going to experiment with placing a tablet-style magnet on the
> bottom of a photovore and place an (opposing pole up) magnet underneath
> the plastic 'floor' it runs on. The idea is to see if the photovore
> avoids the 'forbidden' zone (marked in some way to be visible to humans
> for testing purposes) despite light being purposefully placed to lure it
> into the zone.
>
> Perhaps I could try replacing the feelers with hall effect
> sensors, so being near a magnetic field would trip them and produce the
> same effect as having bumped into something. That would be easier to
> implement in some ways.
>
> Used in conjunction with touch sensors, beam bots could therefore
> avoid high-traffic areas (marked by magnets) or even cavort away in a
> wall-less RJP. Until they learn to FEED ON FLESH.
>
> | Donald Papp, T.T., MCP
> | Support Analyst
> | OA Internet Inc.
> | don@oa.net
>

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