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[DPRG] Tarzan's lessons learned at the DPRG Outdoor Challenge
Subject: [DPRG] Tarzan's lessons learned at the DPRG Outdoor Challenge
From: Randy M. Dumse
rmd at newmicros.com
Date: Sun May 18 11:08:57 CDT 2008
Robert F. Scheer said: Saturday, May 17, 2008 5:59 PM
> Haven't a clue. I've never seen 3-D maps of magnetic flux on
> the scale of parking lots and robots near the earth's
> surface. It would be an interesting science project.
>
> I do have a comment though. Raising and lowering a mast is
> not a practical way to equip an outdoor robot unless you
> don't care if it stops to make the measurements, because it
> would be critical to make the z measurements at the same x,y
> coordinate.
>
> Perhaps more than one magnetometer placed at different
> heights could give you simultaneous data that would be
> useful, but I've never heard of anyone actually doing this
> and certainly haven't seen a study of it.
Bringing this post back to the DPRG, think it came to be
directly...
Yes I'd thought of using three separate magnetometers, but I'd
think that would be much more expensive than a single one with a
lifting arm.
Also I rather like the idea of stopgging to take a reading. It's
a fine tradition we humans do: "stopping to take our bearings",
as it is said.
Further, I've always been concerned about jBot wacking that mast
on a picnic table or bench, because it is above the range of the
sonars to see. Dpa and I have discussed this, and as I recall
it, it does pretty well avoiding those situations, but we were
able to set it where it had that trouble at UTA once. The other
behaviors got it out of the situation, but it is possible to
have it hit the mast on a something like a low plane, or bar.
So I like the idea of keeping the compass tucked down, and
occassionally sensing where to stop to hoist it into clean air.
I don't know, it's more moving parts, but then, I think we are
perhaps more fascinated by robots with more moving parts, et?
Randy
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