Re: [mowbot] Ultrasonic hardness measurement

Monta Elkins (Monta nospam at vt.edu)
Thu, 26 Sep 1996 08:40:37 -0400

Dave Everett wrote:
>
> Monta Elkins wrote:
> >
> > Dave Everett wrote:
> > >
> > > I set up an experimental breadboard to test the possibility of
> > > differentiating between grass and concrete.
> >
> > Thats pretty interesting, but I'm not sure it practical.
>
> That's why I'm doing the experiment Monta, so *I* can be sure!

Thanks Dave.
I rely a little too heavily on 'thought experiments',
instead of real-world results.

> >
> > We'd have to distinguish between:
> > grass and concrete
> > grass and asphalt
> > grass and mulch
> > grass and gravel / pebbles
> > grass and lettuce
> > grass and flowers
>
> No we wouldn't, we'd have to distinguish between hard and soft surfaces.
> This sensor isn't meant to be everything, it's one of perhaps many.
> >
> > Thats why I'm so interested in 'position' technology
> That's why I'm not.

> I suggest you review the results of positional work
> related to robots to date.

That sounds like an excellent idea.
Can you recommend a few, I'll check my library for them.

Thanks,

-Monta Elkins

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| "All that is necessary for evil to triumph is |
| for good men to do nothing." -- Edmund Burke |
| Monta nospam at bev.net ----------------- http://www.bev.net |
| System Administrator - Blacksburg Electronic Village |
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