[mowbot] IR grass detector

Thomas A Maier (tmaier+ nospam at andrew.cmu.edu)
Wed, 25 Sep 1996 07:47:07 -0400 (EDT)

> The inside of the wheels is painted white. Two pair face out towards
> the wheels the other pair gos from one to the other.

I don't know what the grass is like in other parts of the world but when
I flip my mower over to look underneath, e.g. at oil change time, I have
trouble finding the plug for all of the organic *crud* caked on the
underside. Relying on ANY form of light sensor under the deck is a bad
idea unless, of course, you take the *Mercedes Benz approach* and put a
little windshield wiper in front of it. :-)