Alan Pearce wrote:
>>However, if you were to add "some" kind of fixed markers, I
>>think a combination approach between marker sensing and dead
>>reckoning based upon an internal representation would put you in
>>business.
>>
>>Possibly a wire around the outer perimeter, as Quiet Joe mentioned,
>>plus some low bricks at the edge of the flower beds, etc.
>
>For mowing a lawn it may well be possible to have some IR Led marker posts
>at strategic points which the bot could sense.
......
 If each led was permanently implanted
>in the garden border and operated at a different frequency then the bot
>would always know where it was.
.......


Alan, in fact this is precisely the scheme I plan to employ when
I get to the point of having my bots navigate around multiple rooms
inside the house.

Each room will have at least 1 permanent beacon, with that in each
room modulated at a different freq. Once the bot acquires a beacon,
it will know what room it is in, and then it can use other techniques
to map the room, but it will always have a fixed reference point to
prevent getting hopelessly lost. Also, if it does get lost inside
a room, it can go over to the beacon and start over.

$1 beacon or $120 GPS???

- dan
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