[Robotgroup] Triangulation

[Paul Atkinson]

There is a system called NorthStar that used IR transmitters and receivers
for indoor use. I think there was some recent news about Version 2 being
used in a main stream product, possibly Wowwee toys or something. I doubt it
would work well against sunlight.
http://www.evolution.com/products/northstar/

You might be able to do something similar for less money.

Certainly not in the $40 range per this link:
http://www.acroname.com/robotics/parts/R274-NS-PROJECTOR-KIT.html

Buried wire systems have been used for defining yard perimeters and also
have been embedded in floors, FWIW. I don't know if they can be modifed

Paul

On Feb 1, 2008 4:20 PM, Robo Al <sp-18561884 at ggsys.net> wrote:

> Does anybody know any links or reference material
> about non GPS triangulation?
>
> I would like to play with something within these
> requirements:
>
> * open and closed spaces around 150'x100' max size (ie.
>  a yard or inside a house)
> * accurate to within 1 to 3 centimeters
> * inexpensive. Hopefully sub $40 for parts.
> * A computer or fast uC will be available to do the
>  calculations so the $40 is just for sensors and I/O
>  interfacing to the computer.
>
> I would imagine setting 3 or 4 radio beacons within my
> fence posts, but I'm afraid I just don't know enough
> about radio triangulation.
>
> Thanks,
>
> Alberto
>
>
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