🚀 go-pugleaf

Here are a couple of systems:

Celesco's V-scope system.
It uses several (up to eight) 'buttons' that read an IR signal and retransmit
an acoustic signal. For 3D three transceiver towers are used to send the IR signal
and receive the acoustic signal from the buttons. [40Khz freq]

System resolution is claimed to .004" (0.1mm) and up to eight bodies
can be tracked for distances up to 16 feet in 3D.

It doesn't say what the accuracy is however - I'm looking into these systems
to develop a calibration system for a new robot I'm building.

Anyway - Celesco is at PO Box 7964, Canoga Park, Ca 91309 (818) 884-6860

Another is Innovision Systems at (313) 573-9845.
They have a system that uses two cameras that use PID chips to track small
spheres coated with 3M retro-reflective material (lots of tiny spheres) that
act very similar to corner cubes. The cameras also have IR emitters to
provide an active light signal that enables the filtering of ambient light.
We had a demo here a few months ago and it seemed to work quite well.

The other system used for Raibert's hopping machines here at CMU in the mid-80's
was the Selspot system which tracked modulated IR LED's. Selspot is a Swedish company
but I don't have their address on-line here.

					nivek


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aka: Kevin Dowling			Carnegie Mellon University
tel: (412) 268-8830			The Robotics Institute
adr: nivek@rover.ri.cmu.edu		Pittsburgh, PA 15213