From: email@example.com (Stephen H. Westin) Date: 13 Mar 2000 12:42:27 -0500 Organization: Cornell University Program of Computer Graphics References: 1
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Ed McBride <firstname.lastname@example.org> writes: > I am a consulting engineer in Colorado Springs with a client who wants > to track a few objects using on-board accelerometers and gyroscopes > that communicate with a central processor. The objects are confined to > an area of roughly 25 meters square, and a height of no more than 5 > meters above ground. It is necessary to know the location of each > object within about 0.1 m, over a time period of a half hour or so. > The objects can move at speeds up to 10 m/s, and can experience > accelerations up to 2-3 g (20-30 m/s^2). The objects can also rotate > at angular velocieies up to a few rev/s. (10-15 rad/s). The cost of > the system cannot exceed something like $2,000 per object. <snip> Well, your problem sounds like typical motion capture for computer animation. You might want to look at Polhemus's electromagnetic tracking systems. See <http://www.polhemus.com>. Logitech used to market a 3D mouse based on ultrasonic tracking technology, but that seems to have been dropped. As someone else pointed out, optical tracking might wind up as the way to go. The University of North Carolina has a high-precision optical tracker, the HiBall, that might work. See <http://www.cs.unc.edu/Research/ProjectSummaries/tracker.pdf>. I understand that inertial navigation might not do your job. Phase-integrating differential GPS would (accuracy ~1 cm), but probably costs too much and is less effective at orientation. Ordinary differential GPS might be cheap enough, but I understand is only accurate to within ~1 m. -- -Stephen H. Westin Any information or opinions in this message are mine: they do not represent the position of Cornell University or any of its sponsors.