Alexy is correct. Due to the integrative nature of accelerometers, the longer the time, the more error associated with any result.
On Wed, Apr 2, 2008 at 12:09 PM, Alexey Feldgendler <[EMAIL PROTECTED]> wrote: > On Wed, 02 Apr 2008 17:52:56 +0200, Flemming Richter Mikkelsen < > [EMAIL PROTECTED]> wrote: > > What do we need the CAN interface for? > > We already know the speed before we enter the tunnel, and if the neo > > is in a car holder in a stable position, calibrated with some > > software, it knows from the accelerometers if we are driving strait > > ahead or making a turn and also if we are accelerating. With a little > > bit of mathematics, this can turn out to be very precise. > > > > As you're driving through a long tunnel (the longest one in Norway being > 24.5 km), error accumulation will deteriorate the precision to the point of > rendering the data useless. > > > -- > Alexey Feldgendler <[EMAIL PROTECTED]> > [ICQ: 115226275] http://feldgendler.livejournal.com > > _______________________________________________ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community >
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