>>>>> "AW" == Arnaud Westenberg <[EMAIL PROTECTED]> writes:
AW> I'm building a datalogging system in a racecar. Instaed of saving
AW> the data local in the vehicle I would like to send the data over
AW> _some_ connection. It doesn't matter to me what kind of connection
AW> this will be, as long as it doesn't use radio frequencies. (the
AW> system has to comply with the racing sports regulations)
AW> The data would be sent when the car passes the pits. This means
AW> the connection would be from the moving vehicle at a distance of
AW> max. 15m at a velocity of max. 200 km/h These numbers are just
AW> indications.
Ok, 200km/h is about 50m/s. Assuming the car goes in a straight line
and just barely misses the receiver when it is closest, we have 30m.
That is 0.6 second. A targetting device for keeping the beam on the
receiver is probably impractical at that speed, so you would need a
wide-angle beam. Anything less than the full 180 degrees is going to
limit the time window even more. You will need a fairly strong beam.
Definitely stronger than any infrared device I have seen.
Benny
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