All the big Race series, except F1 use AMB/it transponders. Each unit
mounts in the car and passes over a loop cut in the track. The loop is
connected to a receiving unit which processes the transponder number and a
time. That time and transponder number are then sent to a pc over a
standard serial connection.
And if it's a serial connection the data can then be sent over
copper/fiber/or wireless.
FYI, The club racing version of the AMB system is only accurate to .002 if I
remember correctly. The pro version is accurate way deep in the decimal
places, and that is with cars passing at up to 300mph....
Rick
----- Original Message -----
From: "Brian Berryhill" <bikepoet@netzero.net>
To: "Autox" <autox@autox.team.net>
Sent: Tuesday, June 11, 2002 2:32 PM
Subject: Re: Wireless autocross timing equipment?
> Something like this would work if a single trigger is used, but only one
car
> could run on the course and the entrance/exit would have to use the same
> "lane".
>
> But for a dual setup.. one start trigger and one finish trigger to allow
> multiple cars on course with start and finish triggers in separate
> locations, an accurate connection would have to exist (wires) between them
> since the important timing separation is between start and finish
triggers.
> Then you could use a wireless device to transmit that data, but that would
> take away the benefit.
>
> In the future, there will probably be time signals over the airwaves (does
> GPS do that?) so you could have multiple wireless timers spread throughout
> the course and get accurate start/split/finish readings. Now that will be
> cool. How do they calculate split and gap times at race tracks that F1,
> CART, and IRL use?
>
> Brian
>
>
>
> ----- Original Message -----
> From: "Patrick Washburn" <washburn@dwave.net>
> To: "GPSoftware" <gpsoftware@icehouse.net>; <autox@autox.team.net>
> Sent: Tuesday, June 11, 2002 7:48 AM
> Subject: RE: Wireless autocross timing equipment?
>
>
> > I know nothing about electronics, but instead of replying on the trigger
> > head to transmit the signal in real time and be limited by the physics
of
> > wireless transmitting, why not have the trigger record the time on a RAM
> > chip or something built into the timer head and then transmit the
recorded
> > signal at the more leasurly wireless pace? (I am assuming that the rate
> of
> > wireless transmitting is limiting the replution.) Would result in but a
> > couple micro-seconds delay and you could record the actual time in
> whatever
> > resolution you want. Just a dumb suggestion from someone who doesn't
> really
> > know what he's talking about.
> >
> > Patrick Washburn
> > C-Tech Trailer Cabinets
> > Designed for the Racer
> > Wausau, WI
> > www.racecabinet.com
> > 715-355-8842
>
> /// unsubscribe/change address requests to majordomo@autox.team.net or
try
> /// http://www.team.net/cgi-bin/majorcool
> /// http://www.team.net/mailman/listinfo
> /// Partial archives at http://www.team.net/archive
> /// Send list postings to autox@autox.team.net
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Partial archives at http://www.team.net/archive
|