Well, if you're going to do that then you could write a small filtering
program in Matlab.  We wrote an application to count the amount of change in
a picture taken with one of those small Agilent CMOS cameras you see in all
of the phones now.  Fun project, and not terribly difficult either.

But I still think some sort of laser sight would work the best.  Every time
the line is broken, you have a vehicle in the "trap".


On 10/11/06, Mauricio Jancic <info@janso.com.ar> wrote:
>
> I would suggest to use a desktop computer and a camera, it would be chip
> and
> you will avoid developing it, if it's a one time project. I have a
> software
> to do the task, it can use, for example a cheap ip camera. It's intended
> for
> other purposes, but can be modified to identify moving cars and count
> them.
>
> Regards,
>
> Mauricio Jancic
> Janso Desarrollos
> www.janso.com.ar
> info@janso.com.ar
> (54) 11-4542-3519
>
>
> > -----Original Message-----
> > From: piclist-bounces@mit.edu
> > [mailto:piclist-bounces@mit.edu] On Behalf Of Debbie
> > Sent: Wednesday, October 11, 2006 8:04 PM
> > To: Microcontroller discussion list - Public.
> > Subject: [EE] Vehicle detection - magnetic sensors?
> >
> > PICers,
> > I have  a possible(?) project coming up that involves vehicle
> > detection/counting. Pessure mats, wire loops etc not an
> > option. The gizmo needs to be small, & portable - the
> > requirement is to count cars as they enter/leave a large
> > outdoors *BIG* temporary car park. The cars will come down a
> > narrow track marked out with poles/flags, so the sensor can
> > be positioned pretty close as they pass buy. digging up the
> > grass for cables etc - No No.
> >
> > I was thinking maybe of Honeywell's detectors. To wit, one of
> > these --->
> >
> > http://www.ssec.honeywell.com/magnetic/mark_det.html
> >
> > Has anyone used them? Are they OK? Are there better/cheaper
> > devices around?
> >
> > Thanks for advice - Debbie
> >
> >
> >
> >
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-- 

Shawn Wilton (b9 Systems)
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