Might be interesting to investigate the systems that Allflex
http://www.allflex.co.nz/ and TruTest http://www.trutest.co.nz/ use for
animal electronic identification. Texas Instruments also had some RF ID gear
a while ago too.
> -----Original Message-----
> From: Leo Ramakers [SMTP:[EMAIL PROTECTED]]
> Sent: Friday, April 07, 2000 10:22 AM
> To: Multiple recipients of list delphi
> Subject: Re: re [DUG]: RFID
>
> {apologies, I just dropped in to this conversation}
> I was involved in the animal tracking industry 10 years ago (AWA data
> systems),
> and we were looking at interfacing to a system using embedded passive RF
> chips
> made by a firm in palmerston north. The original work had been done by the
> thin
> film labs of DSIR and it had been turned commercial in the hope of
> creating a
> marked similar to the pig tracking system developed by the dutch. I dont
> recall
> the name of the company and havent followed its fortunes, but I know that
> it
> used a passive embedded thin film chip which was irradiated by a RF source
> scanner, which provided the energy for the chip to 'chirp' back a unique
> rf
> code sequence.
>
> regards
> Leo
>
> Terry Johnson wrote:
>
> > I know the tag side fairly well, but I don't know any hand held readers
> > (but they must exist).
> >
> > There are several technologies available, from the older 150kHz active
> and
> > passive tags through to the microwave stuff that has been developed to
> be
> > read on trains passing a reader at 300km/h!
> >
> > Technology considerations are read range, whether you need multiple tags
> > readable concurrently (identify a handful of tags at once) and power
> > consumption/tag life.
> >
> > Regards,
> > Terry
> >
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