Hello,
Around here (Provence, France), to describe a very steepy land, one say that
the inhabitants need to attach nets to the hen *ss to avoid egg from rolling
downhill...
Of course, it not electronic and don't solve the "timing" part of the
question, but since the original questin was _where_, that could a
traditional approach...
Best regards,
Jean-Louis
----- Original Message -----
From: "Bruce Griffiths" <[email protected]>
To: <[email protected]>; "Discussion of precise time and frequency measurement"
<[email protected]>
Sent: Wednesday, December 23, 2009 8:02 PM
Subject: Re: [time-nuts] GPS chicken tracker (slightly OT
butsorta-not-really)
The success of that will depend on the vegetation cover available to the
chickens.
One problem is that at least some countries require that the time that the
egg is laid be known to within a few hours.
Several day old eggs sitting in the heat of the sun cannot be sold.
Bruce
J. Forster wrote:
Depending on the range area, if it could be monitored with TV cameras, a
simple relaxation oscillator and IR LED on each chicken might work.
They'd
be tiny and light weight.
The cameras could be equipped with narrow band pass optical filters and
the video frames added up into say 10 minute integrated images in a PC.
Because it's pulsed IR, it'd work both day and night.
The integrated image would look like a trail of bread crumbs,
interspersed
with blobs where the chivcken stopped for a while.
FWIW.,
-John
==============
Jim Palfreyman wrote:
A friend of mine has asked me for a good GPS method to find out where
his chickens are laying eggs.
A GPS tracker comes to mind but some
(http://www.coolest-gadgets.com/20060405/really-cool-portable-gps-tracker)
seem good but expensive.
Does anyone have any cheap (and possibly smaller) alternatives?
Regards,
Jim Palfreyman
Turn the problem on its head and fix a transmitter to each chicken.
One can then use range measurements from several antennas to track the
chickens, just assign a unique PRBS code to each transmitter.
You should be able to do all this with a SDR and some software.
This is likely to be cheaper per chicken than using a GPS tracker.
Bruce
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
