[time-nuts] GPS chicken tracker (slightly OT butsorta-not-really)

[Jean-Louis Oneto]

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" <bruce.griffiths at xtra.co.nz>
To: <jfor at quik.com>; "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
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 -- time-nuts at febo.com
>> To unsubscribe, go to 
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.