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Date: Sun, 12 Jan 2003 09:33:08 +0100
From: mike cook
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.4) Gecko/20011126 Netscape6/6.2.1
Subject: Re: Pet Locator Design Help Needed
Organization: Club-Internet / T-Online France
NNTP-Posting-Date: 12 Jan 2003 08:33:09 GMT
What you need is something to stop the mut going away.
Aside from a lead (cheapest) or a good fence (expensive) you could try
the following.(patent pending)
It would consist of two parts.
In the home (or portable unit):
A low power transmitter sending a recognisable data stream . (Try a
transmitter with variable power output so that you can give more or less
freedom to the creature as you felt reasonable).
Apart from a pot to vary power and a scale in human understandable
distances this would be very simple as the data strean could be fixed.
On the cat/dog/elephant (did I hear 'husband' ?),
A device (also probably light weight) which would do the following.
Listen on the transmitters channel. Decode the received data stream.
I propose data rather than signal strength to test to reduce 'hacking'
If the onboard micro cannot decode the data stream, the onboard
1farad capconnected to a suitably placed electrode (your imagination)
would be shorted to remind the animal that the limit had been reached.
A modification to the code could cause the reminder to start off as a
tickle, working up to a good wallop if tiddles doesn't scoot back
through his trap at the double.
You don't have to search for the pets. After a short training period,
they will be looking for you.
Doesn't add to the already unbearable noise pollution that we suffer
(outside the shreaking of the quadruped).
Should be cheap. Ordinary RC transmitters for model cars are a dime a
dozen and don't have a great range, at least my kids 4x4 wheezes to a
stop after 50-100meters.
WARNING WARNING - might be hazerdous to pedestriens if tried out on birds.
Lots of additions to the design are possible( which I am also patenting
at this moment), such as the steerable dog option.
With this, the transmitter is upgraded to a 4 channel RC unit, with a
joystick.The collar would be fitted with 4 electrodes, which when
attached to the animals shoulders, would be actuated in relation to
the joystick position to put more turn in the leg action on the side
For stylists (only one on the block artists), a synchronous pulse
modulator could be added to induce a high steppin' trotting action.
The possibilities are endless...
Did I hear a squawk from the SPA?
I am adding 'part II' here as I realised as I pressed 'send' on the
first mail, that what I had invented wasn't just a pet retreiver but, in
the general sense a 'Virtual Cage'.
The original warning to the feathered friends appreciation society is
now made unnecessary by the latest developments in virtual cage technology.
As all bird lovers know, seeing your favorite budgie, parrot or canary
couped up in a small barred cage is a heartrending experience. Birds
are made to fly, and a polly reduced to an occasional flap is a sorry
Virtual Cage changes all that.
Now polly can be let loose in his electromagnetically patrolled
invisible cage to fly as he will. He will soon learn to keep within its
bounds.( THe RC version will allow team acrobatics ). Birds are caged,
not only to prevent escape , but also to control the extent to which
droppings are distributed around the house. Virtual cage has the answer
to that to, with the Intelligent Sphyncter control. Here the muscle is
kept contracted by default, only relaxing when the birds flight path is
calculated to pass over his tray. Here a second transmitter/receiver
pair is required but should be well within the bounds of current
technology. Determining the moment of release is crucial in this
application and my design team are taking some flak in trying to
Which remindes me to tell you that there may be a delay to product
availability while we try and find a way of preventing tampering to
the device controls which might enable illegal bombing runs to be
made on the unsuspecting, causing a breakout of aereal gang wars.
Another advantage of 'VC' tech is the enabling of overlapping cages
where multiple control zones can have some shared space allowing animals
to mix and make friends. Care will have to taken in mixing species but
this will enable enthuiasts to share collections without having to
actually go next door.
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