Newsgroups: comp.robotics
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From: piggy@hilbert.cc.utas.edu.au (La Monte Yarroll)
Subject: Re: Run Rabbit...Run. Cat detectors.
Message-ID: <piggy.730511625@newsroom.utas.edu.au>
Sender: news@newsroom.utas.edu.au
Organization: University of Tasmania, Australia.
References: <1mbht6INN2s9@clover.csv.warwick.ac.uk>
Date: Tue, 23 Feb 1993 23:53:45 GMT
Lines: 16

esrbu@csv.warwick.ac.uk (Mr I M Hunter) writes:

>Dear all,
>        I wish to build a small (tennis ball sized) mobile robot that has
>a self-preservation instinct when faced with my cat. That is, it runs away
>from it. The thing is how does it detect where the cat is and whether it
>has pounced upon my poor, doomed robot.

A variant on the antenna suggestion earlier is to attach the antennae
to medium frequency LC oscillators, and monitor frequency shifts (like
a Theramin).  This should be dirt-cheap and fairly sensative.
--
La Monte H. Yarroll	Home:		piggy@baqaqi.chi.il.us
   Work:		piggy@hilbert.maths.utas.edu.au
   AKA:			piggy@gargoyle.uchicago.edu
   Once upon a time:	postmaster@clout.chi.il.us
