Newsgroups: comp.robotics
Path: brunix!sgiblab!darwin.sura.net!howland.reston.ans.net!torn!utnut!skule.ecf!gladman
From: gladman@ecf.toronto.edu (GLADMAN AVIV)
Subject: Re: Position - how to know/keep? + found some "goodies"
Message-ID: <C6EzMB.F3v@ecf.toronto.edu>
Organization: University of Toronto, Engineering Computing Facility
References: <10474@blue.cis.pitt.edu>
Distribution: comp.robotics
Date: Sun, 2 May 1993 19:32:34 GMT
Lines: 15

I and a couple of my classmates tried using ultrasonics for an U/W robot
design for school last year. Your right, the echoing problems are enormous,
unless you use a well focused transmitter/receiver pair. We finally got it
to work, but not very well.
If you're looking for up/down position sensing, you might try a pressure
transducer. I know there was a design team here that built a miniature
submarine using pressure transducers and got pretty accurate results.

Aviv

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