Newsgroups: comp.robotics
From: SBRADLEY@armstrng.demon.co.uk (Simon Bradley)
Path: cantaloupe.srv.cs.cmu.edu!das-news2.harvard.edu!fas-news.harvard.edu!newspump.wustl.edu!news.ecn.bgu.edu!willis.cis.uab.edu!gatech!swrinde!pipex!peernews.demon.co.uk!armstrng.demon.co.uk!SBRADLEY
Subject: Light Curtain
Organization: Armstrong Projects Ltd
Reply-To: SBRADLEY@armstrng.demon.co.uk
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Date: Mon, 13 Mar 1995 16:18:44 +0000
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Hope someone out there can help me...

We are building a rehabilitation robot that deals with books, general paper
handling, etc.. I need a way of preventing a user from entering the working
envelope of the robot, or at least stopping the robot safely in the event of
an intrusion. 

I thought of using an array of led pairs on two poles but am starting to
look at ultra-sound. Can anybody point me to some work, if any exists, on 
ultra-sound light curtains?

Thanks in anticipation...

Simon
__________________________
Armstrong Projects Limited        voice  : +44 1494 680665
                                  fax    : +44 1494 680998
__________________________        email  : sbradley@armstrng.demon.co.uk
