Newsgroups: comp.robotics
Path: brunix!uunet!haven.umd.edu!darwin.sura.net!convex!convex!hattori
From: hattori@convex.com (Mato Hattori)
Subject: Re: ultrasonic ranging
Sender: usenet@news.eng.convex.com (news access account)
Message-ID: <hattori.717112336@convex.convex.com>
Date: Mon, 21 Sep 1992 21:52:16 GMT
References: <hb1nfph.nagle@netcom.com> <lbg6j0INN6m8@exodus.Eng.Sun.COM> <BuqC68.EFz@snuffy.wa.atk.com> <7000@tekig7.PEN.TEK.COM>
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Organization: Engineering, CONVEX Computer Corp., Richardson, Tx., USA
Keywords: array, ultrasonics, gerbils
X-Disclaimer: This message was written by a user at CONVEX Computer
              Corp. The opinions expressed are those of the user and
              not necessarily those of CONVEX.
Lines: 11

In <7000@tekig7.PEN.TEK.COM> mitchelr@tekig6.PEN.TEK.COM (Ryan James Mitchell) writes:
>	I have thought of an idea (probably not a new one) that is a combination
>of triangulation and image processing.  Using one transmitter and two    
>symmetrically spaced receivers, at 200khz at least, sample the two receivers
>into a computer.  ...          ^^^^^^^^^^^^^^^^^^^^^

As you know, when the frequensy of sound get higher, the reduction during
propagation will be bigger.  I think it's difficult to make a transmitter 
powerful enough to sens reflection with a receiver.  Do you have some idea
to make transmitter and receiver able to use 200KHz ?

