Article View: comp.robotics
Article #1592Re: Getting narrow-beam range data
From: Willie Smith
Date: Fri, 07 Jun 1991 19:52
Date: Fri, 07 Jun 1991 19:52
19 lines
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1298 bytes
In article <77904@brunix.UUCP>, kjb@cs.brown.edu (Ken Basye) writes...
>We're looking for a way of getting a single range measurement in a
>particular direction. We have sonar, but the beam is far too wide.
[...]
>Ideally, we'd like something that has low power consumption, a 5-10
>degree cone (or less) and a range up to at least 4 meters, although it
>need not be very accurate (even +/- 10 cm would be OK).
What's wrong with sonar again? The Polaroid sensors have a beam width of
something like 12 degrees....
I called Polaroid the other day and they mentioned that the beamwidth is
approximately inversely proportional to transducer size, and one way to get
narrow beamwidths is to use arrays of transducers.
Willie Smith
smith@sndpit.enet.dec.com
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!decwrl!pa.dec.com!nntpd.lkg.dec.com!sousa!sndpit.enet.dec.com!smith From: smith@sndpit.enet.dec.com (Willie Smith) Newsgroups: comp.robotics Subject: Re: Getting narrow-beam range data Message-ID: <1290@sousa.ltn.dec.com> Date: 7 Jun 91 19:52:22 GMT Sender: newsa@sousa.ltn.dec.com Organization: Digital Equipment Corporation Lines: 19