Subject:
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Re: Sonar and the handyboard
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 20 Mar 1997 18:19:53 GMT
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Original-From:
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Chuck McManis <cmcmanis@netcom.comSTOPSPAM>
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Reply-To:
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cmcmanis@netcom.+StopSpam+com
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Viewed:
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1638 times
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Tom Brusehaver wrote:
> All I get is 8". If I unplug it, I get 0".
Since 8" is the 'minimum' distance the board can see, I strongly
suspect that your transducer isn't sufficiently damped. This will
cause it to continue 'ringing' after the pulse is sent and when
the receiver switches on, its still vibrating so it sees that as
an echo. How is the transducer mounted?
Another possibility is that you are pulling 'blank inhibit' low
for some reason (you have to do this if you want to read closer
than the default for the board and so you never get the 'rest'
period where the transducer is settling down.
--Chuck
--
cmcmanis@netcom.com http://www.professionals.com/~cmcmanis
All opinions in the non-included text above are the sole opinions of
the author.
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Message has 1 Reply:
 | | Re: Sonar and the handyboard
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| (...) The one that is mounted is in a plastic box, glued in with silicon glue. The unmounted one was laying on my bench pointed at the ceiling. (...) I assume the 'blank inhibit' pin is BINH (docs are at home, I am at work), and that is connected to (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Re: Sonar and the handyboard
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| Hi, with all this talk of sonar, I thought I finally get to hooking mine up. All I get is 8". If I unplug it, I get 0". I'd swear I have it hooked up right. Someone sent out a mail earlier this week, and I had mine hooked up just like it said. I (...) (28 years ago, 20-Mar-97, to lugnet.robotics.handyboard)
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