Subject:
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Polaroid sonar problems
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 1 Mar 1999 09:15:34 GMT
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Original-From:
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Guy & Gad Berg <[gberg@netvision.net.il]Spamcake[]>
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Viewed:
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824 times
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hi!
Our group is still struggling with the polaroid sonar. We can't get any
coherent reading, only readings that are in the range 470-515, which
aren't effected by the measured distance.
We have the capacitor and resistor installed as required.
We tried using a 150ms delay (instead of 50) and we average our
readings, we tried taking every tenth reading and displaying it, but
nothing seems to work.
We know there are people out there who have succeeded! PLEASE, tell us
what you did.
Thanks.
Guy.
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Message has 2 Replies:
 | | Re: Polaroid sonar problems
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| (...) I assume that your sonar pings (makes a clicking sound). If so, then you may be getting a premature echo. You might try mounting the transducer in putty to absorb vibration. You could try lengthening the blanking interval to make sure that the (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
| | | RE: Polaroid sonar problems
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| I also found that my neon light in my magnifying lens lamp caused erroneous readings. When I turned it off or moved it away the readings normalized (gave the correct results). Shielding wasn't effective in this instance. I did completely away with (...) (26 years ago, 2-Mar-99, to lugnet.robotics.handyboard)
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