Subject:
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Re: Ultrasonic sensors - comparison & performance?
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 6 Apr 2004 17:50:04 GMT
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Viewed:
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1258 times
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John Barnes wrote:
> Air movement at right angles to the beam will cause
> the beam path out and back to have to be curved, increasing
> tha apparent distance with increasing airspeed. (yes you can
> make air movement sensors using this kind of technology :)
How sensitive can you get this way? Specificly I'm thinking of having the
sensor looking down a long "hallway" with airflow directed toward or away from
the sensor (this too should result in a differing time-of-flight, yes?).
--
Brian Davis
(who is coming up with a lot of uses for a sensor he hasn't ordered... yet)
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Message has 1 Reply:
 | | Re: Ultrasonic sensors - comparison & performance?
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| (...) Yes, this should work, but you won't be able to measure the direction of the wind, just it's velocity. But then this isn't different from the cross-wind situation either. Remember velocity=distance/time (v=d/t). The way to measure wind speed (...) (20 years ago, 6-Apr-04, to lugnet.robotics)
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Message is in Reply To:
| | Re: Ultrasonic sensors - comparison & performance?
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| (...) I cannot provide any comparison information because I think it would be improper of me to do so. I would like to set out a couple of technical details relating to distance measurement using ultrasonic techniques, since I have been involved in (...) (21 years ago, 18-Mar-04, to lugnet.robotics)
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