Subject:
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Re: NXT Ultrasonic sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 6 Sep 2006 19:18:25 GMT
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Original-From:
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Juergen Stuber <JUERGEN@JSTUBER.nospamNET>
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Viewed:
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2563 times
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Hi,
"Brian Davis" <brdavis@iusb.edu> writes:
> In lugnet.robotics, Ben Ventura wrote:
>
> > How long does it take to for it to sample each
> > distance reading?
>
> IMS, it takes about 12 ms per "ping" from the sensor.
since sound travels at about 333 m/s (depending on temperature and pressure),
a meter takes 3 milliseconds.
At the maximum range of 2.5 meters,
times two that would be 15 milliseconds per reading.
Cheers
Jürgen
--
Jürgen Stuber <juergen@jstuber.net>
http://www.jstuber.net/
gnupg key fingerprint = 2767 CA3C 5680 58BA 9A91 23D9 BED6 9A7A AF9E 68B4
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Message has 2 Replies:
 | | Re: NXT Ultrasonic sensor
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| (...) It never ceases to amaze me how astoundingly slow sound is compared to the speed of a computer. It's one of those rare cases when your view of the universe around you shifts into a completely new perspective. (18 years ago, 6-Sep-06, to lugnet.robotics)
| | | RE: NXT Ultrasonic sensor / Retreiving 8 OBjects at Once
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| (...) Unfortunately, you cannot operate a ultrasound sensor at this rate. I think it is much slower than this. Before you start a new "ping" you have to ensure that all the echoes from distant devices on first ping have been received before starting (...) (18 years ago, 6-Sep-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: NXT Ultrasonic sensor
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| (...) Well, sort of. First, what the US sensor returns is the range of the nearest sound-reflecting surface: but it's not a pencil thin laser beam of sound, so the same object might be detected at slightly different angles, making the object apeear (...) (18 years ago, 6-Sep-06, to lugnet.robotics)
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