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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Thu, 18 Mar 2004 15:19:10 GMT
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Viewed:
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1303 times
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Hi, I own the 24Khz from Mindsensors. I have not played with it a lot, mainly
because I cannot get useful behavoiur. The device works nearly as a binary
detector, object present in xxx meter or no object. Minimum distance is around
30 and max about 1.5 m or so. (Speaking from the memory, I cannot find my notes
with real measures). It cannot be used to measure distances and its behaviour is
far away from a linear system.
In the RCX side the sensor has to be configured as a light sensor, and doesn't
need charge time.
If someone has achieved better results with this sensor, please let us know.
The sensor is not great stuff but it's cheap.
Bye.
In lugnet.robotics, Henrik Johansson wrote:
> In lugnet.robotics, Brian Davis wrote:
> > I've been looking at ultrasonic sensors for the RCX - two seem currently
> > availible, the 24 kHz one from Mindsensors, and the 40 kHz one from HiTechnic.
> > What experience do people have with these, specificly? I suspect they wouldn't
> > interfere with each other, but I'm unsure of how well they will detect different
> > size targets. Anybody have personal stories? What is the refresh rate on either
> > sensors (3 ms? 30 ms? more?). What is the minimum size (I'm assuming angular
> > here) detectable (ie - does the frequency make a difference? Is it something
> > else)? How stable are the readings (variation with a fixed target at fixed
> > distance? What happens when you tilt/rotate the target)?
> > Anybody have advice here? Testimonials?
>
> I have no personla experiance of any ultrasonic range sensors (still waiting for
> my sensor from HiTechnic). But I found this extensive test of the HiTechic
> sensor.
>
> http://www.cs.brown.edu/people/tld/courses/cs148/02/sonar.html
>
> /Henrik
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Message has 1 Reply:
 | | Re: Ultrasonic sensors - comparison & performance?
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| (...) Most of my results from the HiTechnic sensor were the opposite of this. I find it to be very useful, so I use it all the time. The readings seem to show a good, linear output based on the distance. (even though I usually use it as a binary (...) (21 years ago, 18-Mar-04, to lugnet.robotics)
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