Subject:
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Re: Sharp analog distance sensor
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 22 May 2000 08:20:42 GMT
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Viewed:
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933 times
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Adam Oliver wrote:
>
> Greetings,
>
> I've looked, but don't seem to be able to find any relevant info.
I created a website at:
http://condor.informatik.uni-oldenburg.de/stueker/GP2D12
I will have to add some new experiences.
1. You definetely should use the device vertical (my choice: Emitter at
bottom). I have no clue, how anybody got reliable results when
mounting it
horizontal. There is no helpful information on Sharp's datasheet, so
I made my own meassurements and was surprised, that when mounting the
sensor horizontal, the minimal distance was not detected in the
middle
of the apex angle (hope this is the correct English word). The result
was the same for three devices!
2. I expected to detect obstacles in a distance upto 80cm.
Unfortunately, a
reliable detection does only seem to be possible in range of 60cm.
Farther
obstacles can not be clearly differentiated from sensor noise.
3. Depending on the needed accurancy it seem to be useful to amplify the
Sensor voltage.
4. I experienced, that there seem to be diffractions on edges of
obstacles.
The result is that the edges of obstacles seem closer than they
really
are (effect is noticeable around 40-50cm distance). I have to add
some
excel-sheets to the website, to point this out. [Has anybody made
this
experience before?]
Hope this helps.
Dirk
--
==================================================================
Dirk Stueker Zietenstr. 36 26131 Oldenburg Germany
Department of Computer Science University of Oldenburg
Tel. & Fax: +49 / 441 / 5 39 35 Mobile: +49 / 175 / 4 000 294
------------------------------------------------------------------
Homepage: www.stueker-online.de Email: dirk@stueker-online.de
==================================================================
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Message has 1 Reply:
Message is in Reply To:
 | | Sharp analog distance sensor
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| Greetings, I've looked, but don't seem to be able to find any relevant info. How does one hook up one of these beasts to the handyboard? I remember reading something somewhere that a track needs to be cut to do this - something I would like to avoid (...) (25 years ago, 20-May-00, to lugnet.robotics.handyboard)
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