Subject:
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Re: FIber-optic rotation sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 22 Dec 1999 15:59:53 GMT
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Viewed:
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478 times
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It was not me to discover it, but it's definitely doable. You can use the
fiber-optic device as a rotation sensor and it works pretty well. As Dennis
and Phil said, the only point is that you cannot detect the direction, but
in many cases you already know it.
Mario
Web page: http://www.geocities.com/~marioferrari
LUGNET member page: http://www.lugnet.com/people/members/?m=22
Proud member of ItLUG: http://www.itlug.org
Phil Watt <wattsup1@earthlink.net> wrote :
> Dennis, You are absolute correct. No brain cell problems on this issue.
>
> I can't remember the part about Mario, but it makes sense..
>
> Jin Sato has used these on the front legs of his Mibo dog to determine • motion. He
> knows the direction that he is moving the motor, so the lack of direction
> information was "worked around" in software.
>
> -Phil
>
> Dennis Clark wrote:
>
> > In lugnet.robotics, David Paule writes:
> > > The fiber-optic device and a light sensor can be rigged to detect at • least two
> > > distinct rotation positions of an axle.
> > [snip]
> >
> > I believe it was Mario that described a way to use the FO device as a
> > rotation detection unit all by itself. Apparently as a side-effect of • the
> > rotation the FO device can toggle the pulse counter as well. It can't • detect
> > direction like the true rotational sensor, but it apparently can detect
> > rotation - counting clicks may then allow you to fix end-point stops.
> >
> > Does anyone else verify what I just said or is my memory shot?
> >
> > DLC
>
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Message has 1 Reply:
 | | Re: FIber-optic rotation sensor
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| Mario Ferrari wrote in message ... (...) I'm wondering, what is the resultant "resolution" (ie, counts per rotation) of the fibre-optic device? What sort of raw values does it return, as you rotate the axle? Iain -- tokama (URL) UIN 5362826 AIM (...) (25 years ago, 22-Dec-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: FIber-optic rotation sensor
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| Dennis, You are absolute correct. No brain cell problems on this issue. I can't remember the part about Mario, but it makes sense.. Jin Sato has used these on the front legs of his Mibo dog to determine motion. He knows the direction that he is (...) (25 years ago, 21-Dec-99, to lugnet.robotics)
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