Subject:
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Re: Direction of rotation sensor.
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 21 Jan 1999 03:53:52 GMT
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Viewed:
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1816 times
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Nicolas Oriol writes:
> Hi,
> with no particular reason (YET) I'm trying to build a sensor that is
> able to find out the direction of rotation of a given shaft without
> adding significant load to it.
> It must use ONLY ONE touch sensor and ONLY RIS basic set parts.
Here's a thought:
A rubber band around the axle to check and a pulley with a peg in it.
In one direction, the pulley/peg run into the touch sensor and the band
then starts slipping on the axle (hopefully geared down enough to
sufficiently push the touch sensor). In the other direction, the pulley/peg
runs into a brick and stops. You would have to put the two stopping
positions rather close together for the reaction time to be small.
This one's not exactly what you want. Has anyone tried this?:
Draw (via your favorite paint program) a circular pattern which increases
in greyscale shading as theta increases. Print this out, paste it to a
pulley, and aim a light sensor at it. This _should_ be a convenient
rotation sensor for those of us stuck with just a light sensor, with
potentially higher resolution than the standard sensor. It would require
a powerful programming language to manage it, though (more powerful than
stock RCX programming).
--Jim
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Message has 1 Reply:
 | | Re: Direction of rotation sensor.
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| Hi , (...) Using this idea, a quick and much simpler design than my first one works better. :) I have to work on it because I want the sensor to be really "sensible" to changes in direction but I think this is a nice an simple path to follow. (...) (...) (26 years ago, 21-Jan-99, to lugnet.robotics)
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Message is in Reply To:
| | Direction of rotation sensor.
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| Hi, with no particular reason (YET) I'm trying to build a sensor that is able to find out the direction of rotation of a given shaft without adding significant load to it. It must use ONLY ONE touch sensor and ONLY RIS basic set parts. My initial (...) (26 years ago, 20-Jan-99, to lugnet.robotics)
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