We need to measure a rotational speed of the shaft diameter 1200 mm, and only the shaft surface is available for speed pick-up. Preferred output is 10000 PPR with full quadrature. The first idea was to use a magnetic band with incrementally coded scale (used in linear encoders), but how to make accurate joint to complete the circle? Or, maybe there are some other methods? Please advise.
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Large shaft speed measurement 4
- Thread starter thinker
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electricpete
Electrical
By the way when I used the term "sample" above I was referring to a pulse as a sample of speed or position. There is also the likelihood that a computer will be sampling the pulse output...that is another relevant "sampling" rate but a different useage of the term. In any case no matter how fast the digital sampling, you get at most one "sample" per pulse from which to compute the position and speed.
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