Incremental rotary encoder for measuring horizontal or vertical angles
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United States of America Patent
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Oct 16, 2001
Grant Date -
N/A
app pub date -
Apr 27, 2000
filing date -
Apr 28, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An incremental rotary encoder outputs two sine wave signals having a phase difference of 90 degrees when the incremental rotary encoder is in operation, the incremental rotary encoder including a binary coding circuit which codes each of the two sine wave signals into a binary signal, a voltage detector which detects the voltage of one of the two sine wave signals at the moment of variation in a signal level of the binary signal, and a controller which includes a calculator which takes an even number of voltage values from each of the two sine wave signals to take an average of the even number of voltage values for each of the two sine wave signals.
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