Device for measuring the angular velocity or velocity of a moving part and for detecting the direction of motion of the moving part
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United States of America Patent
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Jan 24, 2017
Grant Date -
Jun 5, 2014
app pub date -
Jul 10, 2012
filing date -
Jul 11, 2011
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Abstract
Motion detection device consisting of a single encoder and a single stationary sensor element, the encoder, which is arranged on a movable part, representing an asymmetrical pattern. The angular velocity or velocity and the direction of motion of a moving part are determined from the sensor signal by measuring the edge steepness or the rise time or fall time, spectrally analyzing the frequency and the phase relation of a harmonic to the phase of the fundamental mode, or evaluating the asymmetries of a sequence of rectangular pulses.
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