System for ascertaining the number of revolutions of a rotationally mounted shaft, and method for ascertaining the number of revolutions of a rotationally mounted shaft
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United States of America Patent
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Oct 31, 2017
Issued Date -
N/A
app pub date -
Jun 17, 2013
filing date -
Jun 28, 2012
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Abstract
System for ascertaining the number of revolutions of a rotationally mounted shaft, and method for ascertaining the number of revolutions of a rotationally mounted shaft, a permanent magnet being connected to the shaft in a torsionally fixed manner, the signal voltage generated by a microgenerator situated in an operative connection with the permanent magnet being supplied to an energy buffer, especially via a rectifier to a capacitor, a memory device for storing the number of revolutions being supplied from the energy buffer, the signal voltage of the microgenerator in particular being supplied to a counting logic device, which is supplied from the energy buffer and is connected to the memory device for reading out the respective old numerical value of the revolutions and for storing the respective newly ascertained numerical value of the revolutions.
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