Signal processing device for rotation sensor
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United States of America Patent
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Mar 20, 2018
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N/A
app pub date -
Jun 27, 2014
filing date -
Aug 27, 2013
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Abstract
An instantaneous revolution speed Nm of an input shaft is calculated from an input period of a pulse signal from a revolution sensor, a revolution speed Nf is calculated by filter processing the instantaneous revolution speed Nm, a determination is made that a belt slip occurs when, during a stop of a vehicle, a state in which the revolution speed Nf is equal to or higher than a slip determination speed NSL is continued for a time equal to or longer than slip determination time TSL, and an immediately prior revolution speed Nf is held until a time of a pulse signal no input exceeds a road wheel lock corresponding time TWL which is longer than a slip determination time TSL.
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