Moving body detector
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United States of America Patent
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Nov 17, 2015
Grant Date -
Aug 28, 2014
app pub date -
Sep 24, 2012
filing date -
Oct 4, 2011
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Abstract
In a malfunction detection mode, a controller is configured to compare an output of a phase-detector obtained when controlling to input an oscillation signal to only the phase-detector, with an output of the phase-detector obtained when controlling to input the oscillation signal to both of a transmitter and the phase-detector. If a change (difference) of signal levels of the outputs is equal to or more than a prescribed threshold, the controller determines that there is no malfunction in the transmitter and a receiver. If the change of the signal levels is less than the prescribed threshold, the controller determines that there is a malfunction in the transmitter or the receiver.
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