Control device and method for controlling a piezoelectric drive device using phase difference
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United States of America Patent
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Aug 9, 2022
Grant Date -
Apr 4, 2019
app pub date -
Sep 28, 2018
filing date -
Sep 29, 2017
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Abstract
A control device of a piezoelectric drive device includes a drive pulse signal generation unit that generates a binary drive pulse signal, a drive signal generation unit that generates a drive signal which is applied to the piezoelectric element for drive from the drive pulse signal, a detection pulse signal generation unit that generates a detection pulse signal by binarizing the detection signal which is output from the piezoelectric element for detection, and a phase difference acquisition unit that acquires a phase difference between the drive pulse signal and the detection pulse signal, based on a rising edge and a falling edge of the drive pulse signal and a rising edge and a falling edge of the detection pulse signal.
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