Control Device Of Piezoelectric Drive Device And Control Method Of Piezoelectric Drive Device
AssigneeSeiko Epson Corporation
InventorKiichi KAJINO
Life of this patent
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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.
Claims16
A control device of a piezoelectric drive device including a vibration body that includes a piezoelectric element for drive and a piezoelectric element for detection, vibrates according to drive of the piezoelectric element for drive, and outputs a detection signal according to the vibration from the piezoelectric element for detection, the control device comprising:
- 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.
A control device of a piezoelectric drive device including a vibration body that includes a piezoelectric element for drive and a piezoelectric element for detection, vibrates according to drive of the piezoelectric element for drive, and outputs a detection signal according to the vibration from the piezoelectric element for detection, the control device comprising:
- 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 duty of the drive pulse signal, a rising edge or a falling edge of the drive pulse signal, and a rising edge or a falling edge of the detection pulse signal.
A control device of a piezoelectric drive device including a vibration body that includes a piezoelectric element for drive and a piezoelectric element for detection, vibrates according to drive of the piezoelectric element for drive, and outputs a detection signal according to the vibration from the piezoelectric element for detection, the control device comprising:
- 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 monitor pulse signal generation unit that generates a monitor pulse signal by binarizing the drive 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 monitor pulse signal and a rising edge and a falling edge of the detection pulse signal.
A control method of a piezoelectric drive device including a vibration body that includes a piezoelectric element for drive and a piezoelectric element for detection, vibrates according to drive of the piezoelectric element for drive, and outputs a detection signal according to the vibration from the piezoelectric element for detection, the control method comprising:
- generating a binary drive pulse signal;
- generating a drive signal which is applied to the piezoelectric element for drive from the drive pulse signal;
- generating a detection pulse signal by binarizing the detection signal which is output from the piezoelectric element for detection;
- and
- acquiring 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.
A control method of a piezoelectric drive device including a vibration body that includes a piezoelectric element for drive and a piezoelectric element for detection, vibrates according to drive of the piezoelectric element for drive, and outputs a detection signal according to the vibration from the piezoelectric element for detection, the control method comprising:
- generating a binary drive pulse signal;
- generating a drive signal which is applied to the piezoelectric element for drive from the drive pulse signal;
- generating a detection pulse signal by binarizing the detection signal which is output from the piezoelectric element for detection;
- and
- acquiring a phase difference between the drive pulse signal and the detection pulse signal, based on a duty of the drive pulse signal, a rising edge or a falling edge of the drive pulse signal, and a rising edge or a falling edge of the detection pulse signal.
A control method of a piezoelectric drive device including a vibration body that includes a piezoelectric element for drive and a piezoelectric element for detection, vibrates according to drive of the piezoelectric element for drive, and outputs a detection signal according to the vibration from the piezoelectric element for detection, the control method comprising:
- generating a binary drive pulse signal;
- generating a drive signal which is applied to the piezoelectric element for drive from the drive pulse signal;
- generating a monitor pulse signal by binarizing the drive signal;
- generating a detection pulse signal by binarizing the detection signal which is output from the piezoelectric element for detection;
- and
- acquiring a phase difference between the drive pulse signal and the detection pulse signal, based on a rising edge and a falling edge of the monitor pulse signal and a rising edge and a falling edge of the detection pulse signal.
Dependencies are inferred from the claim text.