公开(公告)号：US20230182172A1

公开(公告)日：2023-06-15

申请号：US18167535

申请日：2023-02-10

Applicant: Olympus Corporation

Inventor： Gen Kato ,  Shunsuke MATSUI ,  Ko KAWASIMA

IPC: B06B1/06 ,  A61B17/32

CPC classification number: B06B1/06 ,  A61B17/320092 ,  A61B2017/00473

Abstract: A method of actuating an ultrasonic drive device includes sweeping, by a first control circuit, a frequency at which an ultrasonic transducer oscillates from a predetermined frequency toward a resonant frequency, predicting, by a prediction circuit, whether or not ringing occurs based on a first parameter representing a driving state of the ultrasonic transducer, and if the prediction circuit predicts that the ringing does not occur and if a second parameter representing a frequency at which the ultrasonic transducer is driven satisfies a predetermined condition, resonantly driving, by a second control circuit, the ultrasonic transducer at a resonant frequency by PLL control.