Method and system for searching acoustic resonant frequency of ultrasonic knife and ultrasonic knife

Abstract

The invention relates to a method and a system for searching acoustic resonant frequency of an ultrasonic knife and the ultrasonic knife. The method comprises the following steps: controlling a current excitation signal to be input into two ends of an ultrasonic acoustic system, and obtaining a corresponding feedback voltage peak signal; obtaining a corresponding initial voltage envelope curve according to the feedback voltage peak signal, and processing the initial voltage envelope curve to obtain a smooth fitting voltage envelope curve; obtaining the resonant frequency according to the obtained fitting voltage envelope curve, and detecting the normality of the obtained resonant frequency; and when the resonant frequency is detected to be a normal resonant frequency point, judging that the normal resonant frequency point is a correct frequency search frequency parameter. According to the invention, the problems that the frequency searching speed is low, errors are easy to occur, and damage is possibly brought to equipment and patients when an equal-step-length frequency searching algorithm is adopted in the related technology can be solved.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a method and system for searching the acoustic resonance frequency of an ultrasonic knife and the ultrasonic knife. Background technique [0002] In the ultrasonic soft tissue cutting and hemostasis system (referred to as the ultrasonic knife), the ultrasonic transducer and the ultrasonic knife head form an ultrasonic acoustic system with an intrinsic resonant frequency. The host searches and tracks the resonant frequency of the ultrasonic acoustic system in real time through excitation and feedback electrical signals. And adjust the output electrical signal in time, so that the front-end acoustic system (referring to the front end of the ultrasonic cutter head (cutter head and clamp, tissue pad)) is in a perfect resonance state, which can achieve efficient cutting and hemostasis. [0003] In actual clinical application, because the soft tissue processed by the front en...

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Problems solved by technology

[0004] The invention provides a search method, system and ultrasonic knife for the acoustic resonance frequency of an ultrasonic knife, which can solve the problem of slow frequency search speed and error-prone, which may cause damage to equipment and patients in related technologies. The problem

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