A tuning method for ultrasonic handle in phacoemulsification apparatus

Abstract

The invention discloses an ultrasonic handle tuning method for a cataract ultrasonic emulsification instrument. In the tuning method, an ultrasonic handle in a cataract ultrasonic emulsification instrument is tuned through the amplitude frequency characteristics of a resonant network; the resonant network is composed of a first switching tube, a second switching tube, a not gate, an output transformer, a matching inductor and the ultrasonic handle; a CPU (Central Processing Unit) outputs a frequency signal to carry out frequency sweeping on the resonant network, the direct current power supply at both ends of the resonant network is monitored by an A / D (Analog to Digital) converter, and the frequency corresponding to the minimum voltage value of the direct current power supply is the initial resonant frequency output by the CPU; and in the working process of the ultrasonic handle, the minimum voltage value of the direct current power supply is tracked so as to track the resonant frequency of the ultrasonic handle. The invention also discloses a process for tracking the resonant frequency of the ultrasonic handle. The invention has the advantages of high anti-jamming capability, large tracking range and easy implementation.

Description

technical field [0001] The invention relates to a tuning system for ultrasonic surgical equipment, in particular to a tuning system for an ultrasonic handle in a cataract phacoemulsification apparatus. Background technique [0002] The phacoemulsification instrument uses the vibration of the tip of the phacoemulsification handle to break up the cloudy lens tissue and emulsify it. In the state of resonance, the vibration of the tip of the phacoemulsification handle is the strongest and the output efficiency is the highest. Therefore, the resonance of the phacoemulsification handle is an important condition for the realization of the phacoemulsification function. The resonant frequency of the phacoemulsification handle will change with changes in temperature, load conditions and other factors. Tracking the resonant frequency and maintaining the resonance of the phacoemulsification handle are the prerequisites for stable output of ultrasonic power. [0003] The equivalent impe...

AI Technical Summary

Problems solved by technology

Using the above method for tuning and frequency tracking, although its principle is very clear, the realization needs to go through the process of sampling, filtering, phase detection, integration, voltage control oscillation, etc. In addition to the complex structure, occasional interference may cause detuning. Therefore, the anti-interference ability is weak, and its tracking range and capture range are limited

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