A Dynamic Impedance Feedback Method for Ultrasonic Osteotomy

Abstract

The present invention relates to the technical field of ultrasonic osteotome dynamic impedance feedback, and discloses a method for dynamic impedance feedback of ultrasonic osteotome. The specific circuit includes a main power supply, an HMI human-computer interaction module, an MCU, a numerical control excitation power supply, a matching inductor and a matching capacitor. Matching circuit, resistance-capacitance voltage divider circuit and sampling circuit composed of Hall sensors, gain amplifier circuit, band-pass filter circuit, level adjustment circuit, input amplitude and phase detection and low-pass filter circuit, RMS true effective value circuit. The present invention adopts the resistance-capacitance circuit to divide the voltage and the sampling of the Hall sensor, so that the interference of the sampling original signal is reduced, and no additional components are connected in series with the matching circuit, so the collected original signal is more accurate, and the signal processing circuit is ensured. The signal accuracy reduces the drift error, and a band-pass filter circuit is introduced to make the final signal more accurate and cleaner, and the corrected resonance frequency is calculated by the PID algorithm of the error, and the frequency tracking speed is faster.

Description

technical field [0001] The invention relates to the technical field of ultrasonic osteotome dynamic impedance feedback, in particular to an ultrasonic osteotome dynamic impedance feedback method. Background technique [0002] At present, with the application of ultrasound in the medical industry is becoming more and more popular, in the actual clinical use and treatment of ultrasonic bone knife, if the piezoelectric ultrasonic transducer of the bone knife has a tuning mismatch, it will directly affect the clinical diagnosis. Accuracy, but also the conversion efficiency of electrical energy to mechanical energy is reduced, and the bone knife handle is heated, which in turn causes many problems such as wasting electric energy and shortening the life of the ultrasonic bone knife. [0003] Impedance matching is a bridge for energy transmission and conversion between electrical energy and mechanical energy. It has the functions of tuning and variable resistance. Now commonly used...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a dynamic impedance feedback method for ultrasonic osteotome to solve the problem of how to quickly and accurately measure and evaluate the state of impedance matching of the piezoelectric ultrasonic transducer of the medical ultrasonic osteotome proposed in the above background technology , and the quantitative adjustment of the tuning frequency

Images