Piezosurgery dynamic impedance feedback method

Abstract

The invention relates to the technical field of piezosurgery dynamic impedance feedback, and discloses a piezosurgery dynamic impedance feedback method, the specific circuit comprises a main power supply, an HMI human-computer interaction module, an MCU, a numerical control excitation power supply, a matching circuit consisting of a matching inductor and a matching capacitor, a sampling circuit composed of a resistance-capacitance voltage division circuit and a Hall sensor, a gain amplification circuit, a band-pass filter circuit, a level adjustment circuit, an in-amplitude phase detection andlow-pass filter circuit and a RMS true virtual value circuit. The resistance-capacitance circuit is adopted to divide voltage and sample the Hall sensor, so that the interference of the sampled original signal is reduced, no extra component is connected in series into the matching circuit, the acquired original signal is more accurate, the signal precision of the signal processing circuit is ensured, the drift error is reduced, the band-pass filter circuit is introduced, and the final signal is more accurate and cleaner, the corrected resonant frequency is calculated by adopting an error PIDalgorithm, and the frequency tracking speed is higher.

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...

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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

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