High-frequency isolation impedance detection method and system

Abstract

The invention relates to a high-frequency isolation impedance detection method comprising the following steps of: S1, isolating an output voltage signal from an output current signal by using a voltage and current proportional mutual inductor; S2, converting the output voltage signal and the output current signal into a corresponding voltage effective value and a corresponding current effective value respectively by using an effective value conversion circuit; S3, performing analog-to-digital conversion and sampling on the voltage effective value and the current effective value by using a 16-bit analog-to-digital converter, and transmitting sampled data to a single-chip microcomputer by using a digital isolation chip; and S4, computing the sampled data by using the single-chip microcomputer to obtain an impedance value. The high-frequency isolation impedance detection method may accurately and effectively acquire the voltage value and the current value of power output and provides a reliable basis for impedance computation. Further, a circuit employs an isolated acquisition portion so as to be prevented from being interfered with by the fluctuation of an external power supply. The invention also discloses a high-frequency isolation impedance detection system.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a high-frequency isolation impedance detection method and system. Background technique [0002] At present, the impedance change of medical high-frequency treatment equipment is the basis for doctors to judge the ablation effect, and the percentage of impedance drop rate before and after ablation is used to judge whether the ablation meets the requirements. The accuracy of the impedance measurement is directly related to the therapeutic effect of the surgery, as the temperature of the tissue increases, its impedance decreases, however if the tissue is overheated, it can dehydrate and its impedance can increase, which is very unfavorable for the patient, Real-time and accurate observation of impedance is very necessary. Contents of the invention [0003] The technical problem to be solved by the present invention is how to provide a high-frequency isolation impedance de...

AI Technical Summary

Problems solved by technology

The accuracy of the impedance measurement is directly related to the therapeutic effect of the surgery, as the temperature of the tissue increases, its impedance decreases, however, if the tissue is overheated, it can dehydrate and its impedance can increase, which is very unfavorable for the patient, Real-time and accurate observation of impedance is very necessary

Images