Electronic stethoscope based on dual controllers

Abstract

The invention discloses an electronic stethoscope based on double controllers. The electronic stethoscope comprises a heart sound probe and a signal conditioning circuit. Heart sound signals collected in real time are conditioned by the signal conditioning circuit to be then input in a master control module, in the master control module, the conditioned heart sound signals are converted by an A / D converter to be input in a comparator, the converted heart sound signals are compared with given heart sound signals through the comparator, comparative results are output to the PID controller or the fuzzy controller, the PID controller or the fuzzy controller conducts control processing on the comparative results and outputs the comparative results to obtain true output heart sound signals, and the true output heart sound signals simultaneously serve as the given heart sound signals to be returned to the comparator. According to the electronic stethoscope, interaction control processing is carried out on the collected heart sound signals in three control modes, the accurate heart sound signals capable of reflecting heart sound characteristics in real time can be obtained, noise and distortion signals in the heart sound signals can be truly reflected, and accurate diagnostic messages can be provided.

Description

technical field [0001] The invention relates to the field of medical diagnosis equipment, in particular to an electronic stethoscope based on dual controllers. Background technique [0002] Heart sounds are a reflection of the mechanical movement of the heart and great blood vessels, and heart sound auscultation is one of the most basic methods for doctors to evaluate the state of heart function. Although there are already electrocardiogram (ECG) measurement, ultrasound detection and other inspection methods, heart sound auscultation is safe and low cost, and when the cardiovascular disease has not developed enough to produce other symptoms (such as ECG abnormalities), the murmur and distortion in the heart sound Therefore, heart sound auscultation is an important means of evaluating cardiovascular diseases, especially valvular heart disease, congenital heart disease and arrhythmia. [0003] The traditional heart sound stethoscope consists of a listening head, a rubber tube...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency in the prior art that the noise and distortion information in the heart sound cannot be detected, and provide a kind of electronic stethoscope based on dual controllers, which uses a PID controller and a fuzzy controller to realize the heart sound Noise and distortion information detection

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