基于STM32单片机的蓝牙听诊系统设计

Design of Bluetooth auscultation system based on STM32 Micro Control Unit

目的:为解决传统听诊器存在距离限制、在高噪声或严重病变情况下无法准确确定心音信号的起始位置等问题,设计一种蓝牙听诊系统。方法:该系统主要包括手持设备端(下位机)、个人计算机或蓝牙耳机设备(上位机)。其中手持设备端以STM32F103C8单片机为核心,主要包括心音信号采集单元、心电信号采集单元和蓝牙传输单元。手持设备端的软件采用嵌入式系统uC/OS Ⅱ控制调配各任务线程;上位机端软件基于MATLAB和C#平台设计,实现信号存储、显示及基本的数字信号分析。结果:经验证,采用该系统采集的健康志愿者的心音信号成分清晰,采集的患者志愿者的心音信号中心音几乎被湮没,信号中存在大量病变杂音。结论:该蓝牙听诊系统可实现对心音信号的采集、处理及分析,进一步优化后有望应用于日常医疗、军事卫勤、公共卫生、心音听诊教学等多个领域。

Objective To design a Bluetooth auscultation system to solve the problems of the traditional stethoscope in determining the starting position of heart sound signals due to long distance,high noises or serious diseases.Methods The Bluetooth auscultation system was mainly composed of a handheld terminal(lower unit)and a personal computer or Bluetooth headset(upper unit).The handheld terminal had a STM32F103C8 Micro Control Unit as its core unit and consisted of a heart sound signal acquisition unit,an ECG signal acquisition unit and a Bluetooth transmission unit,which had all the task threads arranged with a uC/OSⅡembedded system;the upper unit used MATLAB and C#platform to realize signal storage and display and basic analysis of digital signals.Results Among the heart sound signals acquired with the system,the signals from health volunteers had clear components and the signals from patient volunteers were almost obliterated by heart murmurs.Conclusion The Bluetooth auscultation system realizes acquisition,processing and analysis of heart sound signals,which can be applied in the fields of daily medical treatment,military medical service support,public health care and heart sound auscultation teaching after further optimization.