MEMS心音心电一体化听诊器信号采集与分析系统

MEMS Integrated Phonocardiography and Electrocardiography Signal Acquisition and Analysis System

摘要:

针对传统电子听诊器仅限于心音听诊，无法实现心音心电信号同步显示、回放和数据分析的功能；根据心音心电信号与MEMS心音心电一体化听诊器传感特点，设计了一种用于该传感器的同步采集与分析系统；该系统利用MEMS心音心电一体化传感器检测心音心电信号，以GD32微处理器和AD7606为核心控制器件实现心音心电信号的同步采集，软件上利用C#和MATLAB混合编程实现了心音心电信号波形的同步显示、历史回放以及频谱分析的功能；测试结果表明，该系统心音与心电通道的相位差在2.056°-3.235°之间，满足同步性要求；上位机软件能清晰显示心音与心电信号特征，同时心音信号的频域集中在20-600 Hz，心电信号的频域集中在0.05-100 Hz，验证了系统功能的准确性，为心血管疾病的早期筛查提供了技术支持。

Abstract:

Addressing the limitations of traditional electronic stethoscopes, which are restricted to heart sound auscultation and unable to provide synchronous display, playback, and data analysis of heart sound and electrocardiogram (ECG) signals, a synchronous acquisition and analysis system is designed for a MEMS integrated phonocardiography and electrocardiography sensor based on the characteristics of heart sound and ECG signals. The system utilizes the MEMS integrated sensor to detect heart sound and ECG signals, with the GD32 microprocessor and AD7606 serving as the core control components for synchronous acquisition of heart sound and ECG signals. Software-wise, a hybrid programming approach combining C# and MATLAB is employed to achieve synchronous waveform display, historical playback, and spectral analysis of heart sound and ECG signals. Test results demonstrate that the phase difference between the heart sound and ECG channels ranges from 2.056° to 3.235°, meeting the synchronization requirements. The upper computer software can clearly display the characteristics of heart sound and ECG signals, with the frequency domain of heart sound signals concentrated between 20-600 Hz and the frequency domain of ECG signals concentrated between 0.05-100 Hz, verifying the accuracy of the system's functionality. This system provides technical support for early screening of cardiovascular diseases.