心功能信号的同步采集与分析

Synchronous Acquisition and Analysis of Cardiac Function Signals

摘要: 长期以来，冠心病是心血管疾病致死的主要原因，且其发病率每年都在不断增加。基于心功能信号采集与分析的疾病无创诊断技术是生物医学工程领域的主要研究课题之一。本文选取心音和心电信号进行心功能状况分析。为了得到高质量的心功能信号，选用了高灵敏度的心音传感器。在电路设计中，充分考虑噪声的影响，实现了心电和多通道心音信号的同步采集，且电路仿真结果符合预期。在对心功能信号进行分析时，通过心电信号实现心音信号的分割，并采用小波散射变换提取心音信号的时频特征。通过对不同心音听诊区的分析，与单一心音信号相比，多通道心音信号在心血管疾病诊断方面更具优势。

Abstract: For a long time, coronary heart disease has been the leading cause of death from cardiovascular diseases, and its incidence rate has been continuously increasing every year. The non-invasive diagnostic technology for diseases based on the acquisition and analysis of cardiac function signals is one of the main research topics in the field of biomedical engineering. This paper selects heart sound and electrocardiogram (ECG) signals to analyze cardiac function status. To obtain high-quality cardiac function signals, high-sensitivity heart sound sensors were chosen. In the circuit design, the impact of noise was fully considered, achieving synchronous acquisition of ECG and multi-channel heart sound signals, with circuit simulation results meeting expectations. In the analysis of cardiac function signals, heart sound signals were segmented through ECG signals, and their time-frequency characteristics were extracted using wavelet scattering transform. Through the analysis of different heart sound auscultation areas, multi-channel heart sound signals were found to be more advantageous in diagnosing cardiovascular diseases compared to single-channel heart sound signals.