基于嵌入式系统的便携式心音分析仪的研究

心音作为一种人体重要声信号，在心血管疾病研究中具有重要价值。本研究开发了一种基于嵌入式计算机、用于采集并分析心音信号（PCG）的便携式辅助诊断系统，实现了以下功能：心音及同步心音信号的双通道采集，准确实现心音定位；病人信息和心音数据的数据库管理；心音信号波形回放及声音回放。更为重要的是，该系统能对心音和心杂音进行能量和时频特性分析，获取心音信号的时频特征，对心脏病进行辅助诊断。该仪器体积小、成本低、使用灵活方便，特别是对一些因患心脏疾病而不方便行动的病人可实行床旁动态监护。

Study on heart sound analyzing instrument based on embedded system

As an important human body sound signal, heart sound is of great value in heart disease diagnosis. A potable heart sound analysis instrument based on embedded computer is designed, which has the following functions: two channel heart sound and synchronous ECG acquisition, database management for patient information and heart sound data, heart sound signal waveform and sound replay. More important, this system also performs energy and time-frequency domain analyses of the heart sound signal, acquires the time-frequency characteristics of the signal, and provides assistant diagnosis capability for heart diseases. The instrument features small size, low-cost and convenient to use, and can be used in bedside dynamic monitoring for heart disease patients with moving difficulty.