【摘要】 介绍了一种基于通用串行总线(USB)接口的心音信号采集、分析和处理系统。该系统包括高性能的心音传感器、预处理电路、A/D转换电路和与PC机通信的USB高速接口电路。心音信号经过传感器采集,通过预处理电路的放大、滤波,再经过A/D转换电路送到单片机,单片机把现场采集到的数据及时可靠地传递给PC机。通过实验表明,该系统能无创、快速、廉价和客观量化地对心血管病人和健康人的心肌收缩能力进行检测和评估,并为心力储备的评估提供了一个可靠的技术平台。更多还原

【Abstract】 This paper introduces a type of heart sound recording, analysis and processing system based on USB interface. The system consists of high performance sensor sampling heart sounds, the preprocessing circuit, the A/ D conversion module and the USB based high-speed computer communications interface. The experiments show that it is noninvasive, convenient, inexpensive and rapid in detecting the cardiac contractility of patients with heart disease as well as of healthy subjects. This system has provided a reliable technical platform for evaluating the cardiac contractility reserve.更多还原