摘要
该文介绍了一种便携式心音信号记录仪的研究与实现。该方案采用有源模拟滤波器将环境噪声从心音信号中滤除,提取心音的实时数据,通过DSPIC芯片的内部AD模块将心音信号数字化和信号处理。固件程序将数字化的心音信号以FAT32文件系统格式写入SD卡保存。上位机软件采用LabVIEW软件编写,软件将保存在SD卡中的心音时域数据回显。医生可以根据心音的时域图再做进一步的分析和判断。该方案可以捕获随机的心音异常,提升了心音听诊诊断的效果。具有较好的市场价值。
In this paper, we describe and design a portable heart sound recorder. The program in this paper filters the environmental noise out by the active analog fiher and extracts the real-time data of heart sound. By the use of the AD module in the DSPIC chip, we digitize the heart sound and process it. The firmware records the heart sound in FAT32 file system format into a SD card. The software in PC written by LabVIEW traces the heart sound stored in the SD card in the time domain. According to the time domain graph of heart sound doctor can do further analysis and judgment. This design solution has good market value as it can improve the diagnostic effect with its ability of capturing random abnormal heart sound
出处
《杭州电子科技大学学报（自然科学版）》
2011年第4期94-97,共4页
Journal of Hangzhou Dianzi University：Natural Sciences
基金
浙江省重大专项资助项目(GK100910002)
关键词
心音听诊
心音记录仪
有源滤波器
heart souud auscultation
heart sound recorder
active filter
