摘要
介绍了一种心音分析虚拟仪器的设计方案,为开发出适合个人在PC机上使用的心音分析仪器打下平台。该仪器以LabVIEW为开发平台,硬件以压控心音传感器和计算机自带声卡为基础,软件包含了心音采集、小波去噪、时域分析和频域分析等多个模块。为计算心跳频率和第一心音与第二心音之间的时间间隔,采用了提取心音包络、归一化和分段平均相结合的方法,提高了系统的容差能力和计算精度。该仪器实现了传统的心脏听诊从单一的"听"转变为可视、可听和多角度分析,可作为临床心脏诊断的辅助仪器。
Introduce a kind of heart sound analysis virtual instrument based on the platform of LabVIEW.Hardware consists of voltage-controlled sensor and the computer sound card.The software integrates three modules：heart sound collection,denoise by wavelet,analysis in time and frequency domains.By extracting the envelope of the heart sound first and then cut it into pieces to improve fault tolerance and accuracy,it also calculates the heart-beat frequency and the average interval of S1 and S2,which are quite important for the hear ausculate.At last,some practical examples are given to demonstrate the validity and the effectiveness of this instrument.Due to the visibility,audibility,stability and multi-analysis,this instrument can be used as an assistant implementation for heart auscultate.
出处
《计算机技术与发展》
2010年第11期217-220,共4页
Computer Technology and Development
基金
山东省自然基金项目(y2006G03
y2007G14
2007Jy17)
南京邮电大学基金项目(NY207139)
