基于LabVIEW的心音多功能分析仪

基于LabVIEW开发了一种集心音的采集、多功能处理和心音信号发生器于一体的心音分析仪。该仪器是在普通PC机上开发,使用自制的无线心音采集装置和心音信号采集子系统配合提取心音信号,然后利用小波去噪子系统清除背景噪声,最后可利用时域分析子系统和频域分析子系统对心音信号进行各种分析。心音信号发生器子系统可以根据需要产生一种合成心音信号,供用户学习使用。为使仪器达到最佳使用效果,已经为每一个功能模块中的参数寻找到最佳值并设为默认值,而且每一个参数都是可调节的。实际使用效果证明该仪器能够采集到清晰的心音信号,能有效去除干扰噪声,快速准确地计算出心音的各个特征值,能根据用户参数设置快速生成相应的心音信号并播放。

Heart Sound Multifunctional Analysis Instrument Based on LabVIEW

A set of collecting heart sound,multi-function process on heart sound and heart sounds signal generator in the heart sound analysis instrument based on the LabVIEW is devised.There are five subsystems in this instrument:heart sound collecting subsystem,wavelet de-noise subsystem,time domain analysis subsystem,frequency domain analysis subsystem and heart sound generation subsystem.The instrument is developed in PC.It uses a homemade wireless heart sounds collecting device and heart sounds signal collecting subsystem to get heart sound signals,then uses wavelet de-noising subsystem to remove background noise,finally uses time-domain analysis subsystem and frequency domain analysis sub-system to analyze the heart sounds signals.Heart sounds signal generator subsystems can produce a synthetic heart sounds signal if users need it.The parameters setting are also discussed for each subsystem.All the parameters can be set by user and the best ones are default values so that the instrument can fit other environment.The running test of this instrument shows that it can collect vivid heart sound signal,reduce noise effectively,computer the characteristic values,generate and play heart sound precisely.