基于LabVIEW的心音信号采集与小波去噪系统的实验研究

Experiment on system of signal collecting and wavelet denoising of heart sound based on LabVIEW

利用数据采集卡构建的数据采集系统一般价格昂贵且难以与实际要求完全匹配。介绍了一种基于LabVIEW和声卡的心音信号采集系统,并通过调用LabVIEW中的MATLAB Script节点对信号进行了小波去噪。该方法具有实现简单、界面友好、性能稳定、经济、功能较强等特点,适合心音信号的实验性研究,并为低成本下构建数据采集系统提供了一种思路。通过与数学软件MATLAB的结合使用,很好地补充了LabVIEW的开发功能,大大的拓宽虚拟仪器的开发范围。

The data acquisition system based on data acquisition card is generally expensive and difficult to totally meet with the actual demand.In this paper,a kind of acquisiton system of heart sound signal based on LabVIEW and sound card is established.And the signal is made wavelet denoising by calling MATLAB Script in LabVIEW.The method is characterized by being simple carry out,friendly interface,stable performance,economical,strong function and suitable for experiment on heart sound.It offers a kind of DAQ solution with low cost.By using MATLAB of mathematical software,it can fully replenish the development function of LabVIEW and widen the development scope of VI.