基于MyDAQ和LabVIEW的胎心音实验系统

目的：指出胎儿监护的重要性和通过检测胎心音实现胎儿监护的重要价值，设计一个胎心音实验平台，实现胎心音采集和性质分析。方法：首先依据WHO的调查，世界每年有数百万胎儿死亡，若孕妇在怀孕期间按周期做胎儿健康监护，则可以明显降低婴儿的死亡率，简述了胎儿健康监护的重要意义；然后比较多种胎儿监护方法，指出胎心音图法具有更重要的价值。最后论文分析了胎心音的产生和基本特点，基于MyDAQ和LabVIEW建立了一个胎心音实验系统。结果：该实验系统实现了胎心音的采集、WAV格式存储和读取。时变滤波器和小波除噪的预处理，以及基于TSA的胎心音性质分析，得出胎心音的性质与文献研究一致。结论：该系统廉价、快速原型化、灵活的优势，以及能够开放的特点，不仅能用于胎心音的相关研究，还适用于语音等信号的采集和分析。

The Experiment System of Fetal Heart Sound based-on myDAQ and LabVIEW

Objective： To point out the importance of fetal monitoring and the significant value of detecting fetal heart sound, and design an experiment system to gather and analyze the fetal heart sound. Methods： Firstly, According to the WHO, millions of fetal death around the world each year, but the infant mortality would reduce significantly if pregnant women got fetal monitoring during their pregnancies. An overview points out the value of fetal health surveillance. Then, to compare varieties of fetal monitoring methods, the fetal phonocardiogram is the most important. At last, the paper analyzes the fetal heart sound theory and builds the experiment system based on LabVIEW and myDAQ, to gather and analyze the fetal heart sound based on TSA. Results：The experiment system can gather the fetal heart sound, storage, replay, pre-process with time-varying filter and the wavelet, and analysi~ based on the TSA, the nature of the fetal heart sound consistent with the literature. Conclusions： The system is cheap, rapid prototyping, flexible and open, not only for research fetal heart sound, also apply to the gathering and processing of other signals.