摘要
在移动智能终端上实现单通道胎儿心电监护系统,利用基于两次奇异值分解(SVD)的单通道胎儿心电提取算法,解决胎心提取中的波形缺失问题,实时获取高信噪比的胎儿心电信号。利用STM32单片机控制24位采样芯片ADS1298,对单通道的孕妇腹部信号进行采集,并将采集后的数据经蓝牙传送给移动智能终端,在移动智能终端上完成对胎儿心电的实时提取、显示、存储与分析,计算出相应的心律变异率,并实现对胎儿心电监护系统的控制。测试结果表明,提取出的胎儿心电信号信噪比改善为29.43 dB,准确度为98.01%,阳性预测率为97.81%,系统具有良好的稳定性和兼容性,连续处理5个母体心动周期的数据所花的时间约为3.671 ms,远小于一个母体心动周期(约0.8 s)的时间,适用于母体或胎儿心律不齐的情况。该胎儿心电监护系统具有连线简单、便于操作、准确性高、可移植性强等特点,适合基层医院和家庭使用。
A single-channel fetal electrocardiogram(ECG)monitoring system based on Android mobile smart terminal is designed to realize single-channel fetal ECG extraction algorithm using twice Singular Value Decomposition(SVD),solve the problem of missing waveforms in fetal ECG extraction and obtain real-time fetal ECG signals with high signal-to-noise ratio.Using STM32 single-chip microcomputer to control the 24-bit sampling chip ADS1298,the single-channel pregnant woman′s abdomen signal is collected.Then the collected data is transmitted to the mobile intelligent terminal via Bluetooth.On the Android-based mobile smart terminal,the functions of real-time extraction,display,storage and analysis of fetal ECG,calculation of heart rhythm variability,and control of the entire monitoring system are completed.The test results show that the system can accurately extract fetal ECG signals from single-channel pregnant women′s abdominal signals,with an improved signal-to-noise ratio of 29.43 dB,an accuracy of 98.01%,and a positive prediction rate of 97.81%.The system has good stability and compatibility,and takes about 3.671 ms to continuously process 5 maternal cardiac cycles,which is much less than the time of a maternal heartbeat cycle(about 0.8 s),and is suitable for maternal or fetal arrhythmia.The fetal ECG monitoring system has the characteristics of simple connection,easy operation,high accuracy,strong portability,etc.,and is suitable for primary hospitals and families.
作者
杨珣
李媛媛
祝茂峻
薛诚浩
赵兴望
卜朝晖
Yang Xun;Li Yuanyuan;Zhu Maojun;Xue Chenghao;Zhao Xingwang;Bu Zhaohui(Institute of Biomedical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《电子测量技术》
北大核心
2021年第14期17-25,共9页
Electronic Measurement Technology
关键词
单通道
胎儿心电提取
奇异值分解
移动智能终端
ANDROID
single-channel
fetal ECG extraction
singular value decomposition
mobile intelligent terminal
Android
