便携式家用胎儿心率检测系统的研发与应用

Development and Application of Portable Household Fetal Heart Rate Detection System

从超声多普勒检测终端与智能手机两大模块分析便携式家用胎儿心率检测系统的构成,其中,超声多普勒检测终端进行超声波与反射回波的发射与接收,基于多普勒效应的支持将胎儿心率蕴藏于超声多普勒频移信号中,在终端放大与滤波频移信号之后,经音频线通过模拟信号的方式传递给智能手机,由智能手机对音频接口的麦克风模拟信号进行采集,通过胎儿心率检测算法获得胎儿实时心率值。实验表明,该便携式家用胎儿心率检测系统有较高的准确性与可靠性,功耗低且软件兼容性好,应用价值可以保证.

The paper makes an analysis on portable household fetal heart rate detecting system’s constitution from ultrasonic doppler detection terminal and smartphone 2 modules.Ultrasonic doppler detection terminal is used to transmit and receive ultrasonic and reflection echo,by using doppler principle,it contains fetal heart rate into ultrasonic Doppler shift signal.After enlarging and smoothing frequency shift signal by terminal,it uses analog signal to transmit to smartphone,and gathers audio interface’s microphone analog signal by smartphone,then,uses fetal heart rate detection algorithm to get fetus’real-time heart rate value.Experimental results show that the portable household fetal heart rate detecting system has high accuracy and reliability,it has a low power dissipation and goodsoftware compatibility,the application value can be guaranteed.