胎心信号提取及检测仪设计  

Instrument design of fetal signal extraction and monitoring

作　　者：马瑞亭[1] 王辉林[1] 陈志敏[1] 蔡开云[1] 

机构地区：[1]山东理工大学机械工程学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2010年第3期52-55,共4页Journal of Shandong University of Technology:Natural Science Edition

摘　　要：利用超声多普勒效应检测胎心信号是胎心检测仪常用的方法.建立了超声多普勒效应检测胎心信号的物理模型,并由此模型得到了胎心信号的调频调幅信号.给出了同步检波电路及胎心信号的计算公式,并在此基础上设计了胎心检测仪.该检测仪具有高敏感性和低超声功率输出的特点.Using Doppler effect to detect fetal heart rate is a commonly used method in fetal heart rate detectors. This paper presented physical model of using Doppler effect to detect fetal heart rate signal, pointed out that the received ultrasound fetal heart signal is FM-AM signal, the frequency and amplitude changes can reflect the fetal heart rate signals. The synchronous detection circuit was shown and the formula for calculating fetal heart signal was given. The fetal heart monitor according to the above principle and framework has such characteristics as high sensitivity and low ultrasonic power output.

关 键 词：超声波 多普勒效应 调频调幅 同步检波 

分 类 号：TB556[理学—物理]