文章摘要

文章信息/Info

作者:: 戴明1; 2; 3; 詹凯1; 2; 3; 陈昕1; 2; 3; 林浩明1; 2; 3; 孟德明1; 2; 3; 陈思平1; 2; 3△; 1. 深圳大学生物医学工程学院，广东深圳 518060；2. 医学超声关键技术国家地方联合工程实验室，深圳 518060；3.广东省医学信息检测与超声成像重点实验室，深圳518060

Author(s):: DAI Ming1; 2; 3; ZHAN Kai1; 2; 3; CHEN Xin1; 2; 3; LIN Haoming1; 2; 3; MENG Deming1; 2; 3; CHEN Siping1; 2; 3; 1.School of Biomedical Engineering, Shenzhen University, Shenzhen 518060，Guangdong，China;2.National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen 518060；3.Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Shenzhen 518060

Keywords:: Fetal heart monitoring; Noise removal; Doppler shift; Weak signal detection; High-sensitivity

摘要:: 本研究设计并实现了一款便携式，全数字，用于围产期胎儿心率检测的多普勒胎心系统，其采用对超声回波加窗，数字相乘等方法获取频移信号，并可对特定组织深度进行运动检测。该系统由CPLD超声激励及采集电路、MCU及外围电路和系统软件三部分组成。与两款商用胎心仪相比，本系统准确度较高，能够稳定可靠的对胎心进行检测。

Abstract:: A novel, fully-digital and portable FHR measuring system that could be applied for FHR detection was designed. Digital multiplication methods and windowed ultrasonic echo were adopted to obtain the doppler frequency shift signal that could be detected at specific depths of tissue. This proposed system included three portions, namely: (1) CPLD ultrasonic excitation and acquisition circuit, (2) MCU and peripheral circuit, and (3) the system software. And the experimental results prove that the proposed system can be a stable and reliable alternative for the measurement of FHR, in comparison with two commercial fetal heart measuring instruments.