摘要
文中介绍基于DSP的超声多普勒胎儿监护仪的工作原理及实现方法。系统中超声探头的输出信号能够准确地反映出心跳过程,信号杂波较少。宫缩压力探头能够灵敏地反映出胎动时母体子宫收缩程度的变化。由TMS320LF2407A构成的DSP模块完成对胎心信号、宫缩压力信号和胎动标记请求信号的实时处理,同时实现心跳的音量控制。临床试验表明,此系统实现了胎儿心跳信号的无创拾取、胎心率及宫缩压的计算和实时输出,符合国家标准。
This paper introduces the principle and implementation of fetal monitor based on DSP and ultrasonic Doppler theory. In this system, the ultrasonic probe could accurately trace the heart beating process and the output signal quality was good. The uterine contraction detector could sensitively reflect the uterine pressure change. The signals of fetal heart beating, uterine contraction and mark were processed with the DSP TMS320LF2407A. Meanwhile, the volume control of the heart beat sound was realized by the DSP module. The clinic experiment showed that the system could acquire the fetal heart beating signal without any hurt, and the procession and output of the FHR and UC was real-time. The monitor lives up to the National Standard.
出处
《国外电子测量技术》
2006年第4期76-79,共4页
Foreign Electronic Measurement Technology
