摘要
阐述了频谱多普勒检测技术的基本原理和方法,介绍了软件无线电的概念和特点,并详细讨论了基于软件无线电的多普勒血流仪的设计与实现方法;文章把超声频谱多普勒成像系统分为正交解调部件、距离选通与累加部件、谱分析与音频处理部件3个部分,分别予以设计实现,详细阐明了每一个部件的设计方法,最后给出了结论。
First, the basic principle and method of ultrasonic Doppler measurement technique are generally explained. Second, the concepts, characteristics of software radio are briefly introduced. Third, the design and implementation methods of ultrasonic spectrum Doppler imaging system based on software radio are discussed in detail. The ultrasonic spectrum Doppler imaging system is divided into three parts, such as quadrature demodulation circuit, chosen distance accumulation circuit and spectrum analysis and acoustic audio processing circuit. These three parts are designed and realized separately. The design methods of every part are expounded in detail. At last, the conclusion is presented.
出处
《计算机测量与控制》
CSCD
2005年第9期1017-1020,共4页
Computer Measurement &Control
基金
国家自然科学基金重点项目(60135020)
