中文摘要：

血栓是制约人工心脏发展的一大难题,有效的检测出血栓对人工心脏的研究具有重要的意义。文章详细研究了超声多普勒血栓检测系统的原理,实现方法,包括超声波探头、发射/接收电路、处理及采集系统的设计并利用短时傅里叶对血栓信号进行分析,并根据实验对血栓检测系统的分辨率进行了验证。

英文摘要：

The thrombus formation is a serious complication in the development of artificial heart,so it is of great importance to detect the thrombus efficiently within the artificial heart.It is feasible to adopt the method of Ultrasonic Doppler for thrombus detection.This paper elaborates the principle,approaches of the thrombus detection system using Ultrasonic Doppler,including designing of the ultrasonic probe,Transmitter/Receive circuit,data processing and col-lecting system,and then through careful analysis of the thrombus signals by short-time Fourier analysis（STFT）,the mimicking thrombus is detected.