ULTRASOUND PULSE DOPPLER SYSTEM FOR STUDYING BLOOD CIRCULATION

摘要

The ultrasound pulse Doppler system for studying the blood circulation comprises the following units connected in series: the clock signal generator, the transmitter, and the ultrasound transducer. The input of the transducer represents the output for the response signal. Furthermore, the system comprises the following units also connected in series: the unit for controlling the frequency of the heterodyne, the receiver and the processing and indication unit. The system also contains the autocorrelation unit for assessing the average frequency and the synchronizer.