Title :
A wide-band stagger-tuned transducer used for pulsed ultrasonic Doppler flowmeter
Author :
Zhang, Yili ; Chen, Qimin ; Zang, Xiaofei ; Hou, Zhezang
Author_Institution :
Appl. Acoust. Inst., Shaanxi Teachers Univ., China
Abstract :
A stagger-tuned wide-band transducer based on the principle of the stagger-tuned amplifier has been developed. A number of strip-shaped PZT-5A elements with different resonant frequencies were arranged according to tuning theory. The results of the experiments indicate that the frequency response of the transducer is very good over a fairly large range. The bandwidth of a stagger-tuned transducer designed for a frequency range of 2-3 MHz is about 1.36 MHz, whereas the bandwidth of a single-element transducer is only 0.05 MHz. Moreover, as compared with the single-element transducer, it gives far more abundant blood-flow information
Keywords :
biomedical equipment; biomedical ultrasonics; flowmeters; haemodynamics; ultrasonic transducers; 1.36 MHz; 2 to 3 MHz; PZT; PbZrO3TiO3; bandwidth; blood-flow information; frequency response; pulsed ultrasonic Doppler flowmeter; resonant frequencies; strip-shaped PZT-5A elements; tuning theory; wide-band stagger-tuned transducer; Acoustic transducers; Bandwidth; Blood flow; Frequency response; Impedance; Pulse amplifiers; Tuning; Ultra wideband technology; Ultrasonic transducers; Voltage;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96110
