摘要
本文是研制超声相控阵换能器动态聚焦系统，它包括数字式多通道信号发射系统和两种超声 相控阵换能器。用数字式多通道信号发射系统产生多路数字信号，通过改变每路信号的时延（相位）， 控制相控阵换能器的各个阵元，使它们发出的声束在空间某点聚焦。我们对这两种相控阵进行了实 验测量，结果表明，用数字控制的相控阵换能器，可以实现精密的动态聚焦，并可取得良好的聚焦效 果。
This paper focuses on developing a digital ultrasonic phased array transducer system which can realize the focusing and scanning of sound beams. The system consists of a digital multi-channel transmitting circuit and two kinds of ultrasonic phased array transducers. Sound beams, produced by the array elements, can be focused onto a point by using this digital transmitting circuit to control the signal phase of each channel. Experimental results indicate that the phased array transducers can realize dynamic focusing with high precision.
出处
《应用声学》
CSCD
北大核心
2000年第6期14-18,共5页
Journal of Applied Acoustics
基金
国家自然科学重点基金项目资助!(批准号19634050)
关键词
超声聚焦
动态聚焦
超声换能器
相探阵
超声诊断
Ultrasonic focusing, Dynamic focusing, Ultrasound transducer, Phased array
