本文介绍二种类型,三种不同材料的用于线阵实时扫描系统中的80阵元超声聚焦换能器的设计原理和实验结果。我们研制的线阵换能器的主要特点是:阵元组数多,因而获得扫描线多,图象清晰;阵元间互祸影响小,一般在8%以下,有的可达4%以下;在短轴方向采用有源聚焦或透镜聚焦,可获得波束角为2.5°的窄声束;采用双层匹配和较佳的吸收层,以得到的频带宽度为0.8mHz。实验结果表明与理论设计基本一致.经配机试验,己获得较为清晰的图像. This article describes two types of three different materials used in linear array real-time scanning system 80-element ultrasonic focusing transducer design principles and experimental results. The main features of the linear array transducer we developed are as follows: the number of array elements is much and thus the number of the scanning lines is much and the image is clear; the effect of mutual distress between elements is small, generally below 8%, and some up to 4% ; The use of active focusing or lens focusing in the minor axis direction results in a narrow beam with a beam angle of 2.5 ° and a double matching and better absorption layer results in a bandwidth of 0.8 mHz. Experimental results show that the theoretical design is basically consistent with the machine test, have been more clear images.