基于2-2型压电陶瓷复合材料的三匹配层宽带医用超声相控阵换能器研制

Development of Three Matching Layer Broadband Medical Ultrasonic Phased Array Transducer with 2-2 Piezoelectric Ceramic Composite

选用2-2型压电陶瓷复合材料,利用三匹配层设计方案和KLM模型优化方法研制三匹配层结构的宽带医用相控阵换能器;根据设计参数,实际制作医用相控阵换能器。结果表明:实际制作的医用相控阵换能器的中心频率为2.95MHz,-6dB相对带宽约为83.2%,与理论设计结果(3.05MHz,87.8%)基本一致,符合设计要求。该换能器有望用于对心脏疾病的显像诊断。

A three matching layer structure broadband medical phased array transducer was developed with 2-2 piezoelectric ceramic composite by three matching layer design scheme and KLM model optimization method.According to the design parameters,the medical phased array transducer was actually manufactured.The results show that the center frequency of actually produced medical phased array transducer was 2.95 MHz,and the relative bandwidth at-6 dB was about 83.2%,which were basically consistent with the theoretical design results(3.05 MHz,87.8%)and met the design requirements.The transducer is expected to be used for imaging diagnosis of heart diseases.