一种宽频带压电单晶换能器设计  

Design of a Broadband Piezoelectric Single Crystal Transducer

作　　者：刘一鸣 田丰华[1,2] 宋哲 王涛[1] 吕林夏[1] LIU Yi-ming;TIAN Feng-hua;SONG Zhe;WANG Tao;LV Lin-xia(The 705 Research Institute,China Shipbuilding Industry Corporation,Xi’an 710077,China;School of Information and Communications Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]中国船舶重工集团公司第705研究所,陕西西安710077 [2]西安交通大学电子与信息工程学院,陕西西安710049

出　　处：《水下无人系统学报》2020年第1期107-112,共6页Journal of Unmanned Undersea Systems

摘　　要：为提高复合棒换能器的低频性能、工作带宽、发送电压响应和接收灵敏度,文中以铌镁酸铅-钛酸铅(PMN-PT)压电单晶作为驱动元件,利用匹配层技术拓展带宽,设计了宽频带压电单晶换能器。利用有限元软件分别建立压电单晶换能器和相似规格的压电陶瓷换能器的有限元模型,完成了对PMN-PT单晶材料性能的量化评估。水池测试表明,利用PMN-PT单晶材料作驱动元件的宽带换能器与锆钛酸铅压电陶瓷PZT-4相比,频率更低,带宽更宽,发送电压响应提高3~5dB,接收灵敏度提高1~12dB,可有效提高换能器的水声探测能力。To improve the low-frequency performance,working bandwidth,transmitting voltage response and recei-ving sensitivity of the composite bar transducer,a broadband piezoelectric single crystal transducer is designed with PMN-PT piezoelectric single crystal as the driving element,and the matching layer technology is adopted to expand its bandwidth.The finite element software is employed to establish finite element models of the piezoelectric single crys-tal transducer and a similar piezoelectric ceramic transducer,and quantitative evaluation of single crystal PMN-PT materials is completed.Pool test shows that compared with the transducer with PZT-4 material,the designed broad-band transducer has lower frequency and wider bandwidth,and its transmission voltage response is 3~5 dB higher and receiving sensitivity is 1~12 dB higher,indicating that the designed transducer has better acoustic detection perfor-mance.

关 键 词：复合棒换能器 压电单晶 匹配层 有限元 宽频带 

分 类 号：TJ630[兵器科学与技术—武器系统与运用工程] U666.74[交通运输工程—船舶及航道工程]