宽带多模带障板压电圆柱壳换能器。

Broadband multimode baffled piezoelectric cylindrical shell transducers.

作者信息

Oishi Tetsuro, Aronov Boris, Brown David A

机构信息

Acoustic Research Laboratory, Advanced Technology and Manufacturing Center, and Department of Electrical and Computer Engineering, University of Massachusetts Dartmouth, 151 Martine Street, Fall River, Massachusetts 02723-1502, USA.

出版信息

J Acoust Soc Am. 2007 Jun;121(6):3465-71. doi: 10.1121/1.2722053.

DOI:10.1121/1.2722053

PMID:17552698

Abstract

Hollow piezoelectric cylindrical shell transducers may be made directional for underwater acoustic applications by the use of suitable acoustical baffles and the operational bandwidth may be extended by using multiple resonant modes. A theoretical and experimental investigation was performed for circumferentially baffled piezoelectric cylindrical shell transducers operating in the zero and one modes of extensional vibration. The frequency responses and directivity patterns were analyzed under various conditions of energizing separate halves of electrodes. It was found that the broadest frequency response with nearly constant beamwidth can be obtained when the two halves of the piezoelectric ring are electromechanically excited 90 deg out-of-phase. The experimental results obtained with a proof-of-concept transducer were in good agreement with the theoretical predictions.

摘要

空心压电圆柱壳换能器可通过使用合适的声学障板实现水下声学应用的定向性，并且可通过使用多个共振模式来扩展工作带宽。对在零阶和一阶伸展振动模式下工作的周向障板压电圆柱壳换能器进行了理论和实验研究。在分别激励电极两半部分的各种条件下分析了频率响应和指向性图案。结果发现，当压电环的两半部分进行机电异相90度激励时，可获得具有近乎恒定波束宽度的最宽频率响应。用概念验证换能器获得的实验结果与理论预测吻合良好。