用于产生水下导航声螺旋波的圆柱形换能器（L）。

Cylindrical transducer for producing an acoustic spiral wave for underwater navigation (L).

机构信息

BTech Acoustics LLC, Advanced Technology and Manufacturing Center, University of Massachusetts Dartmouth, 151 Martine Street, Fall River, Massachusetts 02723, USA.

出版信息

J Acoust Soc Am. 2012 Dec;132(6):3611-3. doi: 10.1121/1.4763994.

DOI:10.1121/1.4763994

PMID:23231092

Abstract

A cylindrical piezoceramic transducer using two orthogonal dipoles driven in phase quadrature to create an acoustic spiral wave, having constant amplitude and phase that varies linearly with azimuthal angle, is considered as a source for an underwater acoustic navigation system. Comparison of the spiral-wave signal with an omnidirectional reference signal having a constant phase originating from the same or co-located source provides a means for an underwater vehicle to determine its bearing angle relative to the signaling beacon [B. Hefner and B. Dzikowicz, J. Acoust. Soc. Am. 129(6), 3630-3639 (2011)]. An alternative proof-of-principle transducer along with experimental results including transmit frequency response, directional factors, and computed versus measured bearing angle are presented.

摘要

采用两个正交偶极子以相位正交方式驱动的圆柱形压电换能器可产生具有恒定幅度和相位的声螺旋波，相位随方位角线性变化，被视为水下声导航系统的一种声源。将螺旋波信号与来自同一或共置声源的具有恒定相位的全向参考信号进行比较，为水下航行器提供了一种确定其相对于信标方位角的方法[B. Hefner 和 B. Dzikowicz，J. Acoust. Soc. Am. 129(6)，3630-3639(2011)]。本文提出了一种替代原理验证换能器以及包括发射频率响应、指向性因数和计算与测量方位角在内的实验结果。