磁致伸缩-压电联合激励凹简型发射换能器  

A hybrid magnetostrictive-piezoelectric barrel-stave projector

作　　者：柴勇[1] 莫喜平[1] 刘永平[1] 崔政[1] 

机构地区：[1]中国科学院声学研究所

出　　处：《声学学报》2006年第6期523-526,共4页Acta Acustica

摘　　要：设计制作了一种新型磁致伸缩-压电联合激励凹简型发射换能器,采用稀土超磁致伸缩材料Terfenol-D与PZT压电陶瓷作为联合激励元件,模拟计算与实测结果均表明,与采用单一振子激励的凹筒型发射换能器相比,此种新型换能器在保持尺寸小、频率低等优点的同时,显著拓宽了工作频带并提高了辐射声功率。换能器外型尺寸为φ88 mm×316 mm,水中谐振频率1．30 kHz,-3 dB带通Q值1．43,谐振频率下发射电压响应级135．1 dB。A hybrid magnetostrictive-piezoelectric barrel-stave projector is designed and developed, the new type transducer is consists of rare-earth giant magnetostrictive material Terfenol-D and PZT piezoelectric ceramic as union driving elements. Combining the advantage of low frequency performance with a compact size, it proves that the hybrid projector has a much broader band and higher sound power than thta of single magnetostrictive or piezoelectric driver by the simulated and measured results. The prototype of the hybrid projector has a size of 88 mm in outside diameter and 316 mm in length, with an underwater resonant frequency of 1.30 kHz, Q factor of 1.43 for -3 dB bandwidth, and transmitting voltage response level of 135.1 dB at the resonant frequency.

关 键 词：稀土超磁致伸缩材料 PZT压电陶瓷 发射换能器 联合激励 谐振频率 外型尺寸 辐射声功率 设计制作 

分 类 号：O423[理学—声学]