Li Denghua, Wu Min, Oyang Peixi, Xu Xiaofei
Beijing Information Technology Institute, Beijing 100101, PR China.
Ultrasonics. 2006 Dec 22;44 Suppl 1:e685-7. doi: 10.1016/j.ultras.2006.05.127. Epub 2006 Jun 6.
The working principle of Cymbal piezoelectric composite underwater acoustic transducer was studied in this paper. PZT-5A piezoelectric ceramic disk was used as piezoelectric phase and brass foil was used as end cap electrode of the Cymbal transducer. The silicon rubber was used as the insulated proof layer of the underwater acoustic transducer. The properties of this transducer used as hydrophone, such as operation frequency, free-field voltage receiving sensitivity and directivity, were investigated. Several kinds of prototype of this transducer were fabricated and the properties of this transducer used as hydrophone were tested. The results show that the properties of this transducer used as hydrophone depend on the dimensions of Cymbal transducer because the piezoelectric properties of this transducer are dependent on the dimensions of Cymbal transducer's end caps. The appropriate dimensions for getting higher free-field voltage receiving sensitivity with -184.7 dB were obtained.
本文研究了钹型压电复合水下声换能器的工作原理。采用PZT - 5A压电陶瓷圆盘作为压电相，黄铜箔作为钹型换能器的端盖电极。硅橡胶用作水下声换能器的绝缘防护层。研究了该换能器作为水听器时的工作频率、自由场电压接收灵敏度和指向性等特性。制作了几种该换能器的原型，并测试了其作为水听器的性能。结果表明，该换能器作为水听器的性能取决于钹型换能器的尺寸，因为该换能器的压电性能取决于钹型换能器端盖的尺寸。获得了能得到 - 184.7 dB更高自由场电压接收灵敏度的合适尺寸。
