基于复合材料叠堆圆管的多谐圆柱阵换能器研制

项目名称： 基于复合材料叠堆圆管的多谐圆柱阵换能器研制

项目编号： No.61471047

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 王丽坤

作者单位： 北京信息科技大学

项目金额： 89万元

中文摘要： 换能器是一种声波收发器件，广泛用于水下探测、通讯、导航、测绘等。它的频带宽度及波束指向性直接影响其性能，探求更宽的频带以及更广的波束开角一直是换能器研究的主要问题。目前的宽带换能器主要有复合材料和多模耦合两类，现有的复合材料换能器由于工艺的限制只能成型平面状结构，使其波束开角受到限制，而多模耦合的换能器大多采用陶瓷敏感元件，虽然通过其球形或柱形的结构可实现较大的波束开角，但其带宽不及复合材料。本项目针对现行宽带换能器存在的缺陷，提出采用切割陶瓷-填充橡胶-成形曲面-溶蚀橡胶-浇注环氧的新技术，实现压电复合材料的曲面成型，制备复合材料圆管或圆弧；项目同时还提出采用不同厚度的复合材料圆管叠堆构成敏感元件，研制新型的圆柱阵换能器，以拓展换能器带宽并实现水平全向的波束开角。该结构换能器目前未见有报道，它可兼有宽带及大波束开角的特点，弥补现有换能器的不足。

中文关键词： 压电传感器；压电复合材料；压电陶瓷

英文摘要： Transducer is a kind of device for transmitting and receiving sound wave, it is applied abroad in underwater detecting, communication, navigation, mapping and so on. It's bandwidth and beamwidth are important parameters affecting it's applications. Seeking broader bandwidth and beamwidth are research hotspots all the time. There are two kinds of transducers with broad bandwidth now. One is composite transducer which has narrow beamwidth for it's composite sening element can only be shaped into a plane. The other one is multimode coupling transducer, it made from piezoelectric ceramic often taked a plane, sphere and cylinder shape. Althoug it has broader beamwidth when taked sphere and cylinder, but it's bandwidth is narrower than composite transducer. A noval technology, namely diceing ceramic-filling rubber- curving-dissolving rubber-pouring epoxy, has been developed in this project, which can be used to fabricate the composite with curved shape, such as arc plate and circular tube. A new type cylinder transducer with sening element of composite tubes stack is also developed in this project, it's bandwidth and beamwidth can be expanded by coupling vibration of composite tubes. The shortcoming of narrow beamwidth in current composite transducers can be overcomed by this kind of transducer. Now there is no research report about cylinder transducer with composite tubes stack.

英文关键词： piezoelectric transducer;composite;piezoelectric ceramic