弛豫铁电单晶矢量水听器研究

项目名称： 弛豫铁电单晶矢量水听器研究

项目编号： No.11274339

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 李俊宝

作者单位： 中国科学院声学研究所

项目金额： 80万元

中文摘要： 矢量水听器是一种新型的水声测量传感器，它不但能够测量声场的声压信息，而且能够测量声场的矢量信息（质点振速、质点加速度和声压梯度）。近年来国内外对矢量水听器进行了大量研究，但是受到压电陶瓷材料本身性能的限制，在进一步提高矢量水听器的灵敏度、降低自噪声等方面存在较大的难度。弛豫铁电单晶是一种新型的压电材料，具有优异的压电性能，在水听器性能的提高方面具有巨大的潜力。因此本课题利用新型弛豫铁电单晶材料开展矢量水听器的研究工作。通过对弛豫铁电单晶各向异性特性的研究，分析弛豫铁电单晶矢量水听器的建模分析方法。研究弛豫铁电单晶切型及单晶性能取向对矢量水听器灵敏度及自噪声的影响。对不同切型的单晶矢量水听器进行建模分析，研究弛豫铁电单晶材料与矢量水听器结构的匹配问题。最终研制出高灵敏度、低噪声的弛豫铁电单晶矢量水听器样品。

中文关键词： 弛豫铁电单晶；矢量水听器；压电加速度计；换能器；

英文摘要： Vector hydrophone is a new type of underwater acoustic measurement sensor, which can measure acoustic pressure and velocity. it is a difficult to improve the performance of the vector hydrophone for the property of the piezoelectric ceramic. In recent years, the relaxor ferroelectric single crystal is studied as a new type of piezoelectric material, which has excellent piezoelectric properties and promising application perspective. In this project, the relaxor ferroelectric single crystal vector hydrophone is proposed and studied. The analysis method of the hydrophone is studied according to the anisotropic characteristic of the single crystal. The cuts and oritention of the single crystal is analyzed to calculated the influence on the performance of the vector hydrophone. Based on the modle of different cuts of single crystal vector hydrophone, the matching problem between the single crystal and the structure is studied. On this basis, the single crystal vector hydrophone with high sensitivity and low self-noise will be developed.

英文关键词： relaxor ferroelectric single crystals；vector hydrophone；piezoelectric accelerometer；transducer；