传感技术学报2025，Vol.38Issue(1)：38-44,7.DOI:10.3969/j.issn.1004-1699.2025.01.004
宽带高频阶梯式复合材料敏感元件的设计
Design of Broadband High Frequency Stepped Composites Sensitive Elements
摘要
Abstract
A stepped piezoelectric composite sensitive element is proposed for the problem of the operating bandwidth of the hydroacous-tic transducer.The stepped piezoelectric composite takes the methods of reducing the mechanical quality factor and utilizing multi-mode coupling technology to effectively expand the operating bandwidth.An equivalent circuit method is adopted to theoretically analyze a sin-gle 1-3-2 type piezoelectric composite in a stepped piezoelectric composite to derive the relationship between its base thickness dimen-sion and theoretical resonant frequency.Then the finite element analysis software is used to simulate the individual 1-3-2 piezoelectric composites and stepped piezoelectric composites to obtain the relationship between the base thickness of individual 1-3-2 piezoelectric composites and the cross-sectional area of ceramic small columns and the resonant frequency,and the simulation is compared with the theory to reasonably design the geometry of stepped piezoelectric composites and make the sample of the sensitive element of stepped pi-ezoelectric composites.The sensitive element is prepared as a sensor and tested underwater.The test results are consistent with the theo-retical and simulation results,the operating frequency range is 143 kHz～239 kHz,and the bandwidth is 96 kHz,which is good for multi-mode coupling and dramatically expands the working bandwidth.关键词
压电复合材料/宽带/有限元分析/多模耦合Key words
piezoelectric composites/broadband/finite element analysis/multimode coupling分类
通用工业技术引用本文复制引用
魏彤,王宏伟,于肇贤,井苏杰..宽带高频阶梯式复合材料敏感元件的设计[J].传感技术学报,2025,38(1):38-44,7.基金项目
国家自然科学基金项目(61771060) （61771060）
北京市教委科研计划科技重点项目(KZ202111232050) （KZ202111232050）
