双金属板高灵敏压电换能器的研究  

Study of bimetal plate high sensitive piezoelectric transducer

作　　者：朱永基 王宏伟[1] 于肇贤[1] ZHU Yongji;WANG Hongwei;YU Zhaoxian(School of Applied Sciences,Beijing Information Science&Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学理学院,北京100192

出　　处：《传感器与微系统》2025年第1期64-67,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(61771060);北京市自然科学基金资助项目(KZ202111232050)。

摘　　要：为有效提高水声换能器的接收灵敏度,在1-3型压电复合材料的基础上,提出了一种双金属板压电陶瓷柱阵列结构材料,即压电陶瓷柱阵列间不添加聚合物,并在上下端面粘接金属板,从而减少了压电柱间的横向耦合,减小损耗,提高了厚度振动机电耦合系数,同时利用声压应力放大作用提高了接收灵敏度。仿真结果表明,该结构的机电耦合系数达到0.67,相比纯压电材料与1-3型压电复合材料,分别提高约52%与9.8%。利用陶瓷切割、打磨基底以及高压粘合金属板等工艺,制备了双金属板结构压电换能器。经水下测量系统测试,发送电压响应达到154.8 dB,接收灵敏度达到-181 dB,与1-3型压电复合材料换能器相比,接收灵敏度有8.5 dB的提高。In order to effectively improve the receiving sensitivity of hydroacoustic transducer,a double metal plate piezoelectric ceramic columnarray structure material is proposed,on the basis of 1-3 type piezoelectric composite material,i.e.,no polymer is added between the piezoelectric ceramic column array,and the metal plate is bonded at the upper and lower end,which reduces the lateral coupling between the piezoelectric columns,reduces the loss,improves the thickness vibration electromechanical coupling coefficient,and improves the receiving sensitivity by using the acoustic pressure stress amplification.Simulation results show that the electromechanical coupling coefficient of this structure reaches 0.67,which is about 52%and 9.8%higher than that of pure piezoelectric material and 1-3 type piezoelectric composite material,respectively.The piezoelectric transducer of the bimetal structure is prepared by cutting the ceramic,grinding the substrate and bonding the metal plate under high pressure.The transmitting voltage response is 154.8 dB and the receiving sensitivity is-181 dB,which is 8.5 dB higher than that of the 1-3 piezoelectric composite transducer,as measured by the underwater measurement system.

关 键 词：压电陶瓷 水声换能器 有限元分析 接收灵敏度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TB552[自动化与计算机技术—控制科学与工程]