压电单晶换能器及其温度实验研究  

Research on Piezoelectric Single Crystal Transducer and Its Temperature Experimental

作　　者：涂其捷 滕超[1] 丁俊文 周瑜[1] TU Qijie;TENG Chao;DING Junwen;ZHOU Yu(The 3th Research Institute of China Electronics Technology Group Corporation,Beijing 100015,China)

机构地区：[1]中国电子科技集团公司第三研究所,北京100015

出　　处：《电声技术》2020年第5期80-82,共3页Audio Engineering

摘　　要：压电单晶作为新型的功能材料,具有声速低、应变大以及能量密度高等特点,在超声探伤、超声焊接以及水声探测等领域具有良好的应用前景。基于有限元数值计算的方法,设计了一种基于弛豫铁电单晶的复合棒换能器,进行模态和谐响应分析,并制作了换能器样机,样机测试结果与仿真计算相吻合。此外,在此基础上对样机进行温度实验,得到了该换能器谐振频率、反谐振频率、阻抗值以及机电耦合系数等随温度变化的规律,对换能器的实际应用具有指导意义。As a new type of functional material, piezoelectric single crystal has the characteristics of low sound velocity, high strain and high energy density, and has a good application prospect in ultrasonic flaw detection, ultrasonic welding and underwater acoustic detection. In this paper, a new type of tonpilz transducer based on relaxation ferroelectric single crystal is designed based on finite element numerical calculation method. On this basis, the temperature experiment of the prototype is carried out, and the variation rules of the resonant frequency, anti-resonant frequency, impedance and electromechanical coupling coefficient of the transducer with the temperature are obtained, which is of great significance to the practical application of the transducer.

关 键 词：压电单晶 换能器 机电耦合系数 复合棒 

分 类 号：TB565.1[交通运输工程—水声工程]