超声换能器频率特性及匹配研究  

Study on frequency characteristics and matching of ultrasonic transducer

作　　者：杜鹏[1] 姜楠[1] 宋波[1] 

机构地区：[1]电子科技大学电子科学技术研究院,四川成都611731

出　　处：《电声技术》2016年第1期41-45,共5页Audio Engineering

摘　　要：超声换能器是一种强非线性时变系统,在不同的工作频率下其阻抗等特性差别很大。在超声换能器的应用中需要对超声换能器进行频率特性分析及阻抗匹配,以达到最高的传输效率和最佳的波形效果。详细分析了超声换能器的频率特性及匹配方式,并对超声换换能器参数进行了测试,根据测试参数设计了阻抗匹配电路。理论分析和实验测试表明,良好的频率及阻抗匹配电路有利于优化超声波发射波形,提高电声转化效率。A ultrasonic transducer is a strong nonlinear, time-varying system.When working in different frequency, ultrasonic transducer＇s impedance and other characteristics vary. In order to obtain maximum transmission efficiency and best wave quality, the analysis and matching of ultrasonic transducer are essential.It is analyzed that the ultrasonic transducer＇ s frequency characteristic and matching method in detail, and ultrasonic transducer＇ s parameters are tested.An impedance matching circuit is designed according the test results.The theoretical analysis and experimental tests show that good frequency and impedance matching circuit is conducive to optimizing the transmitted waveform, improving efficiency.

关 键 词：超声换能器 频率特性 谐振 匹配电路 

分 类 号：TN929[电子电信—通信与信息系统]