Page 81 - 《应用声学》2021年第2期

第 40 卷 第 2 期 Vol. 40, No. 2
2021 年 3 月 Journal of Applied Acoustics March, 2021

⋄ 研究报告 ⋄

磁致伸缩超声换能器阻抗匹配网络的设计 ∗

冉 超 1,2 黄文美 1,2† 翁 玲 1,2

(1 河北工业大学 省部共建电工装备可靠性与智能化国家重点实验室 天津 300130)
(2 河北工业大学 河北省电磁场与电器可靠性重点实验室 天津 300130)
摘要：根据磁致伸缩超声换能器的等效电路模型和阻抗匹配理论，该文设计了一种优化的 π 型匹配网络。该
网络具有调谐、变阻和滤波的功能，适用于工作在中低频超声频率范围内的磁致伸缩超声换能器系统的阻抗
匹配。仿真和实验结果表明：接入该 π 型阻抗匹配网络后，驱动电源与换能器之间实现了最大功率传输，换能
器两端电信号的波形质量得到优化，换能器激励电流提升了 40%。该研究可为大功率磁致伸缩超声换能器的
应用提供技术支持。
关键词：电磁超声；磁致伸缩换能器；阻抗匹配；阻抗频率特性
中图法分类号: TB552 文献标识码: A 文章编号: 1000-310X(2021)02-0249-06
DOI: 10.11684/j.issn.1000-310X.2021.02.011

Design of impedance matching network for magnetostrictive

ultrasonic transducer

RAN Chao 1,2 HUANG Wenmei 1,2 WENG Ling 1,2

(1 State Key Laboratory of Reliability and Intelligence of Electrical Equipment (Province and Ministry Jointly Set Up),
Hebei University of Technology, Tianjin 300130, China)
(2 Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province,
Hebei University of Technology, Tianjin 300130, China)

Abstract: According to the equivalent circuit model and impedance matching theory of magnetostrictive
ultrasonic transducers, an optimized π-type matching network is designed in this paper. The network has the
functions of tuning, variable resistance and filtering, and is suitable for impedance matching of magnetostrictive
ultrasonic transducer systems operating in the mid-and low-frequency ultrasonic frequency ranges. Simulation
and experimental results show that: after accessing the π-type impedance matching network, the maximum
power transmission between the driving power supply and the transducer is realized, the waveform quality of
the electrical signal at both ends of the transducer is optimized, and the excitation current of the transducer is
increased by 40%. The paper provides a technical support for the application of high-power magnetostrictive
ultrasonic transducers.
Keywords: Electromagnetic ultrasound; Magnetostrictive transducer; Impedance matching; Impedance
frequency characteristics

2020-04-17 收稿; 2020-06-28 定稿
国家自然科学基金项目 (51777053)
∗
作者简介: 冉超 (1995– ), 男, 重庆人, 硕士研究生, 研究方向: 磁致伸缩超声换能器。
通信作者 E-mail: huzwm@hebut.edu.cn
†