磁致伸缩超声换能器阻抗匹配网络的设计

Design of impedance matching network for magnetostrictive ultrasonic transducer

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。

According to the equivalent circuit model and impedance matching theory of magnetostrictive ultrasonic transducers,an optimized-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-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.