测试技术学报2025，Vol.39Issue(5)：511-517,7.DOI:10.62756/csjs.1671-7449.2025081
声阻抗可调节超声匹配层研究
Study of Acoustic Impedance Tunable Ultrasonic Matching Based on Piezoelectric Shunt
摘要
Abstract
Ultrasonic impedance matching has a wide range of applications in the fields of nondestructive testing and ultrasonic imaging.In this paper,a piezoelectric shunt-based acoustic impedance tunable ultrasonic matching layer is proposed,which consists of a piezoelectric disc with a shunt circuit,and the effective acoustic impedance of the matching layer can be controlled in real time by adjusting the parameters of the shunt circuit.The theoretical results show that the acoustic impedance adjustable ultrasonic matching layer is capable of adjusting the impedance in the range of 1.5～20 MRayl compared with the conventional non-adjustable ultrasonic matching layer.Numerical calculations and simulation analyses also verified the impedance matching effect of the structure,and the transmittance was greater than 90%.Test samples of the acoustic impedance matching structure were fabricated,and the acoustic impedance matching effect of the structure was experimentally verified.关键词
超声阻抗匹配/压电分流/有效声阻抗Key words
ultrasonic impedance matching/piezoelectric shunt/effective acoustic impedance分类
机械制造引用本文复制引用
丁春雄,蒋晓菡,俞燕萍,侯永琪,张辉,郑凯..声阻抗可调节超声匹配层研究[J].测试技术学报,2025,39(5):511-517,7.基金项目
国家重点研发计划资助项目(2023YFC3010300) （2023YFC3010300）
国家自然科学基金资助项目(52272433) （52272433）
江苏省市场监督管理局技术项目(KJ2024024) （KJ2024024）
