基于反转层结构与镁合金匹配层的低强度超声换能器设计研究

Design Study of Low-Intensity Ultrasonic Transducer Based on Inverted Layer Structure and Matching Layer of Magnesium Alloy

摘要: 目前市场上常见的医用压电型超声换能器大多采用传统的单压电层结构，这种结构的换能器其中心频率与压电层的厚度成反比，因此随着中心频率的增加，该类换能器的厚度越来越薄，导致其制造变得愈加困难。针对这一问题，本研究拟采用双压电反转层技术，设计一种基于反转层结构与镁合金匹配层的新型低强度超声换能器模型。本研究为低强度超声换能器的优化设计提供了一种有效思路，对提升低强度超声换能器的性能有一定的指导意义。

Abstract: At present, most of the commonly used medical piezoelectric ultrasound transducers in the market adopt the traditional single piezoelectric layer structure. The center frequency of this kind of transducer is inversely proportional to the thickness of the piezoelectric layer. Therefore, as the center frequency increases, the thickness of the piezoelectric layer of this kind of transducer becomes thinner, making its manufacturing increasingly difficult. To address this issue, this study intends to use the dual piezoelectric inversion layer technology to design a new low-intensity ultrasonic transducer model based on the inversion layer structure and magnesium alloy matching layer. This study provides an effective approach for optimizing the design of low-intensity ultrasound transducers, which has certain guiding significance for improving the performance of low-intensity ultrasound transducers.