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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Characterization and assessment of an integrated matching layer for air-coupled ultrasonic applications
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Characterization and assessment of an integrated matching layer for air-coupled ultrasonic applications

机译：空气耦合超声应用的集成匹配层的表征和评估

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摘要

A novel ultrasonic matching layer for improving coupling between piezoelectric transducers and an air load is presented and the results of a theoretical and experimental program of work are provided. A combination of a porous material that has very low acoustic impedance with a low-density rubber material forms the basis of the approach. These matching layers were first analyzed experimentally using scanning electron and optical microscopy to determine the microscopic structure. Air-coupled resonance measurements were then performed to reveal the acoustic parameters of the individual layers that were identified within this multilayered structure. These data were then incorporated into a conventional linear model, and this has been verified and used to study performance and produce designs. Close correlation between experiment and theory is demonstrated. The most efficient designs have been implemented in a pitch/catch air-coupled system, and an improvement in received signal amplitude of 30 dB was achieved when compared with the unmatched case.
机译：提出了一种新型的超声匹配层，用于改善压电换能器与空气负载之间的耦合，并提供了理论和实验工作结果。具有非常低的声阻抗的多孔材料与低密度橡胶材料的组合构成了该方法的基础。首先使用扫描电子和光学显微镜对这些匹配层进行实验分析，以确定微观结构。然后进行空气耦合共振测量，以揭示在该多层结构中识别出的各个层的声学参数。然后将这些数据合并到常规线性模型中，并且已对其进行了验证并用于研究性能和进行设计。实验和理论之间的紧密联系被证明。在桨距/气门空气耦合系统中已实现了最有效的设计，与无与伦比的情况相比，接收信号幅度提高了30 dB。

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