四分之一波匹配层对杆式换能器响应的影响

2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121) Pub Date : 2000-10-22 DOI:10.1109/ULTSYM.2000.921525

B. Cugnet, J. Assaad, A. Hladky, F. Haine

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引用次数: 7

摘要

匹配层目前广泛用于大面积换能器和医疗阵列。这些层的几何和力学特性通常是借助一维设计形式来选择的。然而，它没有考虑到层内的横向波传播会破坏换能器的辐射方向图。在ATILA规范的帮助下，有限元模型允许考虑这种现象。本文研究了匹配层的力学和几何特性对横向模态形貌的影响。本研究是通过定义一个选择准则，保证在换能器的带宽没有横向模式的结论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Influence of the quarter wave matching layers on the response of bar transducers

Matching layers are widely used today for large area transducers and medical arrays. Geometrical and mechanical characteristics of these layers are usually chosen with the help of the 1D design formalism. However, it doesn't take into account of lateral waves propagation in the layer which could damage radiation pattern of the transducer. The Finite Element Model, with the help of the ATILA code, permits to take this kind of phenomenon into account. In this paper, the influence of mechanical and geometrical characteristics of the matching layer on appearance of lateral modes is examined. This study is concluded by the definition of a choice criterium guaranteeing no lateral mode in the bandwidth of the transducer.

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2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121)

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