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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >A block diagram model of the thickness mode piezoelectric transducer containing dual oppositely polarized piezoelectric zones
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A block diagram model of the thickness mode piezoelectric transducer containing dual oppositely polarized piezoelectric zones

机译：包含双相反极化压电区的厚度模式压电换能器的框图模型

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摘要

A unidimensional, linear systems, block diagram model of a two-layer thickness mode piezoelectric transducer is presented. The layers are subject to opposing piezoelectric polarization and the device is assumed to be loaded by semi-infinite isotropic media at the two principal faces. Block diagram representations of the transducer acting as both a generator and a receiver of ultrasound are developed in conjunction with the equivalent model of the electrical admittance. When expressed in this manner, the underlying cause and effect relationships are identified, with the important contribution of the piezoelectric boundary highlighted. Comparisons with the conventional single-layer transducer are made throughout and the major physical differences in terms of transduction performance are discussed. The new model is compared with finite element analysis and good agreement is also demonstrated with experimental data. A key aspect of the methodology is the provision of a more intuitive understanding of such device behavior. Accordingly, emphasis has been placed on the physical relationships and this is considered a major contribution of the work.
机译：提出了两层厚度模式压电换能器的一维线性系统框图模型。这些层经受相反的压电极化，并且假定该设备在两个主面上由半无限各向同性介质加载。结合等效的电导率模型，开发了既充当超声发生器又充当超声接收器的换能器的框图表示。当以这种方式表示时，就可以确定潜在的因果关系，并突出显示压电边界的重要作用。始终与常规单层换能器进行比较，并讨论了在换能性能方面的主要物理差异。将新模型与有限元分析进行比较，并通过实验数据证明了良好的一致性。该方法的关键方面是提供对这种设备行为的更直观的理解。因此，重点放在身体的关系上，这被认为是这项工作的主要贡献。

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