A systems model of the thickness mode piezoelectric transducer
A systems model of the thickness mode piezoelectric transducer
复制标题
厚度模式压电换能器的系统模型
DOI：
10.1121/1.391138
复制
发表时间：
1984
影响因子：
2.4
通讯作者：
T. Durrani
中科院分区：
文献类型：
--
作者：
G. Hayward;C. Macleod;T. Durrani
提出了一种新的压电超声换能器模型。利用系统工程的方法，反馈的概念被用来解释二次压电效应和清楚地描述机电相互作用。该模型由压电基本方程推导而来，它包含了传感器受到任意电和机械载荷的相关实际情况。开发了作为超声发生器和接收器的压电换能器的方框图表示。在方框图中解释了每个元素的物理意义，以提供电学和力学量之间清晰而独特的关系。这使得控制二次压电作用的因素可以很容易地定义，以及这种影响对整体传递函数的重要性。据认为，没有其他传感器模型能以同样的清晰度和技术来说明这些概念。
A new model for piezoelectric ultrasonic transducers is proposed. Using a systems engineering approach, the concept of feedback is used to explain secondary piezoelectric effects and to clearly describe electromechanical interaction. The model is derived from the fundamental piezoelectric equations and it embraces the relevant practical situations where the transducer is subject to arbitrary electrical and mechanical loading. Block diagram representations of the piezoelectric transducer acting as a generator and receiver of ultrasound are developed. The physical significance of each element in the block diagrams are explained to provide a clear and distinct relationship between electrical and mechanical quantities. This permits the factors which control secondary piezoelectric action to be readily defined, along with the importance of this effect on the overall transfer function. It is considered that no other transducer model illustrates these concepts with the same degree of clarity and the technique of...