The electro-mechanical behaviour of flexural ultrasonic transducers
The electro-mechanical behaviour of flexural ultrasonic transducers
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DOI：
10.1063/1.4984239
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发表时间：
2017-05-29
影响因子：
4
通讯作者：
Feeney, Andrew
中科院分区：
文献类型：
--
作者：
Dixon, Steve;Kang, Lei;Feeney, Andrew
弯曲超声波换能器能够具有高机电耦合效率，用于在流体中产生或检测超声波。它们是最常见的超声波传感器类型，常用于停车传感器，因为这些设备高效、坚固且便宜。最简单的设计包括一个压电盘，该压电盘粘合到金属盖的内表面上，其表面提供了一个振动膜，用于在流体中产生或检测超声波。实验测量表明，在电压激励压电元件的过程中，存在三个特征区域，其中发射的超声波的频率在激励、稳态和最终衰减过程中发生变化。一个简单的机械模拟模型能够描述这种行为。 (C) 2017 年作者。
Flexural ultrasonic transducers are capable of high electro-mechanical coupling efficiencies for the generation or detection of ultrasound in fluids. They are the most common type of ultrasonic sensor, commonly used in parking sensors, because the devices are efficient, robust, and inexpensive. The simplest design consists of a piezoelectric disc, bonded to the inner surface of a metal cap, the face of which provides a vibrating membrane for the generation or detection of ultrasonic waves in fluids. Experimental measurements demonstrate that during the excitation of the piezoelectric element by an electrical voltage, there are three characteristic regions, where the frequency of the emitted ultrasonic wave changes during the excitation, steady-state, and the final decay process. A simple mechanical analogue model is capable of describing this behaviour. (C) 2017 Author(s).