The Dynamic Performance of Flexural Ultrasonic Transducers.
The Dynamic Performance of Flexural Ultrasonic Transducers.
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DOI：
10.3390/s18010270
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发表时间：
2018-01-18
期刊：
影响因子：
--
通讯作者：
Dixon S
中科院分区：
文献类型：
--
作者：
Feeney A;Kang L;Rowlands G;Dixon S
弯曲超声换能器主要用作接近传感器和工业计量。它们的操作依赖于压电陶瓷来产生金属膜的弯曲，从而传递超声信号。弯曲超声换能器的性能在很大程度上受限于通过指定机械谐振频率的短电压脉冲串信号的激励。然而，稳态振幅响应不是在弯曲超声换能器中从驱动激励信号瞬时产生的，并且发射换能器和接收换能器之间的驱动特性的差异会影响测量的响应。本研究探讨了弯曲超声换能器的动态性能，使用声学麦克风测量和激光多普勒测振仪，由一个详细的机械模拟模型的支持下，在一个过程中，以前没有被应用到弯曲超声换能器。这些技术用于深入了解其振动行为的物理特性，这对于优化工业超声系统至关重要。
Flexural ultrasonic transducers are principally used as proximity sensors and for industrial metrology. Their operation relies on a piezoelectric ceramic to generate a flexing of a metallic membrane, which delivers the ultrasound signal. The performance of flexural ultrasonic transducers has been largely limited to excitation through a short voltage burst signal at a designated mechanical resonance frequency. However, a steady-state amplitude response is not generated instantaneously in a flexural ultrasonic transducer from a drive excitation signal, and differences in the drive characteristics between transmitting and receiving transducers can affect the measured response. This research investigates the dynamic performance of flexural ultrasonic transducers using acoustic microphone measurements and laser Doppler vibrometry, supported by a detailed mechanical analog model, in a process which has not before been applied to the flexural ultrasonic transducer. These techniques are employed to gain insights into the physics of their vibration behaviour, vital for the optimisation of industrial ultrasound systems.
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影响因子：
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