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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >On the performance characterization of ultrasonic air transducers with radiating membranes
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On the performance characterization of ultrasonic air transducers with radiating membranes

机译：带有辐射膜的超声空气换能器的性能表征

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摘要

An ultrasonic air transducer used for sensing essentially requires an efficient transduction into the surrounding medium. A transducer consisting of a metal membrane coupled with a resonating piezoelectric disk, the latter being driven in its radial mode of vibrations, has been found to be significantly applicable in this aspect. The present study reports the performance characterization at resonance and at higher frequencies of two such transducers with different dimensions of the housings. Vibrational amplitude characteristics are studied employing phase-locked laser interferometry technique that presents sufficiently high displacement amplitude of the membrane at resonance. A consequent high-acoustic pressure field is also obtained. The design aspects for such ultrasonic air transducers with efficient transduction capability and adjustable bandwidth are discussed.
机译：用于感测的超声空气换能器本质上需要有效地传导到周围介质中。已经发现，由金属膜和谐振压电盘组成的换能器在该方面可显着应用，该谐振压电盘以其径向振动模式被驱动。本研究报告了具有不同外壳尺寸的两个这种换能器在共振和更高频率下的性能表征。使用锁相激光干涉技术研究振动振幅特性，该技术在共振时呈现出足够高的膜位移振幅。结果也获得了高声压场。讨论了这种具有高效转换能力和可调节带宽的超声空气传感器的设计方面。

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