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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Simultaneously Determining Sensitivity and Effective Geometrical Parameters of Ultrasonic Piezoelectric Transducers Using a Self-Reciprocity Method
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Simultaneously Determining Sensitivity and Effective Geometrical Parameters of Ultrasonic Piezoelectric Transducers Using a Self-Reciprocity Method

机译：使用自互易方法同时测定超声波压电传感器的灵敏度和有效几何参数

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摘要

Determination of the sensitivity of a transducer is essential in evaluating its central frequency and effective bandwidth, its electroacoustic conversion capability, or the measurement ability of an ultrasonic test system. In this work, a calibration method based on self-reciprocity is proposed for the determination of transducer sensitivity, which can be applied to both planar and focused transducers. The two-port electrical network of the experimental setup is analyzed, and a simplified measurement procedure is described in which the "impedance mismatch" problem is solved, and only input and output currents are needed. An acoustic transfer function is introduced, both to reduce the effects of wave energy loss on the determination of transducer sensitivity and to help extract the effective geometrical parameters of the transducer through these measured output current signals. The effects of diffraction, attenuation, and effective geometrical parameters on sensitivity determination are discussed in this work; the experimental results show that when all these factors are taken into account, accurate sensitivities for both planar and focused transducers can be obtained at various experimental distances.
机译：确定换能器的灵敏度对于评估其中心频率和有效带宽，其电声转换能力或超声测试系统的测量能力至关重要。在这项工作中，提出了一种基于自可逆性的校准方法，用于确定传感器的灵敏度，该方法可应用于平面和聚焦传感器。分析了实验装置的两端口电网，并描述了简化的测量过程，其中解决了“阻抗不匹配”问题，并且仅需要输入和输出电流。引入了声传递函数，既可以减少波能量损失对换能器灵敏度的确定的影响，又可以帮助通过这些测量的输出电流信号提取换能器的有效几何参数。本文讨论了衍射，衰减和有效几何参数对灵敏度的影响。实验结果表明，考虑到所有这些因素，可以在各种实验距离下获得平面和聚焦换能器的准确灵敏度。

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