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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Noise analysis in air-coupled PVDF ultrasonic sensors
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Noise analysis in air-coupled PVDF ultrasonic sensors

机译：空气耦合PVDF超声传感器中的噪声分析

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摘要

In this paper we analyze the noise generated in a piezo-polymer based sensor for low frequency ultrasound in air. The sensor includes two curved PVDF transducers for medium and short range applications. A lumped RLC equivalent circuit was derived from the measurement of the transducer's electrical admittance, in air, by taking into account both mechanical and dielectric losses, which we suppose are the major sources of noise in similar devices. The electrical model was used to study and optimize the noise performance of a 61 kHz transducer and to simulate the electrical behavior of the complete transmitter-receiver system. The validity of the overall electrical model with low noise was confirmed after verifying, with Pspice, agreement of the practical and theoretical results.
机译：在本文中，我们分析了基于压电聚合物的传感器在空气中进行低频超声时产生的噪声。该传感器包括两个用于中短距离应用的弯曲PVDF传感器。考虑到机械损耗和介电损耗，我们从空气中换能器的电导率的测量中得出了集总的RLC等效电路，我们认为这是类似设备中的主要噪声源。电气模型用于研究和优化61 kHz换能器的噪声性能，并模拟整个收发器系统的电气性能。在通过Pspice验证了实际和理论结果的一致性之后，确认了低噪声总体电气模型的有效性。

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