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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Optimization of buffer rod geometry for ultrasonic sensors with reference path
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Optimization of buffer rod geometry for ultrasonic sensors with reference path

机译：具有参考路径的超声波传感器的缓冲杆几何形状的优化

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摘要

Several applications of ultrasonic techniques are limited by the signal-to-noise ratio (SNR). Transducers in these applications usually operate in the pulse-echo mode. Many transducers, especially those for high temperatures, use buffer rods. Often a reference path is used to eliminate electrical and transducer drift. Interference of echo signals and noise causes errors of both amplitude and phase measurement of the detected echoes. In this paper we discuss the influence of major noise sources as a function of geometry and operating environment. The effects are studied using both experimental results and models. Although the results are applied to an ultrasonic density sensor operating in the pulse-echo mode, they are applicable to other pulse-echo mode transducers comprising homogeneous cylindrical buffer rods. This paper will show how the SNR of the density transducer was improved in a special time window from 34 to 72 dB by careful design.
机译：超声技术的几种应用受到信噪比（SNR）的限制。这些应用中的换能器通常以脉冲回波模式工作。许多传感器，尤其是高温传感器，都使用缓冲棒。通常，参考路径用于消除电气和传感器漂移。回波信号和噪声的干扰会导致检测到的回波的幅度和相位测量均出现误差。在本文中，我们讨论了主要噪声源的影响与几何形状和工作环境的关系。使用实验结果和模型来研究效果。尽管将结果应用于以脉冲回波模式操作的超声密度传感器，但它们可应用于其他包含均质圆柱形缓冲棒的脉冲回波模式传感器。本文将展示如何通过精心设计在特定的时间范围内将密度传感器的SNR从34 dB提高到72 dB。

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