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相关概念视频

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
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Updated: Sep 10, 2025

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使用宽带和高度定向的PMUT阵列进行表面状况传感

Junhao Wang, Jiao Xia, Aocheng Bao

    IEEE transactions on ultrasonics, ferroelectrics, and frequency control
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    这项研究引入了用于先进材料分析的压电微加工超声波传感器 (PMUT) 阵列. 超宽带PMUT阵列能够精确检测各种介质中的超声波传播衰减系数.

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    科学领域:

    • 材料科学
    • 听力学
    • 传感器技术

    背景情况:

    • 超声波传播衰减系数检测对于材料的区分至关重要.
    • 多频超声波需要宽带传感器,这是一项技术上的挑战.

    研究的目的:

    • 开发一个超宽带的压电微加工超声波传感器 (PMUT) 阵列.
    • 证明其检测超声波衰减系数的能力.

    主要方法:

    • 在PMUT阵列中集成多个频率元素,以优化间隔.
    • 实现融合振动模式以提高带宽性能.
    • 优化阵列大小相对于波长的声波束导向性.

    主要成果:

    • 实现了230%的-6dB发射带宽和146%的脉冲回声带宽.
    • 显示一个高度定向的5°声波束有效透.
    • 冰和液体中的相关衰减系数与材料特性.

    结论:

    • 开发的PMUT阵列提供超宽带和定向声波束.
    • 它显示了识别和分析表面介质的巨大潜力.
    • 在电力系统,运输和工业生产方面有前途.