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相关概念视频

Measurements of Strain01:27

Measurements of Strain

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Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.5K

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双轴灵活的频率选择性表面应变传感器,具有裂自检功能.

Xin Wang, Tao Zhou, Junlin Wang

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    此摘要是机器生成的。

    本研究引入了一种新的双轴灵活频率选择面 (FSS) 传感器,用于结构健康监测. 传感器不仅可以测量双轴应变,还可以自行检测裂,提高基础设施的安全性.

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    科学领域:

    • 电气工程 电气工程
    • 材料科学 材料科学 材料科学
    • 土木工程 土木工程是指土木工程.

    背景情况:

    • 传统的应变传感器面临着诸如复杂的布线和易受干扰等局限性.
    • 灵活的频率选择性表面 (FSS) 传感器提供无线功能,但容易受到物理损坏,如裂.

    研究的目的:

    • 开发一个双轴灵活的FSS传感器,集成裂自检能力.
    • 提高结构性健康监测系统的可靠性和安全性.

    主要方法:

    • 设计和模拟一个中心对称的补丁结构FSS传感器在Ka频段工作.
    • 在各种条件下对双轴应变传感和裂自我检测的实验验证.
    • 在多裂纹场景和500个疲劳周期下测试传感器性能.

    主要成果:

    • 传感器在32.832 GHz运行,具有极化不敏感的特性.
    • 双轴应变传感显示了700MHz/mm (无轴),1155MHz/mm (x极化) 和1260MHz/mm (y极化) 的灵敏度.
    • 通过明显的频率转移 (红色转移),有效自检水平和垂直裂,独立于裂位置或宽度.

    结论:

    • 拟议的双轴灵活的FSS传感器成功地集成了应变传感和裂自检.
    • 传感器表现出强大的机械稳定性和可靠的自我检测能力,即使在复杂的损坏下.
    • 这项技术为先进的结构健康监测提供了一个有希望的解决方案.