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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Characterization of a Patch Antenna Sensor’s Resonant Frequency Response in Identifying the Notch-Shaped Cracks on Metal Structure
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Characterization of a Patch Antenna Sensor’s Resonant Frequency Response in Identifying the Notch-Shaped Cracks on Metal Structure

机译：识别金属结构的缺口形裂纹时贴片天线传感器共振频率响应的表征

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摘要

Patch antenna sensor is a novel sensor that has great potential in structural health monitoring. The two resonant frequencies of a patch antenna sensor are affected by the crack on its ground plane, which enables it to sense the crack information. This paper presents a detailed characterization of the relationship between the resonant frequencies of a patch antenna sensor and notch-shaped cracks of different parameters, including the length, the orientation, and the center location. After discussing the principle of crack detection using a patch antenna sensor, a parametric study was performed to understand the response of the sensor’s resonant frequencies to various crack configurations. The results show that the crack parameters affect the resonant frequencies in a way that can be represented by the crack’s cutting effect on the sensor’s current flow. Therefore, we introduced a coefficient φ to comprehensively describe this interaction between the crack and the current distribution of the antenna radiation modes. Based on the definition of coefficient φ, an algorithm was proposed for predicting the resonant frequency shifts caused by a random notch-shaped crack and was verified by the experimental measurements. The presented study aims to provide the foundation for the future use of the patch antenna sensor in tracking the propagation of cracks of arbitrary orientation and location in metal structures.
机译：贴片天线传感器是一种新颖的传感器，在结构健康监测中具有巨大的潜力。贴片天线传感器的两个谐振频率受其接地平面上的裂纹影响，从而使其能够感应到裂纹信息。本文详细介绍了贴片天线传感器的共振频率与不同参数（包括长度，方向和中心位置）的缺口形裂纹之间的关系。在讨论了使用贴片天线传感器进行裂纹检测的原理之后，进行了参数研究，以了解传感器共振频率对各种裂纹配置的响应。结果表明，裂纹参数以一种可以通过裂纹对传感器电流的切割效应来表示的方式影响共振频率。因此，我们引入了一个系数 φ 来全面描述裂纹与天线辐射模式的电流分布之间的这种相互作用。基于系数的定义 φ ，提出了一种用于预测由随机缺口形裂纹引起的共振频率偏移的算法，并通过实验测量进行了验证。本研究旨在为将来使用贴片天线传感器跟踪金属结构中任意方向和位置的裂纹的传播提供基础。

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