Structural health monitoring of civil engineering structures using GPR detection of patch antenna resonance frequency changes

10th International Workshop on Advanced Ground Penetrating Radar Pub Date : 2019-09-08 DOI:10.3997/2214-4609.201902599

T. Richard, D. Guilbert, A. Ihamouten, H. Gundel, C. Borderon, M. Latrach, Xavier Dérobert

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Abstract

Summary Wireless and inexpensive sensors present a great attractiveness and are of growing interest in such fields as civil engineering. In this study, the feasibility of a wireless sensing system, which consists of a patch antenna sensor and an external wireless interrogator, has been investigated. The patch antenna is designed to operate at two fundamental radiation modes (TM010 & TM001) in the L Radar-frequency band according to the IEEE standard. The ground penetrating radar (GPR) interrogator consists of a printed Ultra-wide band Vivaldi antenna which is connected to a network analyzer. In order to evaluate its ability to monitor civil engineering structures, the performed patch antenna is placed behind various controlled slabs and its resonance frequency is varied artificially. The outside GPR interrogator permits to follow the frequency shift by measuring the reflected signal of the patch antenna. A series of preliminary experimental tests were carried out in order to demonstrate the principle.

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土木工程结构健康监测采用探地雷达探测贴片天线谐振频率变化

无线和廉价的传感器具有很大的吸引力，在土木工程等领域受到越来越多的关注。本文研究了一种由贴片天线传感器和外接无线询问器组成的无线传感系统的可行性。贴片天线根据IEEE标准设计在L雷达频段的两种基本辐射模式(TM010和TM001)下工作。探地雷达(GPR)询问器由一个印刷的超宽带维瓦尔第天线组成，该天线与网络分析仪相连。为了评估其监测土木工程结构的能力，将执行的贴片天线放置在各种控制板的后面，并人为地改变其谐振频率。外部探地雷达询问器允许通过测量贴片天线的反射信号来跟踪频率移动。为了证明这一原理，进行了一系列初步的实验测试。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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10th International Workshop on Advanced Ground Penetrating Radar

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