基于超宽带步进频GPR和EMI的钢筋检测
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1.中国科学院空天信息创新研究院 北京100190;2.中国科学院电磁辐射与探测技术重点实验室 北京 100190;3.中国科学院大学电子电气与通信工程学院 北京 100049;4.广州大学土木工程学院 广州 510006

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TN95

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自然科学基金 面上项目,面向嫦娥五号探月雷达的月壤结构逆时成像和反演研究(41874120)


Reinforcing bar detection based on ULTRA-wideband Stepped Frequency GPR and EMI
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1.Institute of Space Information Innovation, Chinese Academy of Sciences, Beijing 100190, China; 2. Key Laboratory of Electromagnetic Radiation and Detection Technology, Chinese Academy of Sciences, Beijing 100190, China; 3. School of Electronics, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; 4. School of civil engineering, Guangzhou University, Guangzhou 510006, China

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    摘要:

    为更好评估建筑物质量保障建筑安全,本文对混凝土中钢筋的检测进行了研究,以实现在没有先验信息的情况下对钢筋保护层厚度和直径的准确检测。研制了超宽带步进频探地雷达和电磁感应检测模块。提出了一种相对介电常数估算方法,结合雷达数据可以得到准确的保护层厚度。进行了不同钢筋直径和保护层厚度的电磁感应标定实验,得到标定数据库。将检测所得电磁感应数据和保护层厚度与标定数据库进行匹配得到准确的钢筋直径。在混凝土试块上进行了实验,可以实现在没有先验信息下钢筋的检测,保护层厚度估计相对误差在 2%以内,钢筋直径检测无误差。证实了系统和方法的有效性和准确性,可以为建筑质量评估提供有效的技术支持。

    Abstract:

    In order to better evaluate the building quality and guarantee the building safety, this paper studies the detection of reinforcement in concrete to realize the accurate detection of the thickness of the protective layer and diameter of reinforcement without prior information. Ultra wideband stepped frequency ground penetrating radar and electromagnetic induction detection modules are developed. A relative permittivity estimation method is proposed, and the accurate thickness of protective layer can be obtained by combining radar data. The electromagnetic induction calibration experiments with different diameters and thickness of reinforcement were carried out, and the calibration database was obtained. The measured electromagnetic induction data and the thickness of protective layer are matched with the calibration database to obtain the exact diameter of reinforcement. The experiment on concrete test block shows that the steel bar can be detected without prior information, and the relative error of the thickness of the protective layer is less than 2%, and the diameter of the steel bar is detected without error. The system and method are proved to be effective and accurate, and can provide effective technical support for building quality evaluation.

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戢沁楠,周斌,钟景阳,赵迪,方广有.基于超宽带步进频GPR和EMI的钢筋检测[J].电子测量技术,2021,44(5):34-40

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  • 在线发布日期: 2024-10-24
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