利用热成像控制方法检测钢筋混凝土结构裂缝的可能性

Y. Klymenko, S. Kolesnichenko, K. Polianskyi, A. Popadenko
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引用次数: 0

摘要

摘要本文介绍了利用热成像无损检测技术寻找钢筋混凝土结构裂缝的可能性的研究结果。非破坏性热控制的基础是记录当物体与环境的热力学平衡被破坏时发生的热场变化,这种变化出现在表面上,其性质允许获得必要的信息。热控制方法是基于物体的热场与热力学敏感元件(热电偶、光电探测器、液晶元件、测热计)的相互作用,将场参数(强度、温度梯度、对比度、辐射度)转换成记录装置的电信号。实验结果表明,热成像控制方法可用于检测钢筋混凝土结构的隐藏缺陷和损伤的定性评估。实验采用不同分辨率的红外图像矩阵热成像仪、红外热湿度计和亮度计作为测量仪器。在实验过程中,不同类型的红外矩阵在热像仪的使用上没有根本的区别。当使用更精确的Flir E8热像仪时,与Flir C2相比,热像图对表面温度的定义更清晰。这一特征可以用于量化缺陷,例如,一层油漆下的裂纹的深度和大小,但从根本上说,对于高质量的缺陷和损伤检测,使用更精确的设备并不是先决条件。作者得出结论,热成像控制方法可用于检查钢筋混凝土结构,以定性评估裂缝的存在。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
POSSIBILITY USING THERMOGRAPHIC CONTROL METHOD TO DETECT CRACKS IN REINFORCED CONCRETE STRUCTURES
Abstract. The article presents the study results of the possibility of using thermographic non-destructive testing to search for cracks in reinforced concrete structures. The basis of non-destructive thermal control is the registration of changes in the thermal field that occurs when the thermodynamic equilibrium of object with the environment is disturbed, which appears on the surface, and the nature of which allows obtaining the necessary information. The thermal control method is based on the interaction of the object's thermal field with thermodynamic sensitive elements (thermocouple, photodetector, liquid crystal element, bolometer), which convert the field parameters (intensity, temperature gradient, contrast, radiance) into an electrical signal of the recording device. As a result of the experiment, it was confirmed that the thermographic control method can be used when examining reinforced concrete structures for a qualitative assessment of hidden defects and damages. Thermal imagers with different resolution of the IR image matrix, an infrared thermo hygrometer, and a luxmeter were used as measuring instruments for the experiment. During the experiment, no fundamental difference in the use of thermal imagers with different types of IR matrices was revealed. When using the more accurate Flir E8 thermal imager, the thermogram had a clearer definition of the surface temperature compared to the Flir C2. This feature can be useful for quantifying defects, for example, the depth and size of a crack under a layer of paint, but fundamentally, for high-quality detection of defects and damage, the use of more accurate equipment is not a prerequisite. The authors conclude that the method of thermographic control can be used when examining reinforced concrete structures for a qualitative assessment of the presence of cracks.
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