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首页> 外文期刊>Journal of Modern Optics >Active infrared thermography applied to defect detection and characterization on asphalt pavement samples: Comparison between experiments and numerical simulations
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Active infrared thermography applied to defect detection and characterization on asphalt pavement samples: Comparison between experiments and numerical simulations

机译：主动红外热成像技术在沥青路面样品缺陷检测与表征中的应用：实验与数值模拟的比较

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摘要

This work is devoted to the application of active infrared thermography to defect detection in pavement structures. The challenge is to localize and to determine some properties of defects (e.g. shape and depth) into a highly heterogeneous material. Experimental work was carried out in laboratory conditions using a pavement sample containing two defects (wood and air). Pulsed thermography results were compared with FLUENT numerical simulations. Different preliminary approaches were investigated to analyze data: singular value decomposition of infrared image sequences, contrast image methods and computation of thermal effusivity considering a heat transfer model in a semi-infinite material. This last method is more sensitive to experimental conditions such as the presence of natural convection at a sample surface. However, all methods allow detection of one defect into the pavement sample.
机译：这项工作致力于主动红外热成像技术在路面结构缺陷检测中的应用。挑战在于将缺陷的某些特性（例如形状和深度）定位并确定为高度异质的材料。实验工作是在实验室条件下使用包含两个缺陷（木材和空气）的路面样品进行的。将脉冲热成像结果与FLUENT数值模拟进行比较。研究了不同的初步方法来分析数据：红外图像序列的奇异值分解，对比图像方法以及考虑半无限材料中传热模型的热效率计算。后一种方法对实验条件更为敏感，例如样品表面存在自然对流。但是，所有方法都允许将一种缺陷检测到路面样品中。

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