红外热成像反射法检测玻璃钢缺陷的研究  

Research on the detection of defects in glass fiber reinforced plastic with infrared thermal imaging reflectometry

作　　者：刘海宁 张敏 高珊 何柳 王金龙 LIU Haining;ZHANG Min;GAO Shan;HE Liu;WANG Jinlong(CRRC Yongji Motor Co.,Ltd.,Yongji,Shanxi 044500,China)

机构地区：[1]中车永济电机有限公司,山西永济044500

出　　处：《轨道交通材料》2025年第2期65-70,共6页Materials for Rail Transportation System

摘　　要：为研究红外热成像反射法检测玻璃钢缺陷埋深的能力,通过采用固二变一的控制变化原则,对热激励源加热功率P、热激励源加热时间t、目标试件与红外热像仪之间的距离d进行变化,分析红外热成像反射法检测的最佳检测参数。研究缺陷区域与正常试样表面温度差值出现最大值时对应的参数值,得到温度差出现最大值所对应的特征时间,以此计算缺陷的埋深。对比缺陷实际埋深,分析误差原因,研究误差与实际缺陷埋深的关系,以此得出在给定参数条件下红外热成像反射法检测的缺陷埋深,说明红外热成像反射法适用于检测近表面缺陷。In order to study the ability of infrared thermal imaging reflectometry to detect the defects beneath the surface of Glass Fiber Reinforced Plastic(GFRP),the heating power P and the heating time t of thermal excitation source and the distance d between the tar⁃get specimen and the infrared thermal imager are changed in line with the change control principle of“Fixing Two&Changing One”,and the best detection parameters of infrared thermal imaging reflectometry are analyzed.The parameter values corresponding to the maximum temperature difference between the defect area and the normal test piece surface are studied,and the characteristic time cor⁃responding to the maximum temperature difference is obtained,enabling the calculation of the buried depth of the underneath defects.By comparing the actual buried depth of the defects,analyzing the causes of errors,and studying the relationship between errors and actual defect depth,the defect depth detected by infrared thermal imaging reflectometry under given parameters is obtained,indicating that the infrared thermal imaging reflectometry is suitable for detecting near surface defects.

关 键 词：红外热成像检测 反射法 缺陷 埋深 玻璃钢 

分 类 号：U270.7[机械工程—车辆工程]