红外热成像法检测预制混凝土构件外饰面内部缺陷试验研究  

Experimental study on the detection of internal defects of precast concrete components by infrared thermal imaging

作　　者：许鑫浩 徐福泉[2] 刘英利 代伟明[2] Xu Xinhao;Xu Fuquan;Liu Yingli;Dai Weiming(College of Civil Engineering,North China University of Science and Technology,Tangshan 063210,China;CABR Technology Co.Ltd,Beijing 100013,China)

机构地区：[1]华北理工大学建筑工程学院,河北唐山063210 [2]建研科技股份有限公司,北京100013

出　　处：《建筑科学》2021年第7期52-59,共8页Building Science

基　　金：“十三五”国家重点研发计划项目“工业化建筑检测与评价关键技术”(2016YFC0701800)。

摘　　要：利用红外热成像仪对预制混凝土构件外墙饰面层内部缺陷进行检验,研究预制混凝土构件在日光照射下其内部缺陷区域受阳光照射后温度随着时间、空间不同的变化规律,并研究分析了内部缺陷的厚度、大小以及红外热像仪的拍摄角度和离地距离等因素。试验结果表明,尺寸大小对红外检测外饰面内部缺陷的影响程度更为明显;红外热成像检测外饰面缺陷时正对缺陷检测,检测结果更加容易进行辨别;预制混凝土构件距离地面越近,日光条件下检测效果越好,检测结果越精确。在此基础上,对外饰面内部缺陷进行了定量分析,试验结果可供实际工程应用参考。Using the infrared thermal imager to test the internal defects of the exterior wall of precast concrete components,the study of the different changes of the temperature over time and space in the light of the light of the sunlight irradiation is analyzed,and the thickness,size,and the angle and distance of the infrared thermograph are analyzed.The experimental results show that the size of the scale is more obvious to the internal defects of the exterior.The defects of the infrared thermal imaging test are made to detect the defects,and the results are easier to identify.The more the precast concrete is closer to the ground,the better the effect of daylight stimulation,the more accurate the test results.On the basis of this,the internal defects of the exterior surface are analyzed quantitatively,and the results can be used for reference.

关 键 词：预制混凝土构件 外墙饰面层 红外热成像技术 内部缺陷 检测精度 

分 类 号：TU375[建筑科学—结构工程] TU746.2