基于红外锁相法缺陷深度检测的仿真  

Simulation of Defect Depth Detection Based on Infrared Phase Locking

作　　者：牛奕[1] 吴锡[1] 甘玲童 周德闯[2] NIU Yi;WU Xi;GAN Lingtong;ZHOU Dechuang(School of Safety Science and Emergency Management,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]武汉理工大学安全科学与应急管理学院,湖北武汉430070 [2]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026

出　　处：《红外技术》2023年第10期1059-1065,1089,共8页Infrared Technology

基　　金：国家重点研发计划(2017YFF0209704);国家自然科学基金(51706164);武汉理工大学自主创新研究基金(2018IVB056)。

摘　　要：隐藏在工件内部的粘贴结构缺陷具有隐蔽性和危险性,成为影响生产质量和运行安全的致命因素,运用红外无损检测技术可以对其缺陷进行检测和评估。本文通过仿真模拟,测得粘贴结构在不同缺陷深度以及涂层热扩散系数下的盲频率,研究了缺陷深度和涂层热扩散系数对盲频率的影响,同时利用拟合定量研究了盲频率与缺陷深度和涂层热扩散系数的关系。仿真结果表明,可以通过盲频率求得热扩散长度,进而求得缺陷深度的定量检测方法。Defects in the paste structure inside a workpiece act as a crucial factor affecting production quality and operational safety,and infrared non-destructive testing can be used to detect and evaluate defects.In this study,the blind frequency of the paste structure at different defect depths and thermal diffusivity of the coating were measured through simulations,and the influence of the defect depth and thermal diffusivity of the coating on the blind frequency was studied.Relationship between the defect depth and thermal diffusivity of the coatings.The simulation results show that the thermal diffusion length can be obtained using the blind frequency,and a quantitative detection method for the defect depth can be obtained.

关 键 词：红外无损检测 粘贴缺陷 缺陷深度检测 红外锁相 

分 类 号：TP274.52[自动化与计算机技术—检测技术与自动化装置]