Temperature Field in Laser Line Scanning Thermography: Analytical Calculation and Experiment  

作　　者：Yin Li Yuanjia Song Zhengwei Yang Haijun Jiang Bowen Liu 

机构地区：[1]China Aerodynamics Research and Development Center,Mianyang,621000,China [2]Xi’an Research Institute of High Technology,Xi’an,710025,China [3]Nanjing Novelteq,Ltd.,Nanjing,210038,China

出　　处：《Computer Modeling in Engineering & Sciences》2023年第10期1001-1018,共18页工程与科学中的计算机建模（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52005495).

摘　　要：The temperature field in laser line scanning thermography is investigated comprehensively in this work,including analytical calculation and experiment.Firstly,the principle of laser line scanning thermography is analyzed.On this basis,a physical laser line scanning model is proposed.Afterwards,based on Fourier transform(FT)and segregation variablemethod(SVM),the heat conduction differential equation in laser line scanning thermography is derived in detail.The temperature field of the composite-based coatings model with defects is simulated numerically.The results show that the laser line scanning thermography can effectively detect the defects in the model.The correctness of the analytical calculation is verified by comparing the surface temperature distribution obtained by analytical calculation and numerical simulation.Additionally,an experiment is carried out and the changeable surface temperature obtained by analytical calculation is compared with the experimental results.It shows that the error of maximum temperature obtained by analytical calculation and by experiment is 8%with high accuracy,which proves the correctness of analytical calculation and enriches the theoretical foundation of laser line scanning thermography.

关 键 词：Temperature field laser line scanning thermography analytical calculation numerical simulation EXPERIMENT 

分 类 号：TN24[电子电信—物理电子学]