Research on quantitative evaluation of infrared thermography

被引：0
|
作者：
Tian, Yupeng
Zhou, Keyin
Liang, Hua
Liang, Bin
Yang, Ruyi
Yu, Shenglin
机构：
[1] College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
[2] College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
[3] Nanjing Boiler and Pressure Vessel Supervision and Inspection Institute, Nanjing 210001, China
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2008年 / 29卷 / 11期
关键词：
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学科分类号：
摘要：
In the paper, quantitative evaluation of infrared thermography is studied. Based on the heat conduction model, the relation between defect depth and time is analyzed. The concepts of initial separation time point and maximum contrast changing time point are given and their relationship with defect depth is built. Comparison with maximum contrast time point is made. The influence of defect size, external heat stimulation intensity and duration on acquired defect depth is analyzed. The changing rule of defect size is found and the best measurement time region is given. In addition, the time points of the start and end of stimulation are determined by averaging the intensity of image sequences, which sets up the base origination time point for the evaluation of defect depth.
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页码：2413 / 2418
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