| 红外热波脉冲位相法无损检测缺陷深度方法研究 |
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| 引用本文： | 李艳红,赵跃进,冯立春,张存林.红外热波脉冲位相法无损检测缺陷深度方法研究[J].北京理工大学学报,2008,28(2):146-149. |
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| 作者姓名： | 李艳红 赵跃进 冯立春 张存林 |
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| 作者单位： | 北京理工大学信息科学技术学院光电工程系,北京,100081;首都师范大学物理系,北京,100037 |
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| 基金项目： | 北京市自然科学基金
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国家重点基础研究发展计划(973计划) |
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| 摘 要： | 针对目前缺陷深度定量无损检测的需求,利用脉冲式红外热波无损检测脉冲激励的特点,对平底洞试件进行脉冲式红外检测实验,在VC 中通过傅里叶变换处理得到位相热图序列,分析不同深度缺陷的盲频,进而得到缺陷深度.两种材料的深度校正曲线和误差表明,脉冲位相法为缺陷深度检测提供了有效手段.
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| 关 键 词： | 脉冲位相 红外热波 傅里叶变换 盲频 深度 |
| 文章编号： | 1001-0645（2008）02-0146-04 |
| 收稿时间： | 2007-06-04 |
| 修稿时间： | 2007年6月4日 |
Pulse Phase Analysis for the Depth Measurement in Thermal Wave Nondestructive Evaluation |
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| LI Yan-hong,ZHAO Yue-jin,FENG Li-chun and ZHANG Cun-lin.Pulse Phase Analysis for the Depth Measurement in Thermal Wave Nondestructive Evaluation[J].Journal of Beijing Institute of Technology(Natural Science Edition),2008,28(2):146-149. |
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| Authors: | LI Yan-hong ZHAO Yue-jin FENG Li-chun and ZHANG Cun-lin |
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| Institution: | Department of Optical Engineering; School of Information Science and Technology; Beijing Institute of Technology; Beijing 100081; China;Department of Optical Engineering; School of Information Science and Technology; Beijing Institute of Technology; Beijing 100081; China;Department of Physics; Capital Normal University; Beijing 100037; China;Department of Physics; Capital Normal University; Beijing 100037; China |
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| Abstract: | To satisfy the increased requirements in quantitative defect depth measurements, pulse phase thermograph is proposed based on the property of pulsed infrared thermal wave nondestructive testing.Pulse phase thermograph transforms the flat bottom samples temporal signals to phase thermographs by Fourier transformation in VC++,gets the blind frequencies and calculates the depths.Initial results gave different calibrated curves and error analyses.It showed that the method provides an assistant way for subsurface defects detection of materials and structures. |
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| Keywords: | pulse phase thermography infrared thermal wave Fourier transform blind frequency defect depth |
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