Quantification and automation of pulsed thermographic NDE

被引：9

作者：

Shepard, SM ^{[1
]}

Lhota, JR ^{[1
]}

Ahmed, T ^{[1
]}

Rubadeux, BA ^{[1
]}

Wang, D ^{[1
]}

机构：

[1] Thermal Wave Imaging, Inc, Ferndale, MI 48220 USA

来源：

NONDESTRUCTIVE EVALUATION OF MATERIALS AND COMPOSITES V | 2001年 / 4336卷

关键词：

D O I：

10.1117/12.435577

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Until recently, thermographic methods for NDE have generally been quantitative, relying heavily on operator interpretation of image data. Although quantitative methods have been developed, they have generally required a priori knowledge of the sample physical properties, or identification of a defect free region within the field of view. Recent advances in pulsed thermography allow reference-free measurement of defect size, sample thickness and material properties without operator intervention or a priori knowledge of sample properties. An essential component of these advances are new signal processing methods based on both the spatial and temporal thermal response of the sample surface temperature to an instantaneous heat pulse. These methods provide a significant reduction in noise and blurring due to lateral diffusion of heat, and effectively increase the maximum penetration depth and spatial resolution beyond that of conventional thermography.

引用

页码：73 / 78

页数：6