Comparison of quantitative defect characterization using pulse-phase and lock-in thermography

Maierhofer Christiane; Roellig Mathias; Krankenhagen Rainer; Myrach Philipp

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Comparison of quantitative defect characterization using pulse-phase and lock-in thermography

机译：使用脉冲相和锁定热成像定量缺陷表征的比较

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Using optical excitation sources for active thermography enables a contactless, remote, and non-destructive testing of materials and structures. Currently, two kinds of temporal excitation techniques have been established: pulse or flash excitation, using mostly flash lamps; and periodic or lock-in excitation, using halogen lamps, LED, or laser arrays. From the experimental point of view, both techniques have their advantages and disadvantages. Concerning the comparison of the testing results of both techniques, only very few studies have been performed in the past. In this contribution, the phase values obtained at flat bottom holes in steel and CFRP and the spatial resolution measured at crossed notches in steel using flash and lock-in excitation are compared quantitatively. (C) 2016 Optical Society of America

机译：使用光学激励源用于有源热成像，可实现非接触式，遥控器和无损性的材料和结构测试。目前，已经建立了两种时间励磁技术：脉冲或闪光激发，使用大多数闪光灯; 使用卤素灯，LED或激光阵列，周期性或锁定激励。从实验的角度来看，这两种技术都具有它们的优缺点。关于这两种技术的测试结果的比较，过去只有很少的研究。在该贡献中，定量比较在钢和CFRP的扁平底孔中获得的相位值以及在使用闪光和锁激励的钢的横向凹口中测量的空间分辨率。（c）2016年美国光学学会

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来源
《Applied optics》 |2016年第34期|共11页
作者
Maierhofer Christiane; Roellig Mathias; Krankenhagen Rainer; Myrach Philipp;
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Bundesanstalt Mat Forsch &

Prufung Div Thermog Methods 8 7 Unter Eichen 87 D-12205 Berlin Germany;

Bundesanstalt Mat Forsch &

Prufung Div Thermog Methods 8 7 Unter Eichen 87 D-12205 Berlin Germany;

Bundesanstalt Mat Forsch &

Prufung Div Thermog Methods 8 7 Unter Eichen 87 D-12205 Berlin Germany;

Bundesanstalt Mat Forsch &

Prufung Div Thermog Methods 8 7 Unter Eichen 87 D-12205 Berlin Germany;

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Comparison of quantitative defect characterization using pulse-phase and lock-in thermography

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