Phase Lock-In Thermography for Metal Walls Characterization

被引：0

作者：

Quoc, S. Pham Tu ^{[1
]}

Cheymol, G. ^{[2
]}

Semerok, A. ^{[2
]}

机构：

[1] CEA Saclay, French Alternat Energies & Atom Energy Commiss, Div Nucl Energy, DPC SEARS LISL,CEA, Bat 467 PC132, F-91191 Gif Sur Yvette, France

[2] CEA, French Alternat Energies & Atomic Energy Commins, Div Nucl Energy, DPC/SEARS LISL, F-91191 Gif Sur Yvette, France

来源：

2013 3RD INTERNATIONAL CONFERENCE ON ADVANCEMENTS IN NUCLEAR INSTRUMENTATION, MEASUREMENT METHODS AND THEIR APPLICATIONS (ANIMMA) | 2013年

关键词：

lock-in thermography; modulated heating; phase shift; thermal diffusivity;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Phase lock-in thermography is a non-destructive and contactless technique used for characterization of materials. We present in this paper a new method to characterize the thermal diffusivity of a material by knowing, at different frequencies, the phase shift between a modulated laser power and the thermal signal of a plate sample by the laser heating. This method is based on a three dimensional analytical model of thermal Fourier amplitude. By using a numerical modeling, a new formula was found out to calculate the thermal diffusivity. We also present a developed experimental setup. It was applied to verify this method with Inox 304L, Nickel samples and it gives results with 5% accuracy. This method shows an interest for characterization of hardly accessible components which require a contactless measurement.

引用

页数：4