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Lookup NU author(s): Dr Bin Gao,
Professor Gui Yun TianORCiD
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Emissivity variation introduces illusory temperature inhomogeneity and results in false alarms in infrared thermography, thus, it is important to separate the influence of surface emissivity variation. This letter experimentally demonstrates the advantages of phase information to reduce or enlarge the effect of surface emissivity variation with inductive pulsed phase thermography, where inductive excitation is emissivity-independent and avoids the effect of emissivity variation in heating process. The directly heated area and the indirectly heated area are divided in the phasegrams. The emissivity variation is removed or enlarged perfectly at the specific frequency and defect detectability is improved remarkably. (C) 2014 AIP Publishing LLC.
Author(s): Yang RZ, He YZ, Gao B, Tian GY
Publication type: Article
Publication status: Published
Journal: Applied Physics Letters
Print publication date: 03/11/2014
Online publication date: 07/11/2014
Acceptance date: 30/10/2014
ISSN (print): 0003-6951
ISSN (electronic): 1077-3118
Publisher: American Institute of Physics
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