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Inductive pulsed phase thermography for reducing or enlarging the effect of surface emissivity variation

Lookup NU author(s): Dr Bin Gao, Professor Gui Yun TianORCiD

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Abstract

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.

Publication metadata

Author(s): Yang RZ, He YZ, Gao B, Tian GY

Publication type: Article

Publication status: Published

Journal: Applied Physics Letters

Year: 2014

Volume: 105

Issue: 18

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

URL: http://dx.doi.org/10.1063/1.4901531

DOI: 10.1063/1.4901531

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