Defect detection in a cylinder using an IR thermographic device and point heating

Jeong, Su Yeong; Kim, Byoung Chul; Kim, Young Han

doi:10.1109/iccas.2007.4406732

Cited by 2 publications

(2 citation statements)

References 3 publications

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“… Thermal fault location methods are used in laboratory and workshop conditions to control local inhomogeneities and conductive wire quality [13][14][15]. They are based on recording processes that occur when passing electrical pulses through a controlled wire section.…”

Section: Analysis Of Well-known Electrical Cable Fault Location Methodsmentioning

confidence: 99%

Nondestructive Testing Method Based on the Spin Polarization Effect Template

2020

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This paper proposes a novel nondestructive testing method for electrically conductive objects. It is based on applying a fundamentally new physical effect which has not been used before in nondestructive testing systems. The method utilizes spin polarization phenomena that occur when free electrons of conductive materials are exposed to an alternating electric field. Researchers experimented with wire and cable conductors. A tested cable was moving longitudinally and exposed to an alternating electric field, which excited a waveform process, i.e. the polarization of spin magnetic moments of free electrons. An induction sensor registered this process and generated a control signal: induction EMF. Its parameters were compared against that of a reference signal obtained in advance in the same way utilizing spin polarization phenomena. Parametric deviations were then used to detect and classify conductor defects. The paper describes how to generate a reference signal appropriate for the objectives of testing. The developed method enables nondestructive testing of objects made of any conductive para-and diamagnetic materials, while it accuracy and reliability are not affected by the magnitude or evenness of the object movement speed, nor by vibrations or transverse oscillations against the physical field source or the induction sensor.

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Section: Analysis Of Well-known Electrical Cable Fault Location Methodsmentioning

confidence: 99%

Nondestructive Testing Method Based on the Spin Polarization Effect Template

2020

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“…Previous work on complex defects has been performed for quantitative nondestructive evaluation (QNDE) [7]. In PEC thermography, the resulting temperature distributions based on the interaction of eddy currents with defects are visualized and features from the captured temperature distribution are extracted to obtain quantitative information for defect characterization.…”

Section: Introductionmentioning

confidence: 99%

Feature extraction using normalized cross-correlation for pulsed eddy current thermographic images

Al-Qubaa

Tian

Wilson

et al. 2010

Meas. Sci. Technol.

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Pulsed eddy current (PEC) thermography is an emerging method in the field of non-destructive testing and evaluation (NDT&E). Defects can be characterized by tracking the diffusion of heat in a sample through the analysis of a sequence of PEC thermographic images. This study takes advantage of the capabilities of PEC thermography to gain quantitative information about complex geometrical defects, i.e. angular defect characterization through the analysis of the surface thermal distribution. To conduct the analysis, a new approach using a normalized cross-correlation technique is proposed. The strength of the proposed approach lies in its ability to track the heat diffusion through sequential PEC thermographic images in a metallic sample. The results of the analysis are used to determine the dimensions of defects in the sample under test. These results have shown the effectiveness of the proposed technique in providing features which have good agreement with defect detection and evaluation.

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Defect detection in a cylinder using an IR thermographic device and point heating

Cited by 2 publications

References 3 publications

Nondestructive Testing Method Based on the Spin Polarization Effect Template

Nondestructive Testing Method Based on the Spin Polarization Effect Template

Feature extraction using normalized cross-correlation for pulsed eddy current thermographic images

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