Visual detection of subsurface defects using enhanced magneto-optic imaging system

Cheng, Yu; Liu, Xingmake; Tian, Gui Yun; Bai, Libing

doi:10.1117/12.2014858

Cited by 3 publications

(2 citation statements)

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“…They described the current status of infrared thermal imaging technology applying deep learning and the progress and trend of fault diagnosis. Tian et al [108,109] performed a study on a fault diagnosis system for composites composed of multiple physical structures using pulsed eddy current thermography. They also performed imaging studies for visualization of this lateral defect.…”

Section: Active Thermography For Enhanced Detectabilitymentioning

confidence: 99%

Latest Advances in Common Signal Processing of Pulsed Thermography for Enhanced Detectability: A Review

2021

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Non-destructive testing (NDT) is a broad group of testing and analysis techniques used in science and industry to evaluate the properties of a material, structure, or system for characteristic defects and discontinuities without causing damage. Recently, infrared thermography is one of the most promising technologies as it can inspect a large area quickly using a non-contact and non-destructive method. Moreover, thermography testing has proved to be a valuable approach for non-destructive testing and evaluation of structural stability of materials. Pulsed thermography is one of the active thermography technologies that utilizes external energy heating. However, due to the non-uniform heating, lateral heat diffusion, environmental noise, and limited parameters of the thermal imaging system, there are some difficulties in detecting and characterizing defects. In order to improve this limitation, various signal processing techniques have been developed through many previous studies. This review presents the latest advances and exhaustive summary of representative signal processing techniques used in pulsed thermography according to physical principles and thermal excitation sources. First, the basic concept of infrared thermography non-destructive testing is introduced. Next, the principle of conventional pulsed thermography and signal processing technologies for non-destructive testing are reviewed. Then, we review advances and recent advances in each signal processing. Finally, the latest research trends are reviewed.

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Section: Active Thermography For Enhanced Detectabilitymentioning

confidence: 99%

Latest Advances in Common Signal Processing of Pulsed Thermography for Enhanced Detectability: A Review

2021

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“…There are much higher requirements for the quality of surface and subsurface of materials and components with the rapid development of manufacture processing, material, metallurgy and assembly technologies in recent years [1], Heightened safety expectation means that the relatively easy to operate and interpret while low-cost and accurate inspection techniques are highly desired. In other words, reliable detection of hidden sub-surface flaws, material microstructure and defects distribution, particularly for complex and small components is emerging as a challenge, However, devices working in special conditions such as pressure vessels or underground pipes cannot be dissembled to check every details, As a result, the Nondestructive testing is quite essential and useful [2].…”

Section: Introductionmentioning

confidence: 99%

Magneto-Optic Microscope Technology for Nondestructive Testing

Cheng

Liu

Bai

et al. 2013

AMM

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Nondestructive testing (NDT) is becoming more and more important nowadays, visual nondestructive testing (VNDT) such as imaging instead of traditional testing methods becomes popular and highly demanded, which makes it possible to see the internal state of objects visually. The magneto-optic (MO) microscope technology for nondestructive testing is detailedly introduced in this paper, include two different MO imaging system to test the buried subsurface defects in metallic and magnetic specimens.

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Detection of the crack by reducing the influence of the magnetic domain based on the MOI

Tian

Cheng

Yin

et al. 2016

2016 IEEE International Instrumentation and Measurement Technology Conference Proceedings

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Visual detection of subsurface defects using enhanced magneto-optic imaging system

Cited by 3 publications

References 0 publications

Latest Advances in Common Signal Processing of Pulsed Thermography for Enhanced Detectability: A Review

Latest Advances in Common Signal Processing of Pulsed Thermography for Enhanced Detectability: A Review

Magneto-Optic Microscope Technology for Nondestructive Testing

Detection of the crack by reducing the influence of the magnetic domain based on the MOI

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