Non-destructive defect detection for MEMS devices using transient thermography

Eddy current thermography is one of the non-destructive testing techniques that provide advantages over other active thermography techniques in defect detection and analysis. The method of defect detection in eddy current thermography has become reliable due to its mode of interactions i.e. eddy current heating and heat diffusion, acquired via an infrared camera. Such ability has given the technique the advantages for non-destructive testing applications. The experimental parameters and settings which contribute towards optimum heating and defect detection capability have always been the focus of research associated with the technique. In addition, the knowledge and understanding of the characteristics heat distribution surrounding a defect is an important factor for successful inspection results. Thus, the quantitative characterisation of defect by this technique is possible compared to the conventional non-destructive which only acquired qualitative result. In this paper, a review of the eddy current thermography technique is presented which covers the physical principles of the technique, associated systems and its applications. Works on the application of the technique have been presented and discussed which demonstrates the ability of eddy current thermography for non-destructive testing of conductive materials.

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A fast non-destructive defect detection method for complex PCB surfaces

10.1109/aemcse51986.2021.00267 ◽

2021 ◽

Author(s):

Nanqing Xia ◽

Min Xia ◽

Xingsi Liu ◽

Shizhen Tang ◽

Aohan Yao ◽

...

Keyword(s):

Defect Detection ◽

Detection Method ◽

Non Destructive

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Refinement of defect detection in the contact and non-contact ultrasonic non-destructive testing of wind turbine blade using guided waves

Procedia Structural Integrity ◽

10.1016/j.prostr.2018.12.320 ◽

2018 ◽

Vol 13 ◽

pp. 1566-1570 ◽

Cited By ~ 1

Author(s):

Kumar Anubhav Tiwari ◽

Renaldas Raisutis

Keyword(s):

Wind Turbine ◽

Turbine Blade ◽

Defect Detection ◽

Guided Waves ◽

Wind Turbine Blade ◽

Non Destructive Testing ◽

Destructive Testing ◽

Non Destructive

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Pulsed Thermography Inspection of Composite Anticorrosive Coatings: Defect Detection and Analysis of Their Thermal Behavior through Computational Simulation

Materials ◽

10.3390/ma13214812 ◽

2020 ◽

Vol 13 (21) ◽

pp. 4812

Author(s):

Marcella Grosso ◽

Isabel C. P. Margarit-Mattos ◽

Gabriela R. Pereira

Keyword(s):

Thermal Behavior ◽

Defect Detection ◽

Visual Inspection ◽

Composite Coatings ◽

Computational Simulation ◽

Internal Surface ◽

Metallic Materials ◽

Pulsed Thermography ◽

Anticorrosive Coatings ◽

Non Destructive

The use of anticorrosive coatings has been a powerful method to be applied on the surface of metallic materials to mitigate the corrosive process. In this study, the focus is composite coatings that are commonly used on the internal surface of storage tanks in petrochemical industries. The development of non-destructive methods for inspection of faults in this field is desired due to unhealthy access and mainly because undercoating corrosion is difficult to detect by visual inspection. Pulsed thermography (PT) was employed to detect undercoating corrosion and adhesion loss of anticorrosive composite coatings defects. Additionally, a computational simulation model was developed to complement the PT tests. According to the experimental results, PT was able to detect all types of defects evaluated. The results obtained by computational simulation were compared with experimental ones. Good correlation (similarity) was verified, regarding both the defect detection and thermal behavior, validating the developed model. Additionally, by reconstructing the thermal behavior according to the defect parameters evaluated in the study, it was estimated the limit of the remaining thickness of the defect for which it would be possible to obtain its detection using the pulsed modality.

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