Inspection on CFRP sheet with subsurface defects using pulsed thermographic technique

Bu, Chiwu; Tang, Qingju; Liu, Junyan; Wang, Yang

doi:10.1016/j.infrared.2014.04.006

Cited by 9 publications

(1 citation statement)

References 6 publications

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“…As the phase magnitudes in the defective area are much smaller than those in the surrounding area [ 18 ], phase difference between the defective and sound regions is evident to determine the locations with defects. A schematic diagram of a panel with defects at different depths is shown in Figure 1 a.…”

Section: Methodsmentioning

confidence: 99%

An Infrared Defect Sizing Method Based on Enhanced Phase Images

Wei

Mao

et al. 2020

Sensors

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Infrared thermography (IRT) is a full-field, contactless technique that has been widely used for nondestructive evaluation of structural materials due to many advantages. One of the major limitations of IRT is the fuzzy edge and low contrast in the inspected images—as well as the cost of the system. An efficient image post-processing with an affordable and portable device is of great interest to the engineering society. In this study, a convenient and economical inspection system using common halogen lamps was constructed. The corresponding image-processing scheme, which includes Fourier phase analysis and specific image enhancement was developed to identify defects with sharp and clear edges and good contrast. This system was applied to localized of defects in glass-fiber-reinforced composite panels. The results showed that defects with an effective diameter as small as 5 mm can be detected with excellent image quality. As a conclusion, the developed system provides an economic alternative to traditional infrared thermography which is able to identify defects with good qualities.

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Section: Methodsmentioning

confidence: 99%