Detection of defects in metallic materials using an improved post-processing method of pulsed thermography

In this paper, an improved long-pulse excitation infrared nondestructive testing method is proposed, and a homogeneous pulse thermography (HPT) system is built. Based on the proposed new pulse excitation system, the problem of uneven heating in pulsed infrared non-destructive testing (NDT) has been effectively improved, and the signal-to-noise ratio of thermal images has been improved. Finally, the results of the experimental analysis and discussion show that the improved pulsed infrared NDT system greatly improves the defect detection rate and the reliability of the quantitative analysis of defect depth compared with the traditional pulsed detection system.

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Non-destructive testing based on Unet-CBAM network for pulsed thermography

Wu,

Zhu

2024

Front. Phys.

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Infrared thermography (IRT) is a non-destructive testing technique that can detect the internal defects of materials. In the detection of austenitic stainless-steel pipes with large curvature, image noise caused by uneven heating is difficult to avoid. Traditional image processing methods are less effective. According to previous works, a supervised neural network was proposed in this paper using Unet network and convolutional block attention module. Existing image processing method and networks were used to compare with the proposed method. The results show that the proposed method can remove the noise caused by uneven heating, and detect all subsurface defects in stainless-steel pipe.

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Detection of defects in metallic materials using an improved post-processing method of pulsed thermography

Cited by 3 publications

References 29 publications

Low-velocity impact damage detection in CFRP composites by applying long pulsed thermography based on post-processing techniques

Low-velocity impact damage detection in CFRP composites by applying long pulsed thermography based on post-processing techniques

Improved long pulse excitation infrared nondestructive testing evaluation

Non-destructive testing based on Unet-CBAM network for pulsed thermography

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