Active 3-D Thermography Based on Feature-Free Registration of Thermogram Sequence and 3-D Shape Via a Single Thermal Camera

Deng, Baoyuan; Wu, Wentao; Li, Xiang; Wang, Hongjin; He, Yunze; Shen, Guoji; Tang, Yongpeng; Zhou, Ke; Zhang, Zhenjun; Wang, Yaonan

doi:10.1109/tie.2021.3120471

Cited by 13 publications

(2 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…InfraRed Thermography (IRT) is a powerful NDT technique that offers rapid, non-contact, robust non-invasive inspection and real-time monitoring. With many practical applications for A Fiber-guided Motorised Rotation Laser Scanning Thermography Technique for Impact Damage Crack Inspection in Composites ceramics, plastics, composites and coatings [11][12][13], it has presented advantages in material suitability, inspection efficiency and cost budget compared to other NDT techniques. Among multiple variants of active IRT with different heat sources, Laser Thermography (LT) manifests superior sensitivity and compatibility to crack and small subsurface defects due to its concentrating heating and thermal expanding mechanism [14].…”

Section: Introductionmentioning

confidence: 99%

A Fiber-Guided Motorized Rotation Laser Scanning Thermography Technique for Impact Damage Crack Inspection in Composites

Liu

Tinsley

Deng

et al. 2024

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

Laser Thermography manifests superior sensitivity and compatibility to detect cracks and small subsurface defects. However, the existing related systems have limitations on either inspection efficiency or unknown directional cracks due to the utilization of stationary heat sources. This article reports a Fiber-guided Motorised Rotation Laser-line Scanning Thermography (FMRLST) system aiming to rapidly inspect cracks of impact damage with unknown direction in composite laminates. An optical head with fibre delivery integrated with a rotation motor is designed and developed to generate novel scanning heating in a circumferential rotation manner. A FEM model is first proposed to simulate the principle of FMRLST testing and produce thermograms for the development of post-processing methods. A damage enhancement method based on Curvelet Transform is developed to enhance the visualization of thermal features of cracks, and purify the resulting image by suppressing the laser-line heating pattern and cancelling noise. The validation on three composite specimens with different levels of impact damage suggests the developed FMRLST system can extract unknown impact surface cracks efficiently. The remarkable sensitivity and flexibility of FMRLST to arbitrary cracks, along with the miniaturized probe-like inspection unit, present its potential in on-site thermographic inspection, and its design is promising to push the LST towards.

show abstract

Section: Introductionmentioning

confidence: 99%

A Fiber-Guided Motorized Rotation Laser Scanning Thermography Technique for Impact Damage Crack Inspection in Composites

Liu

Tinsley

Deng

et al. 2024

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

show abstract

“…Light-section vision systems are widely used in many applications for their adaptability, high accuracy, and effective cost [ 1 , 2 , 3 ], such as rail traffic monitoring [ 4 ], medical imaging [ 5 ], robotics [ 6 ], and industrial production [ 7 ]. Such systems typically comprise a camera, laser projector, and mechanical scanning platform.…”

Section: Introductionmentioning

confidence: 99%

A Novel Dynamic Light-Section 3D Reconstruction Method for Wide-Range Sensing

Chen,

Li,

Shimasaki

et al. 2024

Sensors

View full text Add to dashboard Cite

Existing galvanometer-based laser-scanning systems are challenging to apply in multi-scale 3D reconstruction because of the difficulty in achieving a balance between a high reconstruction accuracy and a wide reconstruction range. This paper presents a novel method that synchronizes laser scanning by switching the field-of-view (FOV) of a camera using multi-galvanometers. Beyond the advanced hardware setup, we establish a comprehensive geometric model of the system by modeling dynamic camera, dynamic laser, and their combined interaction. Furthermore, since existing calibration methods mainly focus on either dynamic lasers or dynamic cameras and have certain limitations, we propose a novel high-precision and flexible calibration method by constructing an error model and minimizing the objective function. The performance of the proposed method was evaluated by scanning standard components. The results show that the proposed 3D reconstruction system achieves an accuracy of 0.3 mm when the measurement range is extended to 1100 mm × 1300 mm × 650 mm. This demonstrates that for meter-scale reconstruction ranges, a sub-millimeter measurement accuracy is achieved, indicating that the proposed method realizes multi-scale 3D reconstruction and simultaneously allows for high-precision and wide-range 3D reconstruction in industrial applications.

show abstract