Results 31 to 40 of about 4,985 (154)

Improvement the temperature signal filtering in lock-in thermography

MATEC Web of Conferences, 2018
At present, lock-in thermography is widely used non-destructive method for defects detection. The informative images in lock-in thermography (e.g. phasegram) are obtained after temperature signal filtering of the raw data.
Stoynova Anna, Bonev Borislav
doaj   +1 more source

Application of infrared thermography for estimating residual stress in ground anchors for maintenance

Scientific Reports, 2023
Characterizing the integrity of ground anchors is essential for examining their usability in the maintenance of soil structure. However, the lift-off test, which is generally used for this purpose, has limitations when applied to covering all installed ...
Dae-Hong Min, Byeong-su Jang, Hyung-Koo Yoon   +2 more
doaj   +1 more source

Sub-Surface Defect Depth Approximation in Cold Infrared Thermography

Sensors, 2022
Detection and characterisation of hidden corrosion are considered challenging yet crucial activities in many sensitive industrial plants where preventing the loss of containment or structural reliability are paramount.
Siavash Doshvarpassand, Xiangyu Wang
doaj   +1 more source

Qualitative Comparison of Lock-in Thermography (LIT) and Pulse Phase Thermography (PPT) in Mid-Wave and Long-Wave Infrared for the Inspection of Paintings

Applied Sciences, 2023
When studying paintings with active infrared thermography (IRT), minimizing the temperature fluctuations and thermal shock during a measurement becomes important.
Michaël Hillen, Seppe Sels, Bart Ribbens, Simon Verspeek, Koen Janssens, Geert Van der Snickt, Gunther Steenackers   +6 more
doaj   +1 more source

Brief Review of Vibrothermography and Optical Thermography for Defect Quantification in CFRP Material

Sensors
Quantifying defects in carbon-fiber-reinforced polymer (CFRP) composites is crucial for ensuring quality control and structural integrity. Among non-destructive evaluation techniques, thermography has emerged as a promising solution for defect detection ...
Zulham Hidayat, Nicolas P. Avdelidis, Henrique Fernandes   +2 more
doaj   +1 more source

Comparison of Pulse Thermography (PT) and Step Heating (SH) Thermography in Non-Destructive Testing of Unidirectional GFRP Composites

Fatigue of Aircraft Structures, 2019
This paper presents two techniques of active thermography i.e. the pulsed thermography technique and the step heating technique. The aim of this article is to compare these two techniques and present the possibilities, advantages and limitations of their
Kamińska Paulina, Ziemkiewcz Jarosław, Synaszko Piotr, Dragan Krzysztof   +3 more
doaj   +1 more source

Defect Recognition and Morphology Operation in Binary Images Using Line-Scanning-Based Induction Thermography

Applied Sciences, 2022
Active infrared thermography is an attractive and highly reliable technique used for the non-destructive evaluation of test objects. In this paper, defect detection on the subsurface of the STS304 metal specimen was performed by applying the line ...
Seungju Lee, Yoonjae Chung, Wontae Kim
doaj   +1 more source

On the use of infrared thermography as NDT of aerospace materials [PDF]

INCAS Bulletin, 2010
Aeronautical structures are manufactured in a large range of materials like metallic, plastic or composite. The maintenance of aerospace structures consists in conventional inspections using different Non-Destructive Evaluation (NDE) methods in order to ...
Ştefan SOROHAN, Mircea GAVAN, Andreea BORITU, Nicolae CONSTANTIN, Viorel ANGHEL   +4 more
doaj   +1 more source

Investigation of delamination in carbon fiber reinforced plastic by means of pulse thermography, shearography and active thermography [PDF]

Proceedings of Meetings on Acoustics, 2019
Carbon fiber reinforced polymer is a material widely used nowadays in different application areas. All sectors, especially the aeronautics industry, demand components of high mechanical performance, but also with high durability and reliability, hence the need for advanced health assessing methods and to monitor the integrity of the components ...
Seresini, Tommaso, Yuan, Peilong, Grüber, Jürgen, Mayr, Günther, Burgholzer, Peter, Pecoriello, Luca, Pfeiffer, Helge, Wevers, Martine, Glorieux, Christ   +8 more
openaire   +1 more source

Edge-Group Sparse Principal Component Thermography for Defect Detection in an Ancient Marquetry Sample

Proceedings, 2019
Nondestructive inspection (NDI) has immensely contributed to the restoration of historic and artistic works. As one of the most common used NDI methods, active thermography is an easy-to-operate and efficient technique. Principal component thermography (
Ching-Mei Wen, Stefano Sfarra, Gianfranco Gargiulo, Yuan Yao   +3 more
doaj   +1 more source