Results 171 to 180 of about 61,541 (206)

Evaluation of coating thickness by thermal wave imaging: A comparative study of pulsed and lock-in infrared thermography – Part I: Simulation

Infrared Physics and Technology, 2017
Ranjit Shrestha, Wontae Kim
exaly   +2 more sources

Nondestructive Testing of Paint Thickness Measurement by Pulsed Infrared Thermography

2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006
In this paper, basic principles of active IR thermography are introduced, paints covered sample is excited by exterior energy with ordinary flashing lamps array, the subsequent change of surface temperature of the sample is monitored by an infrared camera, and sequence of thermal wave signal and data acquisition are processed using the computer, then ...
Liu Bo, Zhang Cun-lin, Shen Jing-ling, Feng Li-chun, Tao Ning, null Li Yan-hong, Ding You-fu, Shi Si-chao, Xu Yi-guang, Huo Yan, Zhao Shi-bin, Xu Wei-chao, Zhang Xiao-yan   +12 more
openaire   +1 more source

Detection of non emergent defects in asphalt pavement samples by long pulse and pulse phase infrared thermography

European Journal of Environmental and Civil Engineering, 2011
Des analyses par thermographie pulsee conduites sur des donnees experimentales et simulees sont presentees. Ces methodes sont appliquees a des donnees issues d'une camera infrarouge non refroidie equipee d'un detecteur matriciel a microbolometres (de moindre sensibilite thermique que les cameras refroidies).
Dumoulin, Jean, Ibos, Laurent, Marchetti, Mario, Mazioud, Atef   +3 more
openaire   +1 more source

Thermal characterization of rods, tubes and spheres using pulsed infrared thermography

Journal of Physics D: Applied Physics, 2007
In this work we analyse the accuracy of an extension of the flash method to measure the thermal diffusivity of rods, tubes and spheres, which was recently proposed by the authors. We have performed measurements in a wide set of calibrated samples of different sizes and we have found that a lower limiting size of the radius can be established for the ...
E Apiñaniz, A Mendioroz, N Madariaga, A Oleaga, R Celorrio, A Salazar   +5 more
openaire   +1 more source

Dynamic infrared multispectral imaging of paintworks by active pulsed thermography

2023
Active pulsed thermography method for characterization of complex painting structures and analysis of defects caused by ageing and environmental effects was under study. A painting (26 cm x 32 cm) of XIX century and a replica (46 cm x 55 cm) of Franz Hals (La Bohémienne 1628-1630) were analysed. Following rapid (20 ms duration) flash lamp excitation of
Semerok, Alexandre, Detalle, Vincent, Bai, Xueshi, Calligaro, Thomas, Boubanga Tombet, Stéphane   +4 more
openaire   +1 more source

Multi-Pulse Infrared Thermography Applied to Improve Defect Detectability of Composites

Applied Mechanics and Materials, 2011
Traditional pulse infrared thermography uses a single pulse with high energy to heat the specimen. For deeper or smaller defects, more energy must be conducted into the specimen to improve the detectability, which also may cause thermal impact damage in particular for composites.
Zheng Wei Yang, Wei Zhang, Gan Tian, Ren Bing Li, Yuan Jia Song   +4 more
openaire   +1 more source

Investigation of honeycomb structure using pulse infrared thermography method

SPIE Proceedings, 2010
To reduce weight and improve strength in the aerospace industry, composite structure has gained popularity as a replacement for conventional materials and structures, such as adhesive bonding and honeycomb structure. Honeycomb structures composed by a honeycomb core between two facesheets are very common on aerospace parts.
openaire   +1 more source

Evaluation of coating thickness by thermal wave imaging: A comparative study of pulsed and lock-in infrared thermography – Part II: Experimental investigation

Infrared physics & technology, 2018
In this work, we focused on the experimental arrangement of thermal wave imaging (TWI) methods for the quantitative evaluation of non-uniform topcoat thickness of thermal barrier coatings (TBCs).
R. Shrestha, Wontae Kim
semanticscholar   +1 more source

Study on the Properties of SCLAC Using Infrared Thermography and Ultrasonic Pulse Velocity

Journal of Testing and Evaluation, 2018
Abstract A densified mixture design algorithm (DMDA) was employed to produce self-consolidating lightweight aggregate concrete (SCLAC). Lightweight aggregates with different particle densities were evaluated, and the batched water density and water-to-binder (w/b) ratio were varied.
Tung-Tsan Chen, Ying-Chun Hung
openaire   +1 more source

Pulse-coupled neural network and its optimization for segmentation of electrical faults with infrared thermography

Applied Soft Computing, 2019
Abstract This paper describes a method for segmenting electrical equipment fault with infrared thermography by using pulse-coupled neural networks. The pulse coupled neuron model used in PCNN is an optimization of the original neural model, in order to easily control and alter the behavior of neuron activity. In the receptive field, the image and its
Dongguo Zhou, Ming Chi
openaire   +1 more source