Identification and Reconstruction of Cracks in Ultrasonic Infrared Thermography

2012 ◽  
Vol 249-250 ◽  
pp. 46-50 ◽  
Author(s):  
Fu Zhou Feng ◽  
Chao Sheng Zhang ◽  
Qing Xu Min ◽  
Peng Cheng Jiang
Keyword(s):  
Image Processing ◽  
Heat Conduction ◽  
Infrared Thermography ◽  
Infrared Imaging ◽  
Ultrasonic Pulse ◽  
Detection Technique ◽  
One Dimension ◽  
Pulse Excitation ◽  
Conduction Model ◽  
Ultrasonic Infrared Thermography

Ultrasonic infrared thermography is a novel nondestructive detection technique, which combines a short ultrasonic pulse excitation and infrared imaging to detect defects, such as crack, in materials and structures. A simplified one-dimension heat-conduction model excited by ultrasonic pulses is put forward in this paper. Based on this model, a serial of image processing methods for recognition and reconstruction of cracks were presented. Results obtained show that the proposed method is creditable and applicable.

scholarly journals Nonlinear Solution to a Non-Fourier Heat Conduction Problem in a Slab Heated by Laser Source

2016 ◽  
Vol 63 (1) ◽  
pp. 129-144
Author(s):  
Mohammad Javad Noroozi ◽  
Seyfolah Saedodin ◽  
Davood Domiri Ganji
Keyword(s):  
Heat Conduction ◽  
Heat Conduction Problem ◽  
Adomian Decomposition Method ◽  
Laser Source ◽  
Temperature Dependent ◽  
Conduction Model ◽  
Non Linear Equation ◽  
Adomian Decomposition ◽  
Non Linear ◽  
Fourier Heat Conduction

Abstract The effect of laser, as a heat source, on a one-dimensional finite body was studied in this paper. The Cattaneo-Vernotte non-Fourier heat conduction model was used for thermal analysis. The thermal conductivity was assumed temperature-dependent which resulted in a non-linear equation. The obtained equations were solved using the approximate-analytical Adomian Decomposition Method (ADM). It was concluded that the non-linear analysis is important in non-Fourier heat conduction problems. Significant differences were observed between the Fourier and non-Fourier solutions which stresses the importance of non-Fourier solutions in the similar problems.

Impact of Nonequilibrium Between Electrons and Phonons on Heat Transfer in Metallic Nanoparticles Suspended in Dielectric Media

2005 ◽  
Vol 127 (12) ◽  
pp. 1400-1402 ◽  
Author(s):  
Y. Sungtaek Ju
Keyword(s):  
Heat Conduction ◽  
Metallic Nanoparticles ◽  
Energy Transport ◽  
Apparent Size ◽  
Dielectric Medium ◽  
Au Nanoparticle ◽  
Conduction Model ◽  
Metallic Structures ◽  
Atomic Vibrations ◽  
Dielectric Interfaces

Controlled heating of nanoparticles is a key enabling technology for various nanomanufacturing and biomedical applications. A theoretical study of energy transport in nanoparticles is conducted to elucidate the role of electron-phonon spatial nonequilibrium in heat conduction across metal-dielectric interfaces. The continuum two-temperature heat conduction model is shown to capture the apparent size dependence of the thermal interface resistance of Au nanoparticle suspensions. Consideration of coupling between electrons and atomic vibrations is important in understanding energy transport in nanoscale metallic structures suspended in a dielectric medium.

Infrared thermography image processing for the electromechanical fault detection on the kinematic chain

2021 ◽  
Author(s):  
Alvaro Ivan Alvarado-Hernandez ◽  
Israel Zamudio-Ramirez ◽  
Jose Alfonso Antonino-Daviu ◽  
Roque Alfredo Osornio-Rios
Keyword(s):  
Image Processing ◽  
Fault Detection ◽  
Infrared Thermography ◽  
Kinematic Chain
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