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Integration study among flying spot laser thermography and terahertz technique for the inspection of panel paintings

2022 ◽  
Author(s):  
Stefano Sfarra ◽  
Ludovic Gavérina ◽  
Christophe Pradere ◽  
Alain Sommier ◽  
Jean-Christophe Batsale
Keyword(s):  
Panel Paintings ◽  
Flying Spot

scholarly journals Detection of Surface Breaking Cracks Using Flying Line Laser Thermography: A Canny-Based Algorithm

2021 ◽  
Vol 8 (1) ◽  
pp. 22
Author(s):  
Nelson W. Pech-May ◽  
Mathias Ziegler
Keyword(s):  
Crack Detection ◽  
Experimental Measurements ◽  
Non Destructive Testing ◽  
Automated Systems ◽  
Destructive Testing ◽  
Metallic Component ◽  
Industrial Use ◽  
Non Destructive ◽  
Flying Spot

In this work, we introduce a new algorithm for effectual crack detection using flying line laser thermography, based on the well-known Canny approach. The algorithm transforms the input thermographic sequence into an edge map. Experimental measurements are performed on a metallic component that contains surface breaking cracks due to industrial use. The specimen is tested using flying line thermography at different scanning speeds and laser input powers. Results obtained with the proposed algorithm are additionally compared with a previously established algorithm for flying spot thermography. The proposed Canny-based algorithm can be used in automated systems for thermographic non-destructive testing.

Improved Flying-Spot Projector Design for Dense Dynamic Light-Transport Capture

2021 ◽  
Author(s):  
Xiaomeng Liu ◽  
Kristofer Henderson ◽  
Joshua Rego ◽  
Suren Jayasuriya ◽  
Sanjeev Koppal
Keyword(s):  
Light Transport ◽  
Flying Spot

scholarly journals Flying spot thermography: Quantitative assessment of thermal diffusivity and crack width

2020 ◽  
Vol 127 (13) ◽  
pp. 131101
Author(s):  
Agustín Salazar ◽  
Arantza Mendioroz ◽  
Alberto Oleaga
Keyword(s):  
Thermal Diffusivity ◽  
Crack Width ◽  
Quantitative Assessment ◽  
Flying Spot

scholarly journals Spatial heterodyne flying spot technique for in-situ thermal characterisation of metallic sample under tensile test

2020 ◽  
Author(s):  
A. Sommier ◽  
O. Plekhov ◽  
T. Palin-Luc ◽  
E. Abisset ◽  
J.C. Batsale ◽  
...  
Keyword(s):  
Tensile Test ◽  
Metallic Sample ◽  
Flying Spot

scholarly journals Constant Velocity Flying Spot for the estimation of in-plane thermal diffusivity on anisotropic materials

2019 ◽  
Vol 145 ◽  
pp. 106000 ◽  
Author(s):  
L. Gaverina ◽  
M. Bensalem ◽  
A. Bedoya ◽  
J. González ◽  
A. Sommier ◽  
...  
Keyword(s):  
Thermal Diffusivity ◽  
Constant Velocity ◽  
Anisotropic Materials ◽  
Flying Spot

Flying-spot thermography: measuring the in-plane (an)isotropic thermal diffusivity of large and complex parts

2019 ◽  
Author(s):  
Adrián Bedoya ◽  
Jorge González ◽  
Arantza Mendioroz ◽  
Christophe Pradere ◽  
Alain Sommier ◽  
...  
Keyword(s):  
Thermal Diffusivity ◽  
Complex Parts ◽  
Flying Spot
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