Quantitative Evaluation of Pulsed Thermography, Lock-in Thermography and Vibrothermography on Foreign Object Defect (FOD) in CFRP [PDF]
Sensors, 2016 In this article, optical excitation thermographic techniques, including pulsed thermography and lock-in thermography, were used to detect foreign object defect (FOD) and delamination in CFRP.
Bin Liu +3 more
doaj +2 more sources
Automatic Thinning Detection through Image Segmentation Using Equivalent Array-Type Lamp-Based Lock-in Thermography [PDF]
Sensors, 2023 Among the non-destructive testing (NDT) techniques, infrared thermography (IRT) is an attractive and highly reliable technology that can measure the thermal response of a wide area in real-time.
Seungju Lee +3 more
doaj +2 more sources
Exploring Step-Heating and Lock-In Thermography NDT Using One-Sided Inspection on Low-Emissivity Composite Structures for New Rail Carbodies [PDF]
Sensors, 2022 This paper aims to explore the qualification of step- and lock-in heating thermography as techniques capable of inspecting new composite rail carbodies following input and inspection requirements set by the rail manufacturing industry.
Alkiviadis Tromaras, Vassilios Kappatos
doaj +2 more sources
Reconfigurable Laser-Stimulated Lock-In Thermography for Surface Micro-Crack Detection [PDF]
Sensors, 2023 Surface crack detection and sizing is essential for the manufacturing and maintenance of engines, run parts, and other metal elements of aircrafts. Among various non-destructive detection methods, the fully non-contact and non-intrusive technique based ...
Lu Ding +6 more
doaj +2 more sources
Infrared Lock-in Thermography Tests with Optical Feedback
U.Porto Journal of Engineering, 2022 Thermography using a period light stimulation. However, the results are highly dependent on the accuracy of the stimulation source and its dynamic response.
António José Ramos Silva +3 more
doaj +3 more sources
Lock-in thermography for characterization of nuclear materials [PDF]
EPJ Nuclear Sciences & Technologies, 2016 A simplified procedure of lock-in thermography was developed and applied for characterization of nuclear materials. The possibility of thickness and thermal diffusivity measurements with the accuracy better than 90% was demonstrated with different metals
Semerok Alexandre +5 more
doaj +2 more sources
Comparison of the Optical Lock-in Thermography using the Reflection Mode and the Transmission Mode [PDF]
MATEC Web of Conferences, 2022 Optical lock-in thermography is a non-destructive testing method. The surface of the sample is excited using the thermal waves and the response is recorded by the thermal camera.
Stalmach Ondrej +3 more
doaj +1 more source
Nondestructive Evaluation of BSCC Artificial Heart Valves [PDF]
MATEC Web of Conferences, 2022 The subject of investigation is a set of four artificial heart valves made of electrically conductive material, namely the alloy Ti-6Al-4V. Notches of defined geometry with gradually increasing depth were formed on these BSCC (Bjork-Shiley Convexo ...
Sapieta Milan +3 more
doaj +1 more source
Combined lock-in thermography and heat flow measurements for analysing heat dissipation during fatigue crack propagation [PDF]
Fracture and Structural Integrity, 2015 During fatigue crack propagation experiments with constant force as well as constant stress intensity lock in thermography and heat flow measurements with a new developed peltier sensor have been performed.
J. Baer, A. Vshivkov, O. Plekhov
doaj +2 more sources
Estimating Thermal Material Properties Using Solar Loading Lock-in Thermography
Applied Sciences, 2021 This work investigates the application of lock-in thermography approach for solar loading thermography applications. In conventional lock-in thermography, a specimen is subjected to a periodically changing heat flux.
Samuel Klein +2 more
doaj +1 more source