Results 11 to 20 of about 670 (184)
Lock-In Thermography with Cooling for the Inspection of Composite Materials. [PDF]
Materials (Basel), 2023 This paper presents the development of the lock-in thermography system with an additional cooling system. System feasibility is tested by investigating a square-shaped glass fiber-reinforced polymer (GFRP) with artificially made outer flaws. The influence of heating mode and sinusoidal excitation period on the defect detectability is considered.
Łukaszuk RD, Marques RM, Chady T.
europepmc +3 more sources
The Impact of Excitation Periods on the Outcome of Lock-In Thermography. [PDF]
Materials (Basel), 2023 Thermal imaging is a non-destructive test method that uses an external energy source, such as a halogen lamp or flash lamp, to excite the material under test and measure the resulting temperature distribution. One of the important parameters of lock-in thermography is the number of excitation periods, which is used to calculate a phase image that shows
Sapieta M +4 more
europepmc +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
On the Thickness Quantification of Composite Materials by Using Lock-In Thermography. [PDF]
Materials (Basel), 2019 Many structural components made of composite materials need an accurate thickness control during fabrication and/or maintenance. In this regard, various non-destructive techniques can be used for the online measuring of thickness of large components such as wings and fuselage in the aerospace industry.
Palumbo D.
europepmc +5 more sources
Lock-in and pulsed thermography for solar cell testing [PDF]
Applied Optics, 2018 Inspection of solar cells is an important part of their production process because even small defects can cause a significant drop of a whole photovoltaic module performance. LED illuminated lock-in (LEDILIT) and flash-pulse thermographic techniques (FPT) were compared in this study. Lock-in methods are more commonly used for solar cell inspection. The
L. Muzika, M. Švantner, M. Kučera
openaire +4 more sources
Lock‐In Thermography to Analyze Plasmonic Nanoparticle Dispersions [PDF]
Particle & Particle Systems Characterization, 2019 AbstractThe physicochemical properties of nanoparticles (NPs) strongly rely on their colloidal stability, and any given dispersion can display remarkably different features, depending on whether it contains single particles or clusters. Thus, developing efficient experimental methods that are able to provide accurate and reproducible measures of the NP
Lukas Steinmetz +7 more
openaire +2 more sources
Eurasian Journal of Science and Engineering, 2021 Defects in masonry are difficult to detect with the naked eye. Non-destructive testing (NDT) techniques are one such ways to detect defects. One way to detect moisture is by using lock-in Infrared (IR) thermography technology.
Mohammed Fadhil Hama +1 more
doaj +1 more source
Three approaches to evaluate of the heat dissipated during fatigue crack propagation experiments
Fracture and Structural Integrity, 2020 This work is devoted to the comparative analysis of three techniques for measurement of energy dissipation in metals under fatigue crack propagation: original contact heat flux sensor, post-processing of the infrared thermography data and lock-in ...
Alena Vedernikova +3 more
doaj +1 more source
Lock-in Thermography Using Diamond Quantum Sensors
Journal of the Physical Society of Japan, 2023 Precise measurement of temperature distribution and thermal behavior in microscopic regions is critical in many research fields. We demonstrate lock-in thermography using nitrogen-vacancy centers in diamond nanoparticles. We successfully visualize thermal diffusion in glass coverslip and Teflon with micrometer resolution and deduce their thermal ...
Ogawa, Kensuke +3 more
openaire +2 more sources
Recent Progress in Infrared Thermal Imaging Nondestructive Testing Technology
Journal of Harbin University of Science and Technology, 2020 Infrared thermography is a new type of digital non destructive testing technology which has developed rapidly in recent years, because it has the advantages like convenient, efficient, intuitive, large detection area and long distance non contact ...
WEI Jia cheng +4 more
doaj +1 more source