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 +5 more sources
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
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
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 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
A Comparison among Different Ways to Investigate Composite Materials with Lock-In Thermography: The Multi-Frequency Approach [PDF]
Materials, 2021 Ester D'Accardi +2 more
exaly +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