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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Poelman, Gaétan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2023Automated woven background removal for enhanced infrared thermographic inspection of fabric composites
- 2022Broadband nonlinear elastic wave modulation spectroscopy for damage detection in compositescitations
- 2022Phase inversion in (vibro-)thermal wave imaging of materials: Extracting the AC component and filtering nonlinearitycitations
- 2021Phase inversion for accurate extraction of the harmonic thermal response in active infrared thermographic NDT
- 2021Broadband nonlinear elastic wave modulation spectroscopy for damage detection in composites
- 2021On the application of an optimized frequency-phase modulated waveform for enhanced infrared thermal wave radar imaging of compositescitations
- 2021Vibro-Thermal Wave Radar: Application of Barker Coded Amplitude Modulation for Enhanced Low-Power Vibrothermographic Inspection of Compositescitations
- 2020An experimental study on the defect detectability of time- and frequency-domain analyses for flash thermographycitations
- 2020Adaptive spectral band integration in flash thermography : enhanced defect detectability and quantification in compositescitations
- 2020A robust multi-scale gapped smoothing algorithm for baseline-free damage mapping from raw thermal images in flash thermography
- 2020Multi-scale gapped smoothing algorithm for robust baseline-free damage detection in optical infrared thermographycitations
- 2020Nonlinear Elastic Wave Energy Imaging for the Detection and Localization of In-Sight and Out-of-Sight Defects in Compositescitations
- 2020Probing the limits of full-field linear local defect resonance identification for deep defect detectioncitations
- 2020Vibrothermographic spectroscopy with thermal latency compensation for effective identification of local defect resonance frequencies of a CFRP with BVIDcitations
- 2019In-plane local defect resonances for efficient vibrothermography of impacted carbon fiber reinforced plastics (CFRP)citations
- 2019Performance of frequency and/or phase modulated excitation waveforms for optical infrared thermography of CFRPs through thermal wave radar : a simulation studycitations
- 2019Efficient automated extraction of local defect resonance parameters in fiber reinforced polymers using data compression and iterative amplitude thresholdingcitations
- 2019Sweep vibrothermography and thermal response derivative spectroscopy for identification of local defect resonance frequencies of impacted CFRPcitations
- 2018Optical infrared thermography of CFRP with artificial defects : performance of various post-processing techniquescitations
- 2018Automated extraction of local defect resonance for efficient non-destructive testing of composites
Places of action
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article
Performance of frequency and/or phase modulated excitation waveforms for optical infrared thermography of CFRPs through thermal wave radar : a simulation study
Abstract
Following the developments in pulse compression techniques for increased range resolution and higher signal tonoise ratio of radio wave radar systems, the concept of thermal wave radar (TWR) was introduced for enhanceddepth resolvability in optical infrared thermography. However, considering the highly dispersive and overlydamped behavior of heat wave, it is essential to systematically address both the opportunities and the limitationsof the approach. In this regard, this paper is dedicated to a detailed analysis of the performance of TWR ininspection of carbon fiber reinforced polymers (CFRPs) through frequency and/or phase modulation of theexcitation waveform. In addition to analogue frequency modulated (sweep) and discrete phase modulated(Barker binary coded) waveforms, a new discrete frequency-phase modulated (FPM) excitation waveform isintroduced. All waveforms are formulated based on a central frequency so that their performance can be fairlycompared to each other and to lock-in thermography at the same frequency. Depth resolvability of the waveforms,in terms of phase and lag of TWR, is firstly analyzed by an analytical solution to the 1D heat waveproblem, and further by 3D finite element analysis which takes into account the anisotropic heat diffusivity ofCFRPs, the non-uniform heating induced by the optical source and the measurement noise. The spectrum of thedefect-induced phase contrast is calculated and, in view of that, the critical influence of the chosen centralfrequency and the laminate’s thickness on the performance of TWR is discussed. Various central frequencies areexamined and the outstanding performance of TWR at relatively high excitation frequencies is highlighted,particularly when approaching the so-called blind frequency of a defect.