Comparing the efficiency of defect depth characterization algorithms in the inspection of CFRP by using one-sided pulsed thermal NDT
| dc.contributor.author | Moskovchenko, Alexey | |
| dc.contributor.author | Vavilov, V. P. | |
| dc.contributor.author | Chulkov, Arsenii O. | |
| dc.date.accessioned | 2020-08-31T10:00:26Z | |
| dc.date.available | 2020-08-31T10:00:26Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | V článku je komparativně analyzováno použití osmi algoritmů pro vyhodnocení hloubky defektu v CFRP kompozitním materiálu při použití pulzní-fázové termografie. Analyticky a experimentálně jsou porovnávány algoritmy PPT, TSR, EO, ATI, TQ, NLF a NN. Je hodnocena relativní chyba stanovení hloubky defektu. Je ukázáno, že využití Fourierovy transformace je jednoduchá a robustní technika. Metoda TSR poskytuje nejvyšší kontrast defektů (SNR). Použití metody ATI umožnilo stanovení hloubky až do 1.5 mm, tato metoda je však velmi citlivá na nerovnoměrný ohřev při buzení. Metody EO a TQ přinesly horší výsledky kvůli vyššímu šumu měřeného signálu. NLF je běžná metoda pro souběžnou analýzu více parametrů, je však časově náročná a její použití pro obrazy v plném rozlišení je problematické. Nejlepší výsledky v celém rozsahu hloubek přinesla metoda NN, která je také slibným nástrojem pro automatickou detekci skrytých defektů. | cs |
| dc.description.abstract-translated | The efficiency of eight algorithms of defect depth characterization (pulse phase thermography – PPT, thermographic signal reconstruction by analyzing the first and second derivatives– TSR, early observation – EO, apparent thermal inertia – ATI, thermal quadrupoles - TQ, non-linear fitting - NLF and neural networks – NN) has been comparatively analyzed on both theoretical and experimental IR image sequences obtained in the inspection of CFRP composite. Synthetic noisefree image sequences have been calculated by means of the ThermoCalc-3D software, while experimental results have been obtained by applying a one-sided procedure of pulsed thermal NDT to the inspection of artificial defects in CFRP. A relative error in the evaluation of defect depth has been chosen as a figure of merit. It has been demonstrated that a simple and robust processing technique is the use of the Fourier transform resulting in phase-domain data (PPT). The technique of TSR ensures maximal values of signal-to-noise ratio and is less susceptible to uneven heating and lateral heat diffusion. The calculation of ATI has allowed the characterization of defects at depths up to 1.5 mm, but it is sensitive to uneven heating thus requiring to carefully choose a non-defect area. The EO method, as well as the technique of TQ, have revealed inferior results in defect depth identification because of a noisy character of raw signals. Non-linear fitting is a convenient processing technique allowing simultaneous characterization of some test parameters, such as material thermal properties, defect depth and thickness, etc., but this technique is time-consuming and can hardly be applied to full-format images. In the whole defect depth range, minimal characterization errors have been ensured by the use of the NN that is a promising tool for automated identification of hidden defects. | en |
| dc.format | 12 s. | cs |
| dc.format.mimetype | application/pdf | |
| dc.identifier.citation | MOSKOVCHENKO, A. ., VAVILOV, V. P. ., CHULKOV, A. O. . Comparing the efficiency of defect depth characterization algorithms in the inspection of CFRP by using one-sided pulsed thermal NDT. Infrared physics & Technology, 2020, roč. 107, č. JUN 2020, s. [1-11]. ISSN 1350-4495. | en |
| dc.identifier.document-number | 535387800019 | |
| dc.identifier.doi | 10.1016/j.infrared.2020.103289 | |
| dc.identifier.issn | 1350-4495 | |
| dc.identifier.obd | 43929969 | |
| dc.identifier.uri | 2-s2.0-85083001571 | |
| dc.identifier.uri | http://hdl.handle.net/11025/39576 | |
| dc.language.iso | en | en |
| dc.publisher | Elsevier | en |
| dc.relation.ispartofseries | Infrared Physics & Technology | en |
| dc.rights | Plný text není přístupný. | cs |
| dc.rights | © Elsevier | en |
| dc.rights.access | closedAccess | en |
| dc.subject | CFRP kompozity | cs |
| dc.subject | zjišťování hloubky defektu | cs |
| dc.subject | tepelný kvadrupól | cs |
| dc.subject | aktivní tepelné NDT | cs |
| dc.subject | neuronové sítě | cs |
| dc.subject.translated | CFRP composite | en |
| dc.subject.translated | Defect depth characterization | en |
| dc.subject.translated | Thermal quadrupoles | en |
| dc.subject.translated | Active thermal NDT | en |
| dc.subject.translated | Neural network | en |
| dc.title | Comparing the efficiency of defect depth characterization algorithms in the inspection of CFRP by using one-sided pulsed thermal NDT | en |
| dc.title.alternative | Srovnání algoritmů pro stanovení hloubky defektu při inspekci CFRP jednostrannou pulzní tepelnou NDT metodou | cs |
| dc.type | článek | cs |
| dc.type | preprint | cs |
| dc.type | article | en |
| dc.type | preprint | en |
| dc.type.status | Peer-reviewed | en |
| dc.type.version | publishedVersion | en |
| dc.type.version | draft | en |