Noise suppression in pulsed IR thermographic NDT: Efficiency of data processing algorithms; NDT & E International; Vol. 148

Noise suppression in pulsed IR thermographic NDT: Efficiency of data processing algorithms; NDT & E International; Vol. 148

Dades bibliogràfiques
Parent link:	NDT & E International.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 148.— 2024.— Article number 103240, 15 p.
Autor corporatiu:	National Research Tomsk Polytechnic University (570)
Altres autors:	Vavilov V. P. Vladimir Platonovich, Chulkov A. O. Arseniy Olegovich, Shiryaev V. V. Vladimir Vasilyevich, Kuimova M. V. Marina Valerievna, Hai Zhang
Sumari:	Title screen Various types of noise, which accompany active TNDT procedures using optical heating, have been analyzed, both numerically and experimentally. An emphasis has been made on the suppression of surface clutter, which represents local areas of varying absorptivity/emissivity. The concept of signal-to-noise that is typically used in defect detection has been applied to fixed pattern noise in order to compare capabilities of data processing algorithms in reducing surface clutter. The experimental investigation has been fulfilled on a special sample containing both subsurface air-filled defects and areas with varying emissivity/absorptivity. The best suppression of the fixed pattern noise was provided by the complex wavelet transform and principle component analysis. Because of 3D heat diffusion, clutter spot boundaries are often underlined by particular data processing algorithms thus producing specific contours. The test situations where subsurface defects are located under localized clutter spots have been analyzed to demonstrate an overshadowing effect of such spots when detecting hidden defects Текстовый файл AM_Agreement
Idioma:	anglès
Publicat:	2024
Matèries:	электронный ресурс труды учёных ТПУ Infrared thermography Nondestructive testing Noise Data processing Modeling
Accés en línia:	https://doi.org/10.1016/j.ndteint.2024.103240
Format:	Electrònic Capítol de llibre
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=675252

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