Noise-limited thermal/infrared nondestructive testing

Noise-limited thermal/infrared nondestructive testing

Dades bibliogràfiques
Parent link:	NDT & E International Vol. 61.— 2014.— [P. 16-23]
Autor principal:	Vavilov V. P. Vladimir Platonovich
Sumari:	Title screen In thermal/infrared nondestructive testing (T/I NDT), the presence of noise in the infrared signal is an inconvenience in the method. It is convenient to introduce two extreme types of T/I NDT noise: (1) this type is purely additive and is defined by background reflections and the IR detector and (2) this is purely multiplicative and is defined by the material's absorptivity/emissivity variations. Multiple T/I NDT tests performed on various materials have shown that none of materials reveal a ‘pure? additive or multiplicative type of noise. However, in the case of optical heating, many composite and black-painted materials exhibit multiplicative noise with a noise contrast of Cn=2?5%, and this determines the defect detection limits. The Cn concept has been applied to a graphite epoxy composite to demonstrate that the maximum depth of detected defects in a one-sided procedure is about 4 mm. Also, in 1–10 mm-thick black-painted steel, the minimum detectable material loss is from 3% to 9% Режим доступа: по договору с организацией-держателем ресурса
Publicat:	2014
Matèries:	электронный ресурс труды учёных ТПУ defects дефекты infrared thermography инфракрасная термография теоретическое моделирование шумы noises
Accés en línia:	http://www.sciencedirect.com/science/article/pii/S0963869513001187
Format:	Electrònic Capítol de llibre
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=637069

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