Diferenciální kolorimetrie - metoda pro stanovení tloušťky mazacích filmů

Differential Colorimetry: A tool for the analysis of fluid film lubrication.

journal article - other

en

This paper deals with some recent applications of image analysis techniques to film thickness measurement. It aims at listing the main contributions and the identified applications. We will first recall the classical technique of optical interferometry. Then, the main different approaches for the numerical treatment of interferograms are presented. It is shown that these techniques fulfil the requirements mentioned above, opening new possibilities for researchers. In the second part of the paper, applications to various problems are presented. Film thickness measurements performed on a rough static contact, then on a smooth dynamic one, under EHD and thin film regimes, are reported. Finally, from film thickness mapping, we show that it is also possible to evaluate other parameters, such as the pressure that can be determined everywhere in the contact with a very good spatial resolution.

Článek je věnován aplikaci metod počítačové analýzy obrazu na studium mazacích filmů. Jsou v něm shrnuty dosažené výsledky a ukázán přínos nové metody ve srovnání s optickou interferenčníé metodou. V článku jsou ukázány výsledky získané ve statickém kontaktu mezi tělesy s povrchovými nerovnostmi a rovněž výsledky získané pro elastohydrodynamicky mazané bodové kontakty.

This paper deals with some recent applications of image analysis techniques to film thickness measurement. It aims at listing the main contributions and the identified applications. We will first recall the classical technique of optical interferometry. Then, the main different approaches for the numerical treatment of interferograms are presented. It is shown that these techniques fulfil the requirements mentioned above, opening new possibilities for researchers. In the second part of the paper, applications to various problems are presented. Film thickness measurements performed on a rough static contact, then on a smooth dynamic one, under EHD and thin film regimes, are reported. Finally, from film thickness mapping, we show that it is also possible to evaluate other parameters, such as the pressure that can be determined everywhere in the contact with a very good spatial resolution.

lubrication films, film thickness, interferometry

2004

01.10.2002

1296-2139

Mécanique & Industries

3

6

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