Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference (한국윤활학회:학술대회논문집)
- 1999.06a
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- Pages.147-155
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- 1999
Qualitative Analysis of Film Thickness in Elastohydrodynamic Lubrication
탄성 유체 윤활에서의 유막 두께 측정에 관한 정성적 분석
Abstract
The film thickness and shape of elastohydrodynamic lubrication is measured by optical interferometer, which is the most precise method for EHL film measurement. However the interpretation of the image pattern from optical viscometer is not easy for two-dimensional shape. A newly developed method of image processing makes it possible to evaluate the film thickness and shape in every point of contact region with two dimensional aspects. In this study, we captured film shape of EHL film from the monochromatic incident light with the Image processing method, which uses phase shift method, and obtained the image analysis method for gray level image in order to qualitatively evaluate film shapes.
Keywords
- EHL;
- image processing;
- optical interferometer;
- film thickness monochromatic incident light;
- fringes;
- phase shift