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- L Gustafsson
- Division of Industrial Electronics, Luleå University of Technology, Luleå, Sweden
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- E Höglund
- Division of Machine Elements, Luleå University of Technology, Luleå, Sweden
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- O Marklund
- Division of Industrial Electronics, Luleå University of Technology, Luleå, Sweden
書誌事項
- 公開日
- 1994-09
- 権利情報
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- https://journals.sagepub.com/page/policies/text-and-data-mining-license
- DOI
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- 10.1243/pime_proc_1994_208_371_02
- 公開者
- SAGE Publications
この論文をさがす
説明
<jats:p>Determining lubricant film thickness between contacting bodies under elastohydrodynamic (EHD) conditions is often simulated by using a ball/cylinder and transparent disc apparatus together with an interferometry technique. The simulated contact will have a point or elliptic shape and the light used can be white or monochromatic. The interference pattern is normally photographed with a regular camera or a video camera and the pictures are then evaluated by the naked eye of the observer. In most cases, only central or minimum thicknesses are evaluated.</jats:p> <jats:p>In this paper an image processing method for the analysis of film thickness is presented. This method makes it possible to extract considerably more information about film thickness fluctuations than is achievable by the naked eye. The method primarily matches hue (but also saturation and intensity values) from digitized colour interferometric images of the unknown film shapes with calibration values obtained with known geometric shapes.</jats:p> <jats:p>The method is shown to work well in the range from 95 up to 700 nm with white light and makes the results unbiased by the observer. Furthermore, absolute film thickness can be evaluated without prior knowledge about the fringe order in the interferogram.</jats:p>
収録刊行物
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- Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
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Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 208 (3), 199-205, 1994-09
SAGE Publications