期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2000
卷号：XXXIII Part B5/1
页码：650-657
出版社：Copernicus Publications
摘要：In industries where material must pass over one or more machine rolls, determining the shape and orientation of the rolls is an important element in quality co ntrol and failure prevention. This paper presents the results of research evaluating the accuracy a precise (sub-millimetre), non-contract method of roll mapping based on the use of a three- dimensional, autosynchronous laser scanner. The system produced obtains image data of a machine roll using a three-dimensional, auto-synchronous laser scanner developed by the National Research Council of Canada. This device can scan over almost any surface at speeds of 18 kHz and produce three-dimensional coordinates of surface elements within a 45 o field of view. These elements are then input into a least-squares adjustment to determine a best-fitting cylinder. The elements are then further projected onto the cylinder and their deviations output as a digital elevation map. Initial testing of the laser-scanner itself indicates that the scanner can measure 5 mm deformations in the depth direction to an accuracy of 0.3 mm on a 15m stand-off distance. This accuracy degrades linearly to the 0.9 mm level for moves of 40 mm. Relative accuracy in the vertical direction is decreased by a factor of approximately two, due to systematic errors in the laser scanner
