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Verfahren und Vorrichtung zum berührungslosen Vermessen von Oberflächenkonturen

METHOD AND DEVICE FOR NON-CONTACT MEASURING OF SURFACE CONTOURS
 
: Heist, Stefan; Kühmstedt, Peter; Notni, Gunther

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Frontpage ()

DE 102013013791 A1: 20130814
Deutsch
Patent, Elektronische Publikation
Fraunhofer IOF ()

Abstract
The invention relates to a method for non-contact measuring of three-dimensional surface contours, wherein a sequence of stripe patterns (A1-A19), formed from a plurality of stripes, of equal stripe direction are projected on a surface (1) to be measured, wherein the stripe patterns (A1-A19) are each aperiodic and have a sinusoidal brightness distribution in a vicinity of each of the stripes and wherein, during the projecting of each of the stripe patterns (A1-A19), at least one image of the surface (1) is captured by a camera (3) or by each of at least two cameras (3). By means of the stripe pattern (A1-A19) projected on the surface (1), corresponding points (7) in the image plane of the camera (3) and of a projection device (2) used for projecting, or in the image plane of the cameras (3), are then identified by maximizing a correlation between sequences of brightness values recorded for each of the points (7), whereupon spatial coordinates of surface points (6) on the surface (1) are determined via triangulation on the basis of points (7) identified as corresponding. The invention furthermore relates to a device suitable for implementation of said method.

: http://publica.fraunhofer.de/dokumente/N-337500.html