METHOD FOR MEASURING THE PROFILE GEOMETRY OF CURVED, IN PARTICULAR CYLINDRICAL BODIES

摘要

The invention relates to a method for measuring the profile geometry of curved, in particular cylindrical bodies by means of a two-dimensional light-section method, wherein a fan-shaped light section line (2) is imaged on a sub-region of the circumferential contour of the body (4) by means of a projector (1), and the beams reflected by the surface of the body are received by a detector (3). The height profiles of the respective sub-regions of the circumferential contour, which are measured during the rotation on the body, are joined into a circumferential contour made of virtual circumferential segments of the individual height profiles, using the following steps: a) synchronized recording of the height profiles, b) imaging the height values on the circumferential segments made of data points present in a two-dimensional space, c) determining the angular position of each height profile, d) disposing the individual circumferential segments in the positions that the associated height profiles take physically on the respective sub-region of the circumferential contour by means of rotation about a common rotation point for all circumferential segments, e) determining the overlap lengths of the circumferential segments, f) rotating and displacing the circumferential segments in such a manner that the overlapping regions overlap one another in a uniform manner, erroneous angles of rotation and spatial positions thereby being corrected, wherein, during recording, the ends of adjacent height profiles partially overlap and/or the ends are extended by extrapolation and overlapping end regions of adjacent circumferential segments are formed.