The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2003
Filed:
May. 01, 2001
Karsten Hofman, Bleckede, DE;
Lap GmbH Laser Applikationen, Luneburg, DE;
Abstract
The invention relates to an apparatus and process for measuring the diameter and out-of-roundness of elongate workpieces, particularly those of round products advanced in their longitudinal direction in rolling mill trains. A reliable discrimination of orbiform-curved contours is required in measuring such workpieces. In an aspect of the invention, an apparatus is suggested with three or more laser triangulation devices, which measure the distance from the workpiece surface wherein the lasers of the triangulation device are directed to a common point of intersection which corresponds to the workpiece center and the laser beams of which span a common plane which is perpendicular to the longitudinal direction of the workpiece, and which are at angular distances which are substantially equal.