Process for determining the position and the geometry of workpiece surfaces
First Claim
1. A process for determining the positioning and geometry of workpiece surfaces, comprising the steps of(a) imaging successive regions of the workpiece surface, as observed from two different observation points, onto adjacent sectors of a single combined image pickup so that mutually shifted images of each region of the workpiece surface are projected on the combined image pickup, each said region extending transversely across a welding seam extending along the workpiece surfaces and said combined image pickup being received within a casing;
- (b) determining in each of the shifted images the defined image points which result from projection of light on the surface texture and defects in the workpiece surface, each image of a selected point on the workpiece surface being on one sector of the combined image pickup and being associated with the corresponding image on the adjacent sector of the image pickup;
(c) calculating the position of the points of a predetermined area of the workpiece surface within the spatial coordinate system of the image pickup in accordance with the position of the image points on the two adjacent sectors, whereby the position of the individually defined points on the workpiece surface, the entire geometry of the observed workpiece surface, and the position of the points relative to the observation system may be determined; and
(d) moving said casing along the welding seam together with a welding torch, thereby to perform said imaging step (a) on successive regions of the welding seam during a welding operation.
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Accused Products
Abstract
In the determination of the position and geometry of workpiece surfaces, especially weld grooves in automatic arc welding, the workpiece surface or a section thereof, is imaged from two different observation points onto two image pickups. This is so that mutually shifted images of the workpiece surface are reproduced on the two image pickups. This is as well as from the position and the spacing of the defined points of the workpiece surface on the two image pickups. The position of these defined points within the spatial coordinate system of the measuring device is calculated in order to then determine from the position of all calculated points the geometry of the workpiece surface as well as the position of the latter with respect to the observation system.
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Citations
11 Claims
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1. A process for determining the positioning and geometry of workpiece surfaces, comprising the steps of
(a) imaging successive regions of the workpiece surface, as observed from two different observation points, onto adjacent sectors of a single combined image pickup so that mutually shifted images of each region of the workpiece surface are projected on the combined image pickup, each said region extending transversely across a welding seam extending along the workpiece surfaces and said combined image pickup being received within a casing; -
(b) determining in each of the shifted images the defined image points which result from projection of light on the surface texture and defects in the workpiece surface, each image of a selected point on the workpiece surface being on one sector of the combined image pickup and being associated with the corresponding image on the adjacent sector of the image pickup; (c) calculating the position of the points of a predetermined area of the workpiece surface within the spatial coordinate system of the image pickup in accordance with the position of the image points on the two adjacent sectors, whereby the position of the individually defined points on the workpiece surface, the entire geometry of the observed workpiece surface, and the position of the points relative to the observation system may be determined; and (d) moving said casing along the welding seam together with a welding torch, thereby to perform said imaging step (a) on successive regions of the welding seam during a welding operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification