Method, computer program product and measuring system for operating at least one triangulation laser scanner for measuring surface coordinates of a workpiece to be measured

摘要

The invention relates to a method 40, a computer program product, a triangulation laser scanner 1 with a dimming device 6 and a measuring system 18 for measuring surface coordinates of a workpiece 7 to be measured, the method 40 comprising the following steps: providing 42 at least one triangulation laser scanner 1 with a sensor chip 11, an imaging optics 9, a laser line light source 3 for generating a laser line 16 on the workpiece 7 to be measured and a masking device 6 for masking out sections of the laser line 16; * Providing 44 a workpiece 7, the surface of which is to be measured at least two different areas 13, 14; 15 with different reflection properties and / or at least two different areas with different directions of the respective surface normals; * Detection 50 of the surface of the workpiece 7 to be measured by means of the at least one triangulation laser scanner 1 by relative movement of the at least one triangulation laser scanner 1 to the one to be measured Workpiece 7 or vice versa, whereby at least part of the surface of the workpiece 7 is covered with the laser line 16 and the actual lateral position of the image points 16 * of the laser line 16 on the sensor chip 11 is detected; * Restrict 52 with the aid of the dimming device 6 of the die Laser line 16 sweeping over the surface of the workpiece 7 to be measured onto certain subsections 16a; 16b; 16c of the laser line 16, the specific subsections 16a; 16b; 16c are selected in such a way that interference reflections resulting from the interplay between the different reflection properties and / or the different directions of the surface normals of the surface of the workpiece 7 to be measured and the pose of the triangulation laser scanner 1, taking into account the distance between the triangulation laser scanner 1 and the surface of the workpiece 7 to be measured can be reduced as much as possible; * generation 54 of surface coordinates of the workpiece 7 to be measured using the image points 16 recorded on the sensor chip 11 Position of the image points 16 * relative to the nominal position of the image points of the laser line 16 can be calculated.