METHOD AND DEVICE FOR CORRECTING COMPUTED TOMOGRAPHIY MEASUREMENTS, COMPRISING A COORDINATE MEASURING MACHINE

摘要

The invention relates to a device and a method for correcting the results of a computed tomography measurement of the geometry of a workpiece, the computed tomography sensor system, which consists at least of a radiation source, a two-dimensional detector and a mechanical axis of rotation for rotating the workpiece or component, being integrated into a coordinate measuring machine. To provide a simple and inexpensive method for carrying out a distortion correction, imaging errors present on the detector are corrected by measuring a calibration object in at least two relative positions between the calibration object and the detector.

主权项

1. Method for correcting radiographic images of a computed tomography measurement of geometric features or geometries of an object, such as a workpiece or component, wherein the computed tomography sensor system, comprising at least a radiation source and extended flat detector and, as appropriate, a mechanical axis of rotation for the rotation of the object, is integrated into a coordinate measuring machine, characterized in that imaging errors present on the detector are corrected by measuring of a calibration object in at least two relative positions between calibration object and detector, wherein correction values are determined from a reference displacement derived in the comparison between the relative positions and an actual displacement present in the radiographic images.