METHOD AND APPARATUS FOR DETERMINING UPVALUE FACTORS FOR EXPANSION MEASUREMENTS ON MACHINE ELEMENTS

摘要

The present invention relates to an apparatus and a method for determining an upvalue factor for an expansion measurement in a machine element (1), comprising steps for measuring (S3) an expansion in a measurement surface portion (3) by means of an expansion measuring device (2); for measuring (S4) a displacement of a detection surface portion (4) of the machine element (1) by optical scanning; for determining (S5) a displacement field on a surface of the machine element (1) based on a model of the machine element (1) and the measured displacement of the at least one detection surface portion (4); for determining (S6) an expansion field on the surface of the machine element (1) based on the determined displacement field and the model of the machine element (1); and for determining (S7) an upvalue factor of the expansion measuring device (2) based on the determined expansion field and the measured expansion in the measurement surface portion (3).