Double Reverse Method for Calibration of Standards for Perpendicularity

Calibration of material standards for form, orientation and location is a serious metrological and technological problem. Ensuring repeatability and reproducibility of measurement results are essential for measurement accuracy and depends on a number of influencing factors related to the environment and the selection of the elements of the measurement system. In this work the double reverse method developed in NPL “KIM” at the Technical University of Sofia is presented, providing simultaneous calibration of the standard for perpendicularity and the calibration system. The results of its approbation in the study of a reference stone angle by means of a coordinate measuring machine are presented.