Patent ID: 9157723
Filing Date: 2015-10-13
Classification: G01B

Abstract:
1. A method of determining absolute diameter of an object on a rotary table, comprising: having an assembly formed of (i) a rotary table on a base, and (ii) a support tower on the base and carrying a horizontal measurement arm with a measurement probe end, tracking the measurement probe end of the horizontal measurement arm to obtain a position in three-dimensional space of the measurement probe end of the horizontal measurement arm; using the horizontal measurement arm, measuring a plurality of points around a circumference of a subject object on the rotary table; for each measured point, determining a respective corrected point by applying a measurement arm correction to the measured point, the measurement arm correction being based on the tracked and obtained position of the measurement probe end of the measurement arm; and applying the determined corrected points in a multi-point polygon model and determining absolute diameter of the subject object.