Patent ID: 9341500
Filing Date: 2016-05-17
CPC Classification: G01D

Claim Text:
1. An angle measuring device calibration method to be carried out without a reference system, with the angle device including: a code carrier carrying an absolute position code; and at least N≧2 reading heads which have a fixed, known angular position in an angular distance relative to one another, wherein a subset of the N≧2 reading heads are unequally spaced relative to an adjacent reading head of the N≧2 reading heads around the circumference of the code carrier, and each reading head built for detecting the position code at least partially, such that an absolute angular position value of the respective reading head relative to the code carrier can be determined, wherein the code carrier is rotatable relative to the reading heads and different angular positions of the code carrier relative to the reading heads can thus be taken, the method comprising: determining the absolute angle position values of the reading heads in an angular position, determining an angle error by comparing the difference between the absolute angle position values of the reading heads with the known angular position of the reading heads with respect to one another, repeating the steps of determining the absolute angle position values and the angle error for a multiplicity of varying angular positions, and carrying out a mathematical evaluation method comprising: