Patent ID: 8321176
Filing Date: 2012-11-27
Classification: G01D,Y10T

Abstract:
1. A method for determining a first angle between a first shaft section and a second shaft section, the method performed by a computer processor, comprising: supplying a first shaft signal by a first 0° position of a first shaft section; supplying a second shaft signal by a second 0° position of a second shaft section; decomposing the first shaft signal and the second shaft signal into frequency components of harmonic oscillation using Fourier analysis, dividing a plurality of respective angles of the complex pointers by the respective order for the first plurality of frequencies and the second plurality of frequencies; forming standardized complex pointers; and adding the standardized complex pointers in a complex manner, so that a first added complex pointer is formed from the first plurality of frequencies and a second added complex pointer is formed from the second plurality of frequencies, a length of the added complex pointers corresponding in each instance to an arithmetic sum of the lengths of the individual complex pointers wherein an angle spanned by the first added complex pointer and the second added complex pointer corresponds to the first angle, wherein the decomposing, dividing, forming and adding are performed by a computer processor.