Patent ID: 7170279

Claim:
A method for angle measurement on the basis of at least one pair of signals, to be associated with an angle to be measured, comprising one sine-wave signal and one cosine-wave signal, which are generated by interaction of transducer wheel means with sensor means: wherein the transducer wheel means comprises two transducer wheels that are rotatable about a common pivot axis and are disposed in a manner fixed against relative rotation with respect to one another with the transducer wheels having a different number of transducer poles, wherein the sensor means comprises three sensors distributed around each transducer wheel which provide at least two pairs of signals each comprising one sine-wave signal and one cosine-wave signal, and the sine-wave signals and cosine-wave signals of the at least two pairs of signals for obtaining an averaged sine-wave signal and an averaged cosine-wave signal, and after the formation of an arc tangent signal from the averaged or unaveraged sine-wave signals and cosine-wave signals, are put computationally into relation with one another for obtaining an averaged arc tangent signal, wherein a harmonic correction of signals obtained is performed before and/or after averaging of these signals, wherein two output signals of the sensors are developed in Fourier series and Fourier coefficients which correspond to harmonics are determined and taken into consideration during a signal processing.