Patent ID: 7751997

Claim:
A method for unambiguously determining an angular position measurement Φ of a revolving shaft, comprising the steps of using m phase-measured values α i , with 1≦i≦m, whereby the phase-measured values α 1 have different, integer periodicity values n i within an unambiguous range E of the angular position measurement Φ of the revolving shaft; based on the phase-measured values α 1 and their periodicity values n i , calculating positions T, whereby T=T (α j , n l ) and j,lεZ{l, . . . , i}; assigning obtained distances V from a distance measurement device to positions T; adding phase-measured values α i in a weighted manner to distances V to determine the angular position measurement Φ, wherein the periodicity values n i have an integer periodicity difference Δ n=|n i −n i−1 | and j,lεZ{ 1, . . . , m ], with j≠l with Δn>1; within a reduced unambiguous range E red , with E red ≈ 1 Δ ⁢ ⁢ n · E assigning the distances V to the positions T using the following scheme: V = V ⁡ ( T ) = { V 1 for ⁢ ⁢ T ≥ T O ⁢ ⁢ 1 V 2 for ⁢ ⁢ T U ⁢ ⁢ 2 ≤ T < T O ⁢ ⁢ 2 V 3 for ⁢ ⁢ T U ⁢ ⁢ 3 ≤ T < T O ⁢ ⁢ 3 … V k for ⁢ ⁢ T < T Uk in which T Uk stands for the particular lower limit, and T Ok stands for the particular upper limit of positions T, and the assignment intervals Δ T=|T Ok −T Uk | between the upper limit (T Ok ) and the lower limit (T Uk ) for positions T, and the distances ΔV=|V k+1 −V k | correspond to at least one periodicity difference Δn.