Patent ID: 9599453
Date: 2017-03-21
CPC Classifications: G01B,G01D

Claim:
1. An apparatus for processing signals representing an angular position of a shaft of a motor, comprising: an evaluating arrangement to evaluate a rotation direction datum of the shaft; a non-transitory storage device configured to perform the following: a processing arrangement to perform a calculation using an arrival time stored most recently in the sequence and an arrival time stored previously in the sequence, and to select the previously stored time one of: (i) in the event of a rotation of the shaft in the first direction, a time required for the calculation, proceeding from the time stored most recently in the first sequence, oppositely to the first sequence; and (ii) in the event of a rotation of the shaft in the second direction, a time required for the calculation, proceeding from the time stored most recently in the second sequence, oppositely to the second sequence; wherein the storage device includes at least one address pointer which points to one of the memory location of the most recently stored time or the next free memory location, and wherein the first sequence occurs in the case of the rotation of shaft in the first direction by incrementing the address pointer, and wherein the second sequence occurs in the case of the rotation of the shaft in the second direction by decrementing the address pointer.