Patent ID: 6311401
Filing Date: 2001-11-06
Classification: B62D,G01D,H03M

Abstract:
A steering angle sensor for determining an absolute angular value, comprising:a code disk including an absolute track having a chain code distributed over a periphery thereof indicative of absolute values of an angular position of the disk and at least has one incremental track having teeth evenly distributed over a periphery thereof for indicating a momentary stepwise angle change of the disk;means for measuring the momentary state of the incremental track and the momentary value of the absolute track; andmeans for evaluating the code disk, momentary state of the incremental track and the momentary value of the absolute track to determine the actual steering angle wherein the momentary value of the absolute track comprises a digital word corresponding to the chain code determined over a predetermined number of stepwise angle changes of the incremental track, the evaluating means determining digital information corresponding to a direction of a flank change of the momentary state of the incremental track during one of said predetermined number of stepwise angle change.