Patent ID: 7487670
Filing Date: 2009-02-10
Classification: B60C,G01P

Abstract:
1. A method for determining a direction of rotation of a rotating body about an axis of rotation, which comprises the steps of: measuring two acceleration signals x and y with at least one acceleration sensor resulting in measured acceleration signals x and y, the two acceleration signals x and y being at a 90 degree angle to each other and oriented not parallel to the axis of rotation, and both a centrifugal acceleration generated by a circular movement and a gravitational acceleration g being taken into account; differentiating mathematically the measured acceleration signals x and y resulting in a differentiated x acceleration signal and a differentiated y acceleration signal; differentiating a further time at least one of the differentiated x acceleration signal and the differentiated y acceleration signal resulting in a further differentiated x acceleration signal and/or a further differentiated y acceleration signal; and performing at least one of: