Measuring and testing – Tire – tread or roadway – Tire inflation testing installation
Reexamination Certificate
2006-04-19
2009-02-10
Kwok, Helen C. (Department: 2856)
Measuring and testing
Tire, tread or roadway
Tire inflation testing installation
C340S442000
Reexamination Certificate
active
07487670
ABSTRACT:
A method determines a direction of rotation of a rotating body about its axis of rotation by measuring two acceleration signals x and y with an acceleration sensor. The two acceleration signals x and y are at a 90° angle to each other, are oriented not parallel to the axis of rotation, and both a centrifugal acceleration generated by a circular movement and a gravitational acceleration are taken into account. The measured acceleration signals x and y are differentiated mathematically. The differentiated x acceleration signal is differentiated a further time and correlated with a y signal that has been differentiated once for obtaining a correlation function. The differentiated y acceleration signal can be differentiated a further time and correlated with the x signal that has been differentiated once for obtaining a second correlation function. The method determines the direction of rotation of rotating tires of a motor vehicle.
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Fink Alexander
Nelles Oliver
Greenberg Laurence A.
Kwok Helen C.
Locher Ralph E.
Siemens Aktiengesellschaft
Stemer Werner H.
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