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US 8,751,190 B2Granted
Method for ascertaining a rotational direction of a rotating body, and wheel sensor module
AssigneeRobert Bosch GmbH
InventorsDominik Geisler, Axel Wenzler, Markus Brockmann
Life of this patent
Estimating the term…
Abstract
In a method for ascertaining a rotational direction of a rotating body, one rotational direction and one rotational speed value which indicates the rotational frequency of the rotating body are ascertained in each of multiple measurements. The rotational speed values of the multiple measurements are compared to each other, and a rotational direction of the rotating body is ascertained from the measured rotational directions and the comparison of the rotational speed values.
Claims11
A method for ascertaining a rotational direction of a rotating body, comprising:
- measuring, by a processor, in each of multiple measurements, one rotational direction and one rotational speed value indicating the rotational frequency of the rotating body;
- comparing, by the processor, the rotational speed values of the multiple measurements to each other;
- and
- ascertaining, by the processor, the rotational direction of the rotating body based on the measured rotational directions and the comparison of the rotational speed values;
- wherein in each of the measurements, at least two acceleration sensors each measure a gravitational acceleration with a phase shift, and the rotational speed value and the rotational direction as ascertained from the values measured by the two acceleration sensors;
- wherein for multiple measurements recorded within a specified time period, intervals of the rotational speed values relative to each other are evaluated, and the rotational direction of the rotating body is ascertained based on the evaluation;
- and
- wherein in the evaluation of the intervals of the rotational speed values relative to each other, a most significant rotational speed value is ascertained, and the rotational direction assigned to the most significant rotational speed value is determined as the rotational direction of the rotating body.
5 more elements
A method for ascertaining a rotational direction of a rotating body, comprising:
- measuring, by a processor, in each of multiple measurements, one rotational direction and one rotational speed value indicating the rotational frequency of the rotating body;
- comparing, by the processor, the rotational speed values of the multiple measurements to each other;
- and
- ascertaining, by the processor, the rotational direction of the rotating body based on the measured rotational directions and the comparison of the rotational speed values;
- wherein in each of the measurements, at least two acceleration sensors each measure a gravitational acceleration with a phase shift, and the rotational speed value and the rotational direction are ascertained from the values measured by the two acceleration sensors;
- wherein, for a first set of measurements, a centrifugal acceleration is ascertained from the values measured by the two acceleration sensors, and wherein a relationship between the ascertained centrifugal acceleration and rotational speed values is ascertained from the first set of measurements, and wherein subsequent measurements are compared to the ascertained relationship to determine whether the subsequent measurements are erroneous;
- and
- wherein a proportionality factor is ascertained from the centrifugal acceleration and rotational speed values of the first set of measurements, and wherein the proportionality factor is used to determine whether the subsequent measurements are erroneous.
5 more elements
A non-transitory computer-readable storage medium storing a computer program having codes which, when executed on a computer, perform a method for ascertaining a rotational direction of a rotating body, the method comprising:
- measuring, in each of multiple measurements, one rotational direction and one rotational speed value indicating the rotational frequency of the rotating body;
- comparing the rotational speed values of the multiple measurements to each other;
- and
- ascertaining the rotational direction of the rotating body based on the measured rotational directions and the comparison of the rotational speed values;
- wherein in each of the measurements, at least two acceleration sensors each measure a gravitational acceleration with a phase shift, and the rotational speed value and the rotational direction as ascertained from the values measured by the two acceleration sensors;
- wherein for multiple measurements recorded within a specified time period, intervals of the rotational speed values relative to each other are evaluated, and the rotational direction of the rotating body is ascertained based on the evaluation;
- and
- wherein in the evaluation of the intervals of the rotational speed values relative to each other, a most significant rotational speed value is ascertained, and the rotational direction assigned to the most significant rotational speed value is determined as the rotational direction of the rotating body.
5 more elements
Dependencies are inferred from the claim text.