Method and device for determining a rotational frequency of a wheel
US12157453B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2019 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Jul 22, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2520/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining a rotational frequency of a wheel, in particular of a motor vehicle, uses a rate of rotation sensor that has a rotary sensor assigned to the wheel and a sensor element assigned to the rotary sensor. The rotary sensor has pulse generators that are arranged in a manner distributed over its circumference and spaced evenly from one another and whose edges are recorded by the sensor element so as to determine the rotational frequency of the rotary sensor. There is provision to use an optimal filter in order to compensate a modulation caused by an eccentricity, and to adapt modulation parameters of the optimal filter through a sequential least-squares method. A time-equidistant frequency signal is subjected to short-term averaging, for example using a PT1 filter, and the modulation is modelled as sinusoidal interference and compensated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.