Process to determine the absolute angular position of a motor vehicle steering wheel
US7397394B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2006 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Jan 9, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2492
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining the absolute value of a rotational angle includes imaging a continuous segment of a code track of a code carrier on a sensor array such that the sensor array generates a corresponding output signal. The code track has a light and dark transition pattern over an angular range of 360°. The sensor array output signal is subjected to a convolution operation with a reference signal in a first correlation filter to reconstruct the light and dark transition pattern of the imaged segment of the code track as a first correlation function signal. The first correlation function signal is processed to determine a code word and a predetermined angle corresponding to the code word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.