Angle sensor with offline error correction
US11333486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2019 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Sep 22, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angle sensor can have a plurality of magnetic field sensing elements configured to detect a magnetic field and generate a respective plurality of magnetic field signals. In response to these magnetic field signals, a processor generates an uncorrected angle signal that is indicative of an angle of the magnetic field. An error corrector generates an error value using one or more of the previous samples of the uncorrected angle signal, and a summation element applies the error value to a current sample of the uncorrected angle signal to generate a corrected angle signal. The error corrector can generate the error value by applying a correction factor to a previous sample of the uncorrected angle signal, or by applying a correction factor to a predicted current sample of the uncorrected angle signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.