Automatically updating hard iron and soft iron coefficients of a magnetic sensor
US9863867B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 2015 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Mar 9, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0064
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatuses, methods and systems apparatus for automatically updating hard iron and soft iron coefficients of a magnetic sensor of a device are disclosed. One method includes making measurements of a magnetic field by the magnetic sensor during rotations of the device, determining by at least a criterion whether to input the measurements of the magnetic field into a coefficient estimator, calculating, by the coefficient estimator, new hard iron and soft iron coefficients upon receiving the measurements of the magnetic field, determining a quality of the newly calculated hard iron and soft iron calculated coefficients, and updating existing hard iron and soft iron coefficients to the newly calculated hard iron and soft iron coefficients only if the quality of the newly calculated hard iron and soft iron coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.