Calibration method for magnetic field sensing devices, corresponding system, apparatus and computer program product
US10379173B2 · kind B2 · utility
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24Claims
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Key dates
| Filing date | Mar 21, 2016 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Feb 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R35/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field sensor generates signal components corresponding to an uncalibrated representation of a sensed magnetic field in a three-dimensional coordinate system. A reader coupled to the magnetic field sensor determines a center offset based on received signal components, adjusts the received signal components based on the determined center offset, and applies Kalman filtering to the adjusted signal components, generating a set of ellipsoid parameters. The reader generates calibrated signal components based on the determined center offset and the generated set of ellipsoid parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.