Method for calibration of magnetic sensor
US10151805B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 18, 2015 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Oct 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R35/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method includes acquiring magnetic data from a magnetometer, processing the magnetic data to perform robust calibration, and generating optimum calibration parameters using a calibration status indicator. To that end, the method includes generating a calibration status indicator as a function of time elapsed since a last calibration and variation in total magnetic field in previously stored magnetic data, detecting anomalies, and extracting a sparse magnetic data set using comparison between the previously stored magnetic data and the magnetic data. Calibration parameters are generated for the magnetometer using a calibration method as a function of the magnetic data set. The calibration parameters are stored based on performing a validation and stability check on the calibration parameters, and weighted with the previously stored calibration parameters to produce weighted calibration parameters. Calibration settings are generated as a function of the weighted calibration parameters, if the weighted calibration parameters were produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.