Magnetic sensor calibration for aircraft
US9671226B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2014 |
| Grant date | Jun 6, 2017 |
| Priority date | — |
| Expiry date | Apr 8, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0035
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of magnetic sensor calibration for aircraft comprises obtaining attitude data, heading angle data, position data, and date information; inputting the position data and date into an earth magnetic field (EMF) model and into an EMF model correction map; inputting the attitude and heading angle data into a NOLL to body frame transformation module; outputting an EMF model vector from the EMF model; outputting an EMF correction vector from the EMF model correction map; compensating the EMF model vector with the EMF correction vector to produce a corrected EMF model vector; inputting the corrected EMF model vector into the transformation module; inputting magnetic field measurements data into a calibration processing unit; inputting true earth magnetic field data from the transformation module into the processing unit; computing compensation coefficients in the processing unit based on the magnetic field measurements and the true earth magnetic field; and storing the compensation coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.