Magnetic field compensation method, associated device and computer program
US10731983B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 2018 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Apr 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A compensation method for a magnetic field on board a vehicle including the steps carried out by computer and consisting of: for each measuring time Ti, i=1 to N with N>1, collecting the measured values of the 3D magnetic field Hmi and those of the angles θi and φi, where θi is the pitch of the vehicle φi is the roll of the vehicle; determining a matrix A and a vector B as a function at least of the collected magnetic field values Hmi and angles θi et φi, i=1 to N, the matrix A representing the soft iron and nonalignment disruptions and the vector B representing the hard iron disruptions; and the method comprising a step for estimating (105) the pair (A,B) minimizing the expression where Vi=[−sin(θi); sin(φi).cos(θi); cos(φi).cos(θi)].
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.