Magnetic sensor offset detection
US11579210B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2019 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Oct 30, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0035
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A digital compass with two or more multi-axis magnetometers and a processing element to determine a heading and detect any offset error in the heading is described. One electronic device includes first and second magnetometers. The second magnetometer can be disposed at least a specified distance or co-located and offset at least a specified angle from the first magnetometer. A processing device determines a magnetic field at the electronic device using a first output from the first magnetometer, detects an offset error in the magnetic field using a second output from the second magnetometer, and reports the offset error in the magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.