Toroidal shape recognition for automatic compass calibration systems and methods
US10175043B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2016 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | May 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques are disclosed for systems and methods to provide automatic and substantially continuous calibration for compasses mounted to moving structures. A compass calibration system may include a logic device configured to receive one or more sensor signals and determine a corrected magnetic field based, at least in part, on a measured local magnetic field. The logic device may be configured to receive the measured local magnetic field comprising a series of magnetic measurements associated with a mobile structure; determine a valid portion of a toroidal shape of the series of magnetic measurements that is available for further processing; and determine the corrected magnetic field based, at least in part, on calibration parameters derived from at least the valid portion of the toroidal shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.