Applying a correct factor derivative method for determining an orientation of a portable electronic device based on sense gravitation component linear accelerate filter data obtained
US9410809B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 2011 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Oct 6, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining an orientation of a portable or mobile electronic device includes determining an orientation of the device using at least a first inertial motion sensor (e.g., a gyroscope) with which the portable electronic device is equipped. A correction factor is provided to the orientation of the electronic device using a feedback control signal based on motion data obtained from at least a second inertial motion sensor (e.g. an accelerometer) to reduce drift in motion data obtained from the first inertial sensor. Responsive to a loss of valid motion data from the first inertial motion sensor, a rate at which the correction factor is provided to the orientation of the portable electronic device is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.