Orientation determination for devices generating electromagnetic interference
US10209075B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2014 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Apr 7, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mechanism is provided to determine orientation of a device that includes sources of electromagnetic interference. Data generated by one or more gyroscopes in the device, in conjunction with data generated by one or more accelerometers, can be used to generate an estimate of the change of orientation of the device from the time of a last accurate magnetometer reading. In one embodiment, in order to conserve system power, the gyroscope is kept powered down or in a stand-by state until receiving a control signal to power up. The control signal is provided in advance of the source of electromagnetic interference being powered up, thereby providing an accurate starting point from which magnetometer orientation estimates may be calculated during such interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.