Systems and method for gyroscope calibration
US8915116B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2013 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Jun 21, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C25/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mechanism by which a MEMS gyroscope sensor can be calibrated using data gathered from other sensors in a system incorporating the MEMS gyroscope sensor is provided. Data gathered from an accelerometer and a magnetometer in fixed orientation relative to the gyroscope is used to calculate changes in orientation of a system. A constant acceleration vector measured by the accelerometer and a constant magnetic vector measured by the magnetometer are used as reference vectors in a solution to Wahba's problem to calculate a rotation matrix providing the system's orientation with respect to those two constant vectors. By comparing changes in orientation from one time to a next time, measured rates of angular change can be calculated. The measured rates of angular change can be used along with observed gyroscope rates of angular change as input to a linear regression algorithm, which can be used to compute gyroscope trim parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.