System and method of auto-calibration of inertial sensors
US8255161B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 2008 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Nov 1, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C25/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system comprises at least one inertial sensor operable to provide inertial sensor data during a trip; a processing unit coupled to the at least one inertial sensor, the processing unit operable to calculate navigation data based on the inertial sensor data and to estimate error in the inertial sensor data, wherein the processing unit is further operable to adjust subsequent inertial sensor data received during the trip from the at least one inertial sensor in order to compensate for the estimated error; and a memory coupled to the navigation unit and operable to store data between power cycles; wherein the processing unit is further operable to calculate a current trip error estimate from a plurality of error estimates during the trip and to estimate a repeatability error component based on the current trip error estimate and previous trip error estimates stored in the memory; wherein the repeatability error component is stored in the memory, the processing unit being further operable to update inertial sensor data during a subsequent trip based on the repeatability error component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.