Triaxial accelerometer assembly and in-situ calibration method for improved geodetic and seismic measurements
US9645267B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2014 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | May 6, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device and method for improved geodetic and seismic measurements are disclosed. The device comprises a triaxial accelerometer assembly, mounted to a reference structure, having full scale ranges greater than +/−1 G on three orthogonal axes and a mechanism for rotating the triaxial accelerometer assembly on the reference structure. The triaxial acceleration assembly is calibrated with an internal alignment matrix such that measurements of Earth's gravity vector are rotationally invariant with respect to the direction of Earth's 1 G static gravity vector irrespective of the orientation of the triaxial assembly on the reference structure. In-situ calibrations are performed by rotating the axes of the triaxial acceleration assembly in the direction of Earth's static gravity vector. Drift of the triaxial accelerometer assembly is compensated for by measuring changes in the values of the invariant static gravity vector for each axis and correcting for the drift with new calibration coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.