Method for calibrating the difference in stiffness and/or quadrature of a vibrating inertial sensor
US12332080B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2021 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Mar 27, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/574
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for calibrating the stiffness mismatch ΔK or quadrature Kxy of a vibrating angular sensor includes a resonator extending about two axes x and y defining a sensor frame xy, comprising a vibrating proof mass comprising two parts configured to vibrate in phase opposition; and detection, excitation, quadrature compensation and stiffness adjustment transducers; and a stiffness matrix KO in the wave frame; the method comprising steps of: A determining the electrical angle; B recovering a quadrature or stiffness term of the stiffness matrix KO in the wave frame, the term being a sum of functions in cos(iθ) and sin(iθ); C determining the amplitudes of the functions in cos(iθ) and sin(iθ); then D determining the stiffness mismatch ΔK or the quadrature Kxy, on the basis of the amplitudes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.