Vibratory gyroscopic rate sensor
US6978674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2002 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Sep 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/5677
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A two axis gyroscope including a substantially planar vibratory resonator (5) having a substantially ring or hoop-like structure with inner and other peripheries extending around a common axis, carrier mode drive (22) for causing the resonator (5) to vibrate in a cosnθ vibration mode, carrier mode pick-off (23) for sensing movement of the resonator (5) in response to the carrier mode drive (22), X-axis response mode pick-off (25) for detecting movement of the resonator in response to rotation about the X-axis, X-axis response mode drive (24) for nulling said motion, y-axis response mode pick-off (27) for detecting movement of the resonator in response to rotation about the y-axis, y-axis response mode drive (26) for nulling said motion, and a support (9) for flexibly supporting the resonator (5) and for allowing the resonator to vibrate relative to the support (9) in response to the carrier mode drive (22) and to applied rotation, wherein the support (9) comprises only L legs, where, when L is even:L=2N/K, andwhere, when L is odd:L=N/Kwhere K is an integer, L>2 and N is the carrier mode order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.