Tuning fork gyroscope
US6520015B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | May 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/574
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Diapason type gyrometers using a micro-mechanical structure of vibrating beams. The gyrometer includes a micro-machined sensitive element with at least two symmetrically positioned excitation beams on each side of and parallel to a sensitive Oy axis of the gyrometer. The two beams are connected at their ends through at least one transverse element fixed in its central part to the sensitive Oy axis, to a frame through an elastic torsion return element acting in opposition to the rotation of the transverse element about the Oy axis. The elastic return elements are sized such that the variation of their resonant natural frequency in torsion with temperature is similar to the variation of the resonant natural frequency in bending of the beams with temperature. Such a device may find particular application in the measurement of the angular velocity of a mobile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.