Tuned coriolis angular rate measuring device
US4445375A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1981 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Feb 27, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1293
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tuned coriolis, angular rate measuring device includes a substantially hollow, generally annular rotor driven by a high-speed, synchronous spin motor. The rotor is made unsymmetrical by mounting within the rotor near its periphey at least a pair of high density masses, the respective masses being located diametrically opposite one another. The rotor is secured within a gimbal structure which is, in turn, mounted in tuned fashion upon a support housing through a cantilever spring at each end along the gimbal output axis, thereby providing bearingless, frictionless pivots permitting limited gimbal rotation. A pair of piezo-electric crystals is secured at opposite edges of one of the springs for sensing relative angular motion between the gimbal and the housing. The crystals are electrically paralleled so as to cancel any signals resulting from linear movement between the gimbal and housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.