Coriolis gyroscope having correction units and method for reducing the quadrature bias

US9052196B2 · kind B2 · utility

Assignee

• NORTHROP GRUMMAN LITEF GMBH · DE

Inventors

• Wolfram Geiger · Gomaringen, DE
• Peter Leinfelder · Ehrenkirchen, DE

Key dates

• Filing date: Feb 1, 2011
• Grant date: Jun 9, 2015
• Expiry date: Apr 22, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C19/5755
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A Coriolis gyroscope comprises a mass system that can be excited to perform vibrations parallel to a first axis, whereby a deflection of the mass system due to a Coriolis force along a second axis perpendicular to the first axis is detectable. At least one first correction unit and at least one second correction unit, which each comprise a plurality of stationary correction electrodes and moving correction electrodes whereby the stationary correction electrodes extend in the direction of the first axis and are firmly connected to the substrate by corresponding anchor structures, and the moving correction electrodes are provided as a part of the mass system. A method for reducing the quadrature bias of a Coriolis gyroscope of this type comprises applying at least temporarily constant corrective voltages to the correction units.