Method for the decoupled control of the quadrature and the resonance frequency of a micro-mechanical rotation rate sensor by means of sigma-delta-modulation

US9535084B2 · kind B2 · utility

Assignees

• Continental Teves AG & Co. OHG · DE
• Albert-Ludwigs-Universitaet Freiburg · DE

Inventors

• Markus Egretzberger · Atzenbrugg, AT
• Andreas Kugi · Wien, AT
• Florian Mair · Wien, AT
• Michael Maurer · Uerdingen, DE
• Yiannos Manoli · Glückstadt, DE
• Thomas Northemann · Gerlingen, DE

Key dates

• Filing date: Mar 17, 2011
• Grant date: Jan 3, 2017
• Expiry date: Apr 27, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C19/5726
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for the precise measuring operating of a micro-mechanical rotation rate sensor, including at least one seismic mass, at least one drive device for driving the seismic mass in the primary mode (q1) and at least three trimming electrode elements which are jointly associated directly or indirectly with the seismic mass. An electric trimming voltage (u1, u2, u3, u4) is set respectively between the trimming electrode elements and the seismic mass. Each of the electric trimming voltages (u1, u2, u3, u4) are adjusted in accordance with a resonance frequency variable (ũT, ŨT,0), a quadrature variable (ũc, ŨC,0) and a restoring variable (ũS).