Patent ID: 8342023
Filing Date: 2013-01-01
Classification: G01C

Abstract:
1. A Coriolis gyro having an arrangement which comprises a substrate, at least four individual structures and spring elements, wherein the spring elements couple the individual structures to the substrate and to one another, having force transmitters and having taps, wherein the arrangement has at least one excitation mode which can be excited by the force transmitters and at least one detection mode which can be measured by the taps, wherein the detection mode can be excited, in the excited excitation mode, on the basis of a Coriolis force when the Coriolis gyro is rotated about a sensitive axis, wherein the excitation mode comprises two antiphase-coupled linear oscillations, which are once again in antiphase, of in each case two of the individual structures; characterized in that the detection mode comprises either two rotary oscillations of a first and a second detection unit about their axis of symmetry parallel to the sensitive axis and of a third and a fourth detection unit about their axis of symmetry parallel to the sensitive axis, where the two rotary oscillations are coupled and in antiphase with respect to one another; or an antiphase linear oscillation of a first and a second detection unit and an antiphase linear oscillation of a third and a fourth detection unit, each of them derived from a rotary oscillation parallel to the sensitive axis via an additional spring element, wherein both rotary oscillations are coupled and in antiphase and both antiphase linear oscillations are in antiphase with respect to one another, wherein between the first and second detection units and between the third and fourth detection unit a rotary spring element is provided, respectively, each rotary spring element comprises bending beams and an anchor on the substrate and is designed to be soft in the event of torsion about the axis of symmetry of the respective rotary spring element parallel to the sensitive axis and stiff for all other loads, and with the excitation mode and the detection mode being closed eigenmodes of the arrangement, by means of which theoretically, that is to say if manufactured optimally without any manufacturing tolerances, no forces or moments can be exerted on a surrounding area of the Coriolis gyro.