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José Beitia

The invention concerns gyrometric measurement compensated as a function of the instantaneous internal temperature of a mechanical resonator in a gyrometric measurement device comprising a loop controlling the amplitude of the resonator vibration and a gyrometric loop delivering a gyrometric signal (S); the gain control (P) of the loop varies as a monotonous function, preferably increasing and of the first order, of the internal temperature of the resonator in a given range of temperature; during a calibrating step, a correspondence is established and stored between the values of the gyrometric scaling factor (Fe) and the gyrometric bias (S) and the values of the gain control signal (F), that is F(P) and Q(P) respectively; in operation, the following operations are carried out: P&#x2192;F(P), P&#x2192;Q(P), and &#x3a9;'=F(P)&#xb7;S+Q(P) which is a more precise analog estimate, compensated as a function of the internal temperature of the resonator, of the mechanical rotation of the sensitive axis of the resonator.

Method for temperature-compensated gyrometric measurement and gyrometric measurement device using same

The invention relates to the production of a mechanical resonator with a planar monolithic vibrating structure machine in a crystalline material. Where the material is trigonal (1), trigonal (2) or hexagonal in structure, said material is cut in the [001] plane or, where said material is cubic in structure, said material is cut in the [111] plane and the vibration mode of order 2 is used. Where the material is tetragonal (1) or tetragonal (2) or hexagonal said material is cut in the [001] plane or where said material is cubic in structure said material is cut in the [001], [100], or [010] plane and the vibration mode of order 3 is used. The resonator thus has a natural material frequency isotropy (&#x394;f=0).

Method for production of a mechanical resonator with a planar monolithic vibrating structure machined in a crystalline material and resonator produced thus

The invention concerns a mechanical resonator with a planar monolithic vibrating structure extending along a closed contour whereof the axis of sensitivity is substantially perpendicular to the plane of said structure. The invention is characterised in that the planar structure () is a regular convex polygon with 4vertices () (k being the order of the vibrational mode implemented when the resonator is vibrated) and is suspended to a fixed base () via n suspension arms () with substantially radial extension arranged substantially symmetrically.

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Saint Prix, France

José Beitia