Mechanical decoupling device for monlithic differential vibrating sensor
First Claim
1. A sensor machined in a plane plate including two substantially identical vibrating members operating in differential mode with a common working frequency and joined to each other by a mechanical device, symmetrical about an axis perpendicular to said plate, said mechanical device comprising a frame and two connecting bridges respectively supporting said vibrating members, said frame comprising a succession of mass portions and thinned portions and being dimensioned by means of a theoretical model of vibratory behavior of said frame so that the frequency of one mode of structural resonance of said frame is substantially equal to said common working frequency, each connecting bridge being disposed in a node of vibration of said frame at said common working frequency, and said mechanical device having no plane of symmetry passing through said perpendicular axis.
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Accused Products
Abstract
A sensor comprises two identical vibrating members operating with a common working frequency and joined to each other by a mechanical decoupling device. The device comprises a frame and two connecting bridges each supporting one member. The frame comprises a succession of mass portions and thinned portions so that the frequency of one mode of structural resonance of the frame is substantially equal to the common working frequency, and each connecting bridge is disposed in a node of vibration of the frame at the common working frequency. Thus, the vibrations of the two vibrating members are decoupled from each other.
4 Citations
8 Claims
- 1. A sensor machined in a plane plate including two substantially identical vibrating members operating in differential mode with a common working frequency and joined to each other by a mechanical device, symmetrical about an axis perpendicular to said plate, said mechanical device comprising a frame and two connecting bridges respectively supporting said vibrating members, said frame comprising a succession of mass portions and thinned portions and being dimensioned by means of a theoretical model of vibratory behavior of said frame so that the frequency of one mode of structural resonance of said frame is substantially equal to said common working frequency, each connecting bridge being disposed in a node of vibration of said frame at said common working frequency, and said mechanical device having no plane of symmetry passing through said perpendicular axis.
Specification