Onera (office National D'etudes Et De Recherches Aerospatiales)

Onera

Bernard Lecorre

Denis Janiaud

Olivier Le Traon

Serge Muller

Marc Pernice

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.

Mechanical decoupling device for monolithic differential vibrating sensor

The invention concerns a transducer constituting the sensitive member of a sensor whose frequency varies as a function of the intensity of force applied to it. The force transducer comprises a beam having length and rectangular cross-section with thickness and width and flexionally vibrating. The beam has a thickness reduced over a central portion of its length, its width remaining constant.

Growing community of inventors

Meudon la Foret, France

Bernard Lecorre