Patent ID: 8739641

Claim:
Resonating force sensor comprising a proof body formed of a one-piece plate including a first area defining a first recess, intended, in operation, to be held in position with respect to a mounting, characterised in that the plate comprises a second area defining both the first recess and a second recess, the second area being connected to the first area, a measuring beam extending across the first recess having a first end embedded in the first area and a second end mechanically connected to the second area, an excitation beam extending across the second recess having its two embedded ends in the second area being provided with at least one excitation element a third area connected to the first area and an effector beam having a free end on which the force to be measured is going to be applied and an end embedded in the third area, a fourth area connecting the embedded end of the effector beam to the second end of the measuring beam so that when the proof body vibrates through activation of the excitation element, in the absence of force applied to the free end of the effector beam, the measuring beam has at least one vibration antinode and is equipped with at least one measuring element at the level of said antinode, and the free end of the effector beam is situated substantially on a vibration node of the effector beam, and without activation of the excitation element, in the presence of a force applied to the free end of the effector beam, the measuring element is situated at a point of maximal deformation of the measuring beam.