Double resonating beam force transducer with reduced...

Details Double resonating beam force transducer with reduced... Double resonating beam force transducer with reduced...

G - Physics

01

L

73/70, 333/91

G01L 1/10 (2006.01) G01L 1/16 (2006.01) G01P 15/097 (2006.01) G01P 15/10 (2006.01)

Patent

CA 1209369

DOUBLE RESONATING BEAM FORCE TRANSDUCER WITH REDUCED LONGITUDINAL PUMPING Abstract A double resonator beam force transducer configured to minimize longitudinal pumping by making the beams vibrate sym- metrically. This can be accomplished by making the boundary conditions of the beams symmetrical or, if the boundary condi- tions are nonsymetric, then by biasing the beams inwardly or outwardly to compensate for the nonsymmetrical boundary condi- tions of the beams. In the nonsymmetrical case where the beams would bow outwardly at their fundamental resonant frequency or an odd overtone thereof, an inward bias is provided to minimize longitudinal pumping. In the nonsymmetrical case where the beams would bow inwardly at an even overtone of the fundamental resonant frequency, an outward bias is provided to minimize longitudinal pumping. The inward or outward bias is provided in various embodiments by bowing the beams inwardly or outwardly, placing masses on the inner or outer edges of the beams, or tapering the inner or outer edges of the beams so that the width of the beams increase toward their midpoints.

440117

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