Multisensor with directly coupled rotors

Details Multisensor with directly coupled rotors Multisensor with directly coupled rotors

1999-08-02

2000-10-31

Kwok, Helen C.

Measuring and testing

Speed, velocity, or acceleration

Response to multiple sensing means or motion conditions

7350404, 7350412, G01P 904

Patent

active

061385115

ABSTRACT:
A multisensor includes direct rotor coupling. A pair of rotors is mechanically coupled by a torsion bar whose stiffness largely determines the resonant frequency of the counteroscillating rotor pair. The axis of the torsion bar is coincident with the common axis of rotation of the rotors. Piezo bimorphs are fixed to opposed surfaces of radial vanes of the rotors which suspend the torsionally-coupled rotor pair with the case, isolating it from external angular vibration that could interfere with the resonant frequency of the rotor pair subassembly. The bimorphs receive signals for driving the oscillations of the rotors. Taken together, the stiffnesses of the vanes and the torsion bar substantially determine the common resonant frequency of the counteroscillating pair of rotors.

REFERENCES:
patent: 4795258 (1989-01-01), Martin
patent: 4821572 (1989-04-01), Hulsing, II
patent: 4841773 (1989-06-01), Stewart et al.
patent: 4996877 (1991-03-01), Stewart
patent: 5007289 (1991-04-01), Stewart et al.
patent: 5065627 (1991-11-01), Stewart et al.
patent: 5142485 (1992-08-01), Rosenberg et al.
patent: 5428995 (1995-07-01), Fersht et al.
patent: 5932803 (1999-08-01), Wyse
patent: 5932805 (1999-08-01), Stewart

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