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1. (WO1999006842) MULTISENSOR WITH DIRECTLY COUPLED ROTORS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1999/006842 International Application No.: PCT/US1998/014279
Publication Date: 11.02.1999 International Filing Date: 08.07.1998
IPC:
G01C 19/56 (2012.01)
G PHYSICS
01
MEASURING; TESTING
C
MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
19
Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
56
Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
Applicants:
LITTON SYSTEMS, INC. [US/US]; 21240 Burbank Boulevard Woodland Hills, CA 91367-6675, US
Inventors:
STEWART, Robert, E.; US
Agent:
KRAMSKY, Elliott, N.; Suite 400 5850 Canoga Avenue Woodland Hills, CA 91367, US
Priority Data:
08/904,92701.08.1997US
Title (EN) MULTISENSOR WITH DIRECTLY COUPLED ROTORS
(FR) MULTIDETECTEUR DE COUPLAGE DIRECT DE ROTORS
Abstract:
(EN) A multisensor includes direct rotor coupling. A pair of rotors (16, 18) is mechanically coupled by a torsion bar (20) 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 (64, 66) are fixed to opposed surfaces of radial vanes (52-62) of the rotors which suspend the torsionally-coupled rotor pair with the case (10), 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.
(FR) L'invention porte sur un multidétecteur de couplage direct de rotors. Les deux rotors (16, 18) d'une paire sont couplés mécaniquement par une barre (20) de torsion dont la rigidité détermine largement la fréquence de résonance de la paire de rotors contraoscillants. L'axe de la barre de torsion coïncide avec l'axe de rotation commun aux rotors. Des piézobimorphes (64, 66) fixés surfaces opposées des ailettes (52, 62) radiales des rotors suspendent au carter la paire de rotors couplés en torsion au carter (10) et l'isolent des vibrations angulaires extérieures pouvant interférer avec la fréquence de résonance du sous-ensemble constitué par la paire de rotors. Les bimorphes reçoivent des signaux commandant les oscillations des rotors. La rigidité des ailettes et de la barre de torsion déterminent principalement la fréquence commune de résonance de la paire de rotors contraoscillants.
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Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)