Measuring and testing – Instrument proving or calibrating – Angle – direction – or inclination
Reexamination Certificate
2007-05-22
2007-05-22
Noland, Thomas P. (Department: 2856)
Measuring and testing
Instrument proving or calibrating
Angle, direction, or inclination
C702S116000
Reexamination Certificate
active
10523398
ABSTRACT:
Apparatus for measuring variation in scalefactor from a predetermined value for a vibrating structure gyroscope has a vibrating structure (R), fixed primary and fixed secondary drives (1, 13) for putting and maintaining the vibrating structure (R) in vibrating resonance, fixed primary and fixed secondary pick offs (2, 6) for detecting vibration of the vibrating structure (R), with the drives and pick offs (1, 13, 2, 6) being located radially around the vibrating structure (R), quadrature component and real component loop systems (7, 8), automatic gain control and phase locked loop systems (5, 22), a sin/cos pick off resolver (38) for receiving signals from the primary and secondary pick offs (2, 6) and for outputting signals to the quadrature component and real component loop systems (7, 8) and to the automatic gain control and phase locked loop systems (5, 22), a sin/cos drive resolver (37) for receiving output signals from the quadrature component and real component loop systems (7, 8) and from the automatic gain control and phase locked loop systems (5, 22) and for feeding control signals to the primary and secondary drives (1, 13), and an angular displacement control (40) for feeding angular displacement control signals to the sin/cos drive and pick off resolvers (38, 37) to control uniform displacement of the resolved carrier and response mode drives and pick offs axes angularly around the vibrating structure (R), with respect to a central axis of the vibrating structure, at a known rate.
REFERENCES:
patent: 4075701 (1978-02-01), Hofmann
patent: 4703815 (1987-11-01), Hirano et al.
patent: 4797841 (1989-01-01), Hatch
patent: 5270959 (1993-12-01), Matsuzaki et al.
patent: 5621171 (1997-04-01), Fell
patent: 5795988 (1998-08-01), Lo et al.
patent: 5866796 (1999-02-01), Chia et al.
patent: 5889193 (1999-03-01), Pfaff et al.
patent: 6591209 (2003-07-01), Romano et al.
patent: 6725169 (2004-04-01), Thielman et al.
patent: 2006/0260382 (2006-11-01), Fell et al.
patent: 0 492 739 (1992-07-01), None
patent: 2 251 072 (1992-06-01), None
patent: 2322196 (1998-08-01), None
patent: 2329471 (1999-03-01), None
patent: 2001-21362 (2001-01-01), None
patent: WO 01/53776 (2001-07-01), None
patent: WO 01/77620 (2001-10-01), None
Fell Christopher P
Kazar Andrew
Townsend Kevin
BAE Systems plc
Nixon & Vanderhye P.C.
Noland Thomas P.
LandOfFree
Method and apparatus for measuring scalefactor variation in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring scalefactor variation in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring scalefactor variation in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3808381