Optics: measuring and testing – By light interference – Rotation rate
Reexamination Certificate
2007-01-23
2007-01-23
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
By light interference
Rotation rate
Reexamination Certificate
active
10784811
ABSTRACT:
A phase jump amplitude and timing controller is used in a fiber optic gyroscope for suppressing color noise. The phase jump amplitude and timing controller inserts a phase/voltage jump into the feedback signal of the loop closure electronics of the fiber optic gyroscope. This phase/voltage jump breaks the repeated pattern of the drive signal. The IOC time-dependent characteristics are totally eliminated by the randomized feedback signal because no repeated signal is applied to the IOC. The randomized amplitude is preferably within the full ±π phase such that the optical errors average to zero. A fixed frequency higher than the interested spectral region can shift the color noise to higher frequency. A randomized frequency can spread the color noise over full spectrum, and totally eliminate the RDS. In other words, the color noise caused by the nonlinearity of the driving circuit and IOC spreads out over a wide range of spectrum such that no distinct frequency peaks are apparent in the spectral domain.
REFERENCES:
patent: 5914781 (1999-06-01), Jaklitsch et al.
patent: 5999304 (1999-12-01), Sanders et al.
patent: 6473182 (2002-10-01), Tazartes et al.
patent: 6744519 (2004-06-01), Lange et al.
patent: 6765678 (2004-07-01), Strandjord et al.
patent: 2003/0202187 (2003-10-01), Lange et al.
International Search Report: PCT/US2004/037125, International Search Authority—European Patent Office, Apr. 1, 2005, 6 pages.
Chen Chung-Jen
Lange Charles H.
Honeywell International , Inc.
Ingrassia Fisher & Lorenz
Lyons Michael A.
Toatley , Jr. Gregory J.
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