Patent US937436A successfully refreshed from Google Patents.
Patent US5094537A successfully refreshed from Google Patents.
US5094537A
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Signal processing system for correcting ring laser gyroscope readout
Assignee: Honeywell Inc
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Filing: 1991-03-08
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Granted: 1992-03-10
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Expires: 2011-03-08
Abstract
Abstract An RLG signal processing system in which RLG quadrature errors are corrected by adding to one signal a portion of the other signal whose magnitude is a function of the magnitude of the quadrature error. Output buffer amplifiers restore the output signal to equal amplitude.
Inventors
- 👤 Andrew J. Karpinski, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:40
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; G01C19/661
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A ring laser gyroscope system comprising in combination: a pair of laser beams propagating in opposite directions about a closed-loop path producing an interference pattern of alternating relatively bright and dark regions; means for generating a pair of sinusoidal output signals nominally in a quadrature relation in response to movement of said pattern; means for correcting a quadrature error in the phase relation between said pair of sinusoidal output signals, and said correcting means including means to add to one signal of said pair a portion of the other signal of said pair where the magnitude of said portion is a function of said deviation.
Claim 2
Dependent Claim
105 words
A ring laser gyroscope system comprising in combination: a pair of laser beams propagating in opposite directions about a closed-loop path producing an interference pattern of alternating relatively bright and dark regions; means for generating a pair of sinusoidal output signals nominally in a quadrature relation in response to movement of said pattern; means for correcting a quadrature error in the phase relation between said pair of sinusoidal output signals, and said correcting means including means to add to one signal of said pair a portion of the other signal of said pair where the magnitude of said portion is a function of said deviation.
Claim 3
Dependent Claim
18 words
A ring laser gyroscope system as in claim 1 wherein said function is the Sin of said deviation.
Claim 4
Dependent Claim
18 words
A ring laser gyroscope system as in claim 2 wherein said means for correcting includes an operational aplifier.
Claim 5
Dependent Claim
19 words
A ring laser gyroscope system as in claim 1 further including means for equalizing the amplitudes of said signals.
Claim 6
Dependent Claim
19 words
A ring laser gyroscope system as in claim 2 further including means for equalizing the amplitudes of said signals.
Claim 7
Dependent Claim
35 words
A ring laser gyroscope as in claim 4 wherein said equalizing means includes a pair of buffer amplitudes whose respective gains A1 and A2 are related so that: A1=A2/COS ΔΘ, where ΔΘ equals said deviation.
References Cited (Backward Citations)
US4791460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |