Fiber optical gyroscope utilizing orthogonal sequences
US5189488A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Nov 25, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/728
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Single and multiple axis fiber optic gyroscope systems employ orthogonal sequences to minimize the effects of both intra and inter-axis crosstalk. Sequences for driving electro-optic modulators are derived by examination of underlying primary and secondary demodulation sequences. Such underlying sequences are examined for orthogonality in accordance with a number of selection rules. When the selection rules are satisfied, the corresponding modulation sequences for driving the gyro(s) are identified and applied. By selecting the modulation waveforms in accordance with orthogonality criteria, one is assured of mean-zero bias errors within a predetermined number of loop transit times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.