Measurement of rotation rate using Sagnac effect
US4382681A · kind A · utility
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2References
5Claims
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Key dates
| Filing date | Dec 30, 1980 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Dec 30, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/72
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a Sagnac effect optical fibre gyroscope a commutating switch (SW) is included immediately before the Sagnac coil (C). Operation of the switch synthesises turning the coil upside down. This provides the advantages of producing an a.c. signal in response to a constant rotation rate and in certain arrangements remove a source of systematic error occasioned by drift in optical parameters of unbalanced components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.