Signal evaluation method for a fiber-optic rotation sensor
US4756620A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1985 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Jul 26, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/72
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fiber-optic rotation sensor (fiber gyro) includes an optical transmission system into which a light signal is fed by means of a laser diode. The modulation is effected by means of a piezomodulator. The coupled-out signal is fed to a receiver diode and the amplified output signal of the latter is fed to a phase sensitive rectifier and to a peak-to-peak value measuring device. The measured peak-to-peak value represents the proportionality factor K through which the output signal of rectifier is divided. Therefore it is possible with this method to constantly measure the proportionality factor K, which changes under various influences and to thus eliminate errors in the determination of the Sagnac phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.