Method and apparatus for demodulating the rotation rate signal of a fiber optic gyroscope
US5133600A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1990 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Jun 1, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/726
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and device for reading out a fiber gyroscope based on the concept of determining, by gating the light signal for particular time intervals, only one particular phase section of the read-out signal of a photodetector of the fiber optic gyroscope modulated with a periodic function. Further phase sections are determined in sequence and cyclically in the same manner so that the entire photodetector signal is detected after one full cycle. Signals associated with individual phase sections are averaged separately and processed to obtain a rotation rate-proportional signal. The read-out signals can also be processed so that a control signal for deviation of the phase modulator is obtained and/or the gyroscope scale factor is stabilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.