Multiplexed fiberoptic gyro control
US5033854A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1989 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Dec 6, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/721
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and methods are disclosed for the time division multiplexing of fiberoptic gyros to reduce the amount of control electronics required. Each of a plurality of gyros is sampled at a rate of n.tau., where .tau. is the gyro optical transit time and n is an integer. The sampled signal is fed to a digital signal processor (DSP) for processing and used to form a rate feedback signal. The rate feedback signal is converted to analog form to drive the phase modulator drive of each gyro. In preferred embodiments the multiplexed sample rate is at least ten times the bandwidth of the gyros. The rate data can be filtered and output by the DSP and the DSP can integrate the rate data to give angle data. The use of precision analog circuits is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.