Analog fiber gyro with extended linear range
US4573797A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1984 |
| Grant date | Mar 4, 1986 |
| Priority date | — |
| Expiry date | Feb 24, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/721
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gyroscope system for obtaining an extended linear dynamic range for platform rotation rate measurements comprising a first fiber optic gyroscope with a first optical fiber coil described by a first quantity L.sub.1 R.sub.1 /.lambda..sub.1 where L.sub.1 is the length of the first optical fiber coil, R.sub.1 is the radius of the first fiber coil, and .lambda..sub.1 is the light source wavelength, this first quantity being chosen to provide a linear output for a first range of small rotation rates of the platform; a second fiber optic gyroscope with a second optical fiber coil described by a second quantity L.sub.2 R.sub.2 /.lambda..sub.2 with this second quantity being chosen to provide a linear output for a second range of large rotation rates of the platform, with this second range partially overlapping the first range; voltage controlled oscillators for converting the gyroscope signals to pulse frequency signals; a circuit for determining whether a reference rotation rate within the overlap between the first and second ranges has been reached and generating a control signal in accordance therewith; a pulse counter; and a switch for switching one or the other of the pulse frequen…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.