Linear phase ramp fiber optic gyro

Details Linear phase ramp fiber optic gyro Linear phase ramp fiber optic gyro

1990-04-18

1991-11-05

Turner, Samuel

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1972

Patent

active

050627104

ABSTRACT:
In a closed loop type fiber optic gyro the number of waves of a ramp voltage for providing a phase difference between right-handed light and left-handed light which pass through an optical fiber coil is counted, the ramp voltage is converted into a digital value, and the digital value is used as a fraction of the calculated number of waves of the ramp voltage, thereby improving the accuracy of the azimuth angle being measured.

REFERENCES:
patent: 4981358 (1991-01-01), McBrien et al.
"Double Closed-Loop Hybrid Fiber Gyroscope Using Digital Phase Ramp", Lefevre et al., 1984.
"Fiber Gyroscopes", Lefevre et al., Thomson Laboratories, 1986.
"Fibre Optic Gyroscope", Electronics & Wireless World, vol. 95, No. 1636, Feb. 1989, pp. 190-191.

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