Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1987-09-30
1988-10-11
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01B 902, G01C 1964
Patent
active
047767006
ABSTRACT:
An improved fiber optic gyroscope with a substantial improvement in dynamic range and scale factor stability over a basic fiber optic gyroscope is disclosed. In a preferred embodiment of the invention the detected output of the gyroscope is demodulated to yield first and second voltage levels respectively proportional to preselected sine and cosine components of the detected output. These first and second voltage levels are respectively switched between a feedback network which stabilizes the drive level and a rate sensing circuit which senses the rotation rate. Such switching occurs when operational states are switched in order to stabilize the drive level from the feedback network and to provide the most sensitive one of the first and second voltage levels to the rate sensing network.
REFERENCES:
Publication, A Constant Accuracy, High Dynamic Range Fiber Optic Gyroscope, y N. J. Frigo, SPIE, vol. 719, Fiber Optic Gyros, (10th Anniversary Conference held in Cambridge, Mass.), Sep. 24-26, 1986, pp. 155-159.
Publication, An Amplitude Switched Fiber Optic Gyroscope, by N. J. Frigo, OF S '86, Tokyo, (Proceedings of Fourth International Conference on Optic Fiber Sensors-Conference held in Tokyo, Japan), Oct. 7-9, 1986, four pages.
Publication, Signal Processing Schemes for the Fiber-Optic Gyroscope, by K. Bohm et al., SPIE, vol. 719, Fiber Optic Gyros, (10th Anniversary Conference held in Cambridge, Mass.), Sep. 24-26, 1986, pp. 36-44.
Publication, Fibre Optic Gyro with Digital Data Acquisition and Control System, by K. Bohm et al., Symposium Gyro Technology, Stuttgart, Germany (DGON), (1983), preprint of subsequently printed article, pp. 4.0-4.11.
Publication, Comparative Sensitivity and Noise Investigations On Fiber Gyros Of Various Optical Configurations, by K. U. Baron et al., Symposium Gyro Technology, Stuttgart, Germany (DGON), (1983), preprint of subsequently printed article--pp. 3.0-3.15.
Publication, Direct Rotation-Rate Detection with a Fibre-Optic Gyro by Using Digital Data Processing, by K. Bohm et al., 19 Electronics Letters 997-999, (1983).
Jameson George
McDonnell Thomas E.
McGraw Vincent P.
The United States of America as represented by the Secretary of
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