Sensor coil for low bias fiber optic gyroscope

Details Sensor coil for low bias fiber optic gyroscope Sensor coil for low bias fiber optic gyroscope

1992-08-31

1994-12-06

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

242159, 242 4621, 356326, G01C 1972

Patent

active

053715934

ABSTRACT:
A sensor coil for a fiber optic gyroscope. The coil is formed on a spool of carbon composite material or of another material whose coefficient of thermal expansion approximates that of the overlying windings of the glass optical fiber. The windings are potted in an adhesive material. Various bias effects are addressed by the coil design. The close matching of the thermal expansion characteristics of the spool and the fiber windings as well as proper selection of the coil potting material minimize the Shupe-like bias caused by thermal stress that would be otherwise exerted by a standard metallic spool. By careful selection of potting material (particularly its modulus of elasticity) vibration-induced bias, coil cracking, degradation of h-parameter and temperature-ramp bias sensitivity are also minimized.

REFERENCES:
patent: 4013365 (1977-03-01), Vali et al.
patent: 4743115 (1988-05-01), Arditty et al.
patent: 4781461 (1988-11-01), Baron et al.
patent: 4793708 (1988-12-01), Bednarz
patent: 4809244 (1989-02-01), Penneck et al.
patent: 4856900 (1989-08-01), Ivancevic
patent: 5162868 (1992-11-01), Ando
patent: 5168539 (1992-12-01), Negishi et al.

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