公开(公告)号：CA2117416A1

公开(公告)日：1996-01-26

申请号：CA2117416

申请日：1994-07-25

Applicant: LITTON SYSTEMS INC

Inventor： CORDOVA AMADO ,  BILINSKI DONALD J ,  FERSHT SAMUEL N ,  SURABIAN GLENN M ,  WILDE JOHN D ,  HINMAN PAUL A

IPC: G01C19/72

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 minimizes 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.