Patent · US Active

Fiber optic gyroscope dead band error suppression

US9140551B2 · kind B2 · utility

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20Claims
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Inventors

Key dates

Filing dateJul 16, 2013
Grant dateSep 22, 2015
Priority date—
Expiry dateJul 16, 2033

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01C19/726
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

Embodiments described herein provide a method of modulating an input light beam of a fiber optic coil of an IFOG. The method includes intermittently jumping the phase step of a feedback signal to suppress dead band. Jumping the phase step includes: creating a jumped phase step during a first cycle of the IFOG, the jumped phase step having a whole value configured to cause a phase jump in the feedback signal and a fractional value corresponding to the fractional value from a phase step of a cycle immediately preceding the first cycle. Jumping the phase step also includes generating the feedback signal from a sum of the bias modulation value and the jumped phase step.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.