公开(公告)号：US20150009505A1

公开(公告)日：2015-01-08

申请号：US14379665

申请日：2013-02-20

Applicant: IXBLUE

Inventor： Hervé Lefevre ,  Van-Dong Pham ,  Joachim Honthaas

IPC: G01C19/66

CPC classification number: G01C19/665 ,  G01C19/662 ,  G01C19/721 ,  G01C19/726 ,  G01R33/0322

Abstract: A fiber-optic measurement device (10) includes a SAGNAC ring interferometer (20) having a proper frequency fp. The aim is to improve response time while maintaining high precision across the measurement range. Biasing elements (130) are used to produce: a first biasing phase-differential modulation component Δφb1(t) (34) which is periodic in time-slots, having levels +π and −π, at a first biasing modulation frequency fb1 such that fb1=(2k1+1) fp, k1 being a natural number; and a second periodic biasing phase-differential modulation component Δφb2(t) (35), having extreme amplitudes +π/a and −π/a, a being a non-zero real number such that |a|>1, at a second biasing modulation frequency fb2 such that fb2=(2k2+1) fp, k2 being a non-zero natural number such that k2>k1. A gyrometer including such a measurement device and a navigation or inertial-stabilization system including at least one such gyrometer are also described.

Abstract translation: 光纤测量装置（10）包括具有适当频率fp的SAGNAC环形干涉仪（20）。 目的是提高响应时间，同时在整个测量范围内保持高精度。 偏置元件（130）用于产生：在时隙中周期性的第一偏置相位差分调制分量＆Dgr; b1（t）（34），具有电平+ pgr; 和 - ＆pgr，以第一偏置调制频率fb1使得fb1 =（2k1 + 1）fp，k1是自然数; 和具有极值幅度+＆pgr; / a和 - ＆pgr / / a的第二周期性偏置相位差调制分量＆Dgr; b2（t）（35），a是非零实数，使得| a | > 1，在第二偏置调制频率fb2使得fb2 =（2k2 + 1）fp，k2是非零自然数，使得k2> k1。 还描述了包括这种测量装置和包括至少一个这种陀螺仪的导航或惯性稳定系统的陀螺仪。