公开(公告)号：US5739944A

公开(公告)日：1998-04-14

申请号：US738724

申请日：1996-10-28

Applicant: Richard B. Dyott ,  Steven R. Emge

Inventor： Richard B. Dyott ,  Steven R. Emge

IPC: G01C19/72 ,  G02F1/01 ,  G02F1/11 ,  G01B11/02

CPC classification number: G01C19/722 ,  G02F1/0134

Abstract: A phase modulator is provided with supports attached to the resonating element. The supports have a length which is an odd number of quarter wavelengths of a longitudinal acoustic wave excited in the supports by the resonating element. As such, a longitudinal acoustic wave excited at the resonating element end of the support travels along the support, is reflected at the other end of the support, and returns in opposite phase to that of the excited wave, thereby causing a null in longitudinal amplitude of the wave and reducing the damping of the resonating element.

Abstract translation: 相位调制器具有附接到谐振元件的支撑。 支撑体具有由谐振元件在支撑体中激发的纵向声波的四分之一波长的奇数个长度。 因此，在支撑件的谐振元件端被激发的纵向声波沿着支撑件行进，在支撑件的另一端被反射，并且与激励波的相反相位返回，从而导致纵向振幅为零 并减少谐振元件的阻尼。

公开(公告)号：US06351310B1

公开(公告)日：2002-02-26

申请号：US09459438

申请日：2000-10-04

Applicant: Steven R. Emge ,  Sidney M. Bennett

Inventor： Steven R. Emge ,  Sidney M. Bennett

IPC: G01C1972

CPC classification number: G01C19/721

Abstract: An interferometric fiber optic gyroscope (IFOG) system includes a fiber sensing coil and a semiconductor or rare-earth doped fiber light source emitting light with an associated light source intensity. The source has a front output and back output. An optical coupler is attached to the front output for receiving said light from said light source and the coupler creates two substantially equal intensity light beams for simultaneous transmission into the sensing coil said coupler attached to the coil. The fiber sensing coil supplies return light to the coupler from said equal intensity light beams and the coupler combines and interferes the return light into a combined light beam. An optical phase modulator has a phase modulation amplitude, and the modulator coupled to the coil. An oscillator is coupled to the modulator and produces a periodic voltage which controls the phase modulation amplitude. The combined light signal is transmitted through the light source and received by the detecting means coupled to said light source at the back output. Light detection means detect and convert the combined light beam into an electrical current. An electrical amplifier is coupled to the detector for converting said current into an electrical voltage. Alternating current voltage amplitude controller means is coupled to the amplifier, and controls the associated light source intensity. Electrical signal processing means is coupled to the amplifier and processes the voltage and provides an output signal proportional to the angular rotation rate input of the sensing coil.

Abstract translation: 干涉光纤陀螺（IFOG）系统包括光纤感测线圈和发射具有相关光源强度的光的半导体或稀土掺杂光纤光源。 源有一个前置输出和反向输出。 光耦合器附接到前端输出，用于接收来自所述光源的所述光，并且耦合器产生两个基本上相等的强度光束，用于同时传输到感测线圈，所述耦合器连接到线圈。 光纤感测线圈从所述等强度的光束向耦合器提供返回光，并且耦合器将返回光组合并干扰到组合的光束中。 光相位调制器具有相位调制幅度，调制器耦合到线圈。 振荡器耦合到调制器并产生控制相位调制幅度的周期性电压。 组合的光信号通过光源传输并由在后输出处耦合到所述光源的检测装置接收。 光检测装置检测并将组合的光束转换成电流。 电放大器耦合到检测器，用于将所述电流转换成电压。 交流电压幅度控制器装置耦合到放大器，并且控制相关联的光源强度。 电信号处理装置耦合到放大器并处理电压并提供与感测线圈的角度旋转速率输入成比例的输出信号。