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公开(公告)号：US4828389A
公开(公告)日：1989-05-09
申请号：US40982
申请日：1987-04-21
IPC分类号： G01C19/72
CPC分类号： G01C19/728
摘要： A triad sensor apparatus (300) comprises a passive ring Sagnac interferometric arrangement having a light source circuit (308) and a series of three multi-turn fiber optic rings (302, 304, 306). An optics/modulator circuit (312) is adapted to selectively switch optical waves emitted from the light source circuit (308) and transmit the signals through the corresponding fiber optic rings as counterpropagating optical waves. Nonreciprocal phase modulation is applied to the counter-propagating waves, and the waves are recombined so as to produce a "zero order" fringe pattern having an intensity varying in accordance with the relative phase between the counterpropagating waves. Optical waves from the light source circuit (308) are selectively applied to a ring path during a given time period, while the photodetector circuit (324) is detecting light waves which have emerged from another ring path during the same given time period. Certain of the circuit components associated with signal processing circuitry (328) are selectively timed-shared with respect to signals associated with each of the gyroscope channels.
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公开(公告)号：US6075910A
公开(公告)日：2000-06-13
申请号：US685355
申请日：1996-07-24
CPC分类号： H04Q11/0005 , H04Q2011/0039 , H04Q2011/0049 , H04Q2011/0052 , H04Q2011/0083
摘要： A control arrangement for minimizing optical leakage in a time-division, multi-stage electro-optical switch by the periodic adjustment of switching voltage levels. An optical detector connected to an idle port of the switch transmits a leakage signal which represents optical leakage in the switch in various configurations of the switch. The leakage signal is filtered by a low pass filter and sampled at a low rate. A processor stores the sampled data and periodically analyzes the data to determine the appropriate changes in the switching voltage levels for each of the stages of the switch to minimize optical leakage. An output circuit connected to the processor and the switch modifies a previously determined base voltage signals for each of the stages to incorporate the voltage level changes and applies the modified signals to the switch in the appropriate time slots.
摘要翻译： 用于通过周期性调节开关电压电平来最小化时分多级电光开关中的光泄漏的控制装置。 连接到开关的空闲端口的光学检测器在开关的各种配置中发送表示开关中的光泄漏的泄漏信号。 泄漏信号由低通滤波器滤波并以低速采样。 处理器存储采样数据并周期性地分析数据以确定开关中每个级的开关电压电平的适当变化以使光泄漏最小化。 连接到处理器和开关的输出电路修改用于每个级的预先确定的基本电压信号以合并电压电平变化，并将修改的信号在适当的时隙中施加到开关。
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公开(公告)号：US5926275A
公开(公告)日：1999-07-20
申请号：US879901
申请日：1997-06-19
申请人： Glen A. Sanders , Rudolf C. Dankwort , Andrew W. Kaliszek , Clarence E. Laskoskie , Lee K. Strandjord , Daniel L. Sugarbaker , Jerry L. Page
发明人： Glen A. Sanders , Rudolf C. Dankwort , Andrew W. Kaliszek , Clarence E. Laskoskie , Lee K. Strandjord , Daniel L. Sugarbaker , Jerry L. Page
IPC分类号： G01C19/72
CPC分类号： G01C19/721 , G01C19/728
摘要： A rectification error reducer for a fiber optic gyroscope, which is an intensity servo or compensator for reducing vibration effects in the optical signals caused by modulation at vibration frequencies induced by the gyroscope operating environment. The vibration effects may be detected in signals from the photodiode output in amplitude form which is used in a control system to null out optical intensity variations at the frequencies of vibration.
摘要翻译： 一种用于光纤陀螺仪的整流误差减小器，其是用于减少由由陀螺仪操作环境引起的振动频率下的调制引起的光信号中的振动效应的强度伺服或补偿器。 可以在振幅形式的光电二极管输出的信号中检测振动效应，该控制系统用于消除振动频率处的光强度变化。
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公开(公告)号：US5923424A
公开(公告)日：1999-07-13
申请号：US879902
申请日：1997-06-19
申请人： Glen A. Sanders , Rudolf C. Dankwort , Andrew W. Kaliszek , Clarence E. Laskoskie , Lee K. Strandjord , Daniel L. Sugarbaker , Jerry L. Page
发明人： Glen A. Sanders , Rudolf C. Dankwort , Andrew W. Kaliszek , Clarence E. Laskoskie , Lee K. Strandjord , Daniel L. Sugarbaker , Jerry L. Page
IPC分类号： G01C19/72
CPC分类号： G01C19/728 , G01C19/721
摘要： A rectification error reducer for a fiber optic gyroscope, which is an intensity servo or compensator for reducing vibration effects in the optical signals caused by modulation at vibration frequencies induced by the gyroscope operating environment. The vibration effects may be detected in signals from the photodiode output in amplitude form which is used in a control system to null out optical intensity variations at the frequencies of vibration.
摘要翻译： 一种用于光纤陀螺仪的整流误差减小器，其是用于减少由由陀螺仪操作环境引起的振动频率下的调制引起的光信号中的振动效应的强度伺服或补偿器。 可以在振幅形式的光电二极管输出的信号中检测振动效应，该控制系统用于消除振动频率处的光强度变化。
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公开(公告)号：US4507737A
公开(公告)日：1985-03-26
申请号：US313207
申请日：1981-10-20
CPC分类号： G01C21/16
摘要： A heading reference system (100) for sensing vehicle heading relative to fixed inertial space is mountable in a vehicle such as a land-based vehicle and includes a two-degree-of-freedom (TDF) dynamically tuned gyroscope (150) responsive to vehicle rotation about pitch and yaw axes for generating rate signals indicative of the rotation. A caging loop (160) generates force signals for torquing the gyroscope (150) to a null position. A pair of accelerometers (186, 187) are responsive to misalignment of the vehicle relative to a horizontal plane formed by the pitch and roll axes. Processor circuitry (180) is responsive to the force signals, the misalignment of the vehicle relative to pitch and roll axes, and distance signals generated by an odometer unit (140) to apply heading signals to an indicator unit (120) for visually indicating to a vehicle operator the directional heading.
摘要翻译： 用于感测相对于固定惯性空间的车辆航向的航向参考系统（100）可安装在诸如陆基车辆的车辆中，并且包括响应车辆的两自由度（TDF）动态调谐陀螺仪（150） 围绕俯仰和偏航轴的旋转，用于产生指示旋转的速率信号。 笼式回路（160）产生用于将陀螺仪（150）扭转到零位置的力信号。 一对加速度计（186,187）响应车辆相对于由俯仰和滚动轴线形成的水平平面的不对准。 处理器电路（180）响应于力信号，车辆相对于俯仰和滚动轴线的不对准以及由里程表单元（140）产生的距离信号，以将航向信号施加到指示器单元（120），用于可视地指示 车辆操作员定向航向。
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公开(公告)号：US5262843A
公开(公告)日：1993-11-16
申请号：US875589
申请日：1992-04-28
CPC分类号： G01C19/72
摘要： An optical rate sensor (300) is disclosed for use in inertial reference systems to measure rates of angular rotation with substantially high resolution and sensitivity. The sensor (300) comprises a passive ring Sagnac interferometer (302) with a multiturn fiber optic ring (308) through which counter-propogating optical waves are transmitted. A non-reciprocal phase modulation is applied to the waves, and the waves are combined to produce a "zero order" fringe pattern having an intensity varying in accordance with the relative phase between the counter-propogating waves. The phase modulation is under control of modulated control signals which are functionally related to measured values of the angular rotation rate. The phase modulation thereby produces an intensity signal which tends to alternate between values of substantially maximum change with respect to given changes in phase shift resulting from the non-reciprocal phase modulation. The optical rate sensor (300) also includes an analog integrator (364) and a central processing unit (384) which provides for optimal control and filtering for determination of the rate of angular rotation and appropriate control signals to be applied to the non-reciprocal phase modulator. The central processing unit (384) also includes an arrangement whereby a relatively wide dynamic range is achieved with substantially minimal errors in rate determination and with the use of a physically realizable digital-to-analog converter through an arrangement whereby the most significant bits of the determined control signals are "stripped off" prior to application through a digital-to-analog converter (392).
摘要翻译： 公开了用于惯性参考系统中的光学速率传感器（300），以基本上高分辨率和灵敏度测量角度旋转速率。 传感器（300）包括具有多圈光纤环（308）的被动环形Sagnac干涉仪（302），透射反向传播光波。 将不可逆相位调制施加到波，并且波被组合以产生具有根据反向传播波之间的相对相位而变化的强度的“零级”条纹图案。 相位调制受调制控制信号的控制，调制控制信号在功能上与角旋转速率的测量值有关。 相位调制从而产生强度信号，该强度信号倾向于相对于由非互易相位调制产生的相移的给定变化而在基本上最大变化的值之间交替。 光学速率传感器（300）还包括模拟积分器（364）和中央处理单元（384），其提供用于确定角旋转速率和适用于不可逆的适当控制信号的最佳控制和滤波 相位调制器。 中央处理单元（384）还包括这样一种布置，由此在速率确定中以基本上最小的误差实现相对宽的动态范围，并且通过这样一种布置使用物理上可实现的数模转换器， 在通过数模转换器（392）应用之前，确定的控制信号被“剥离”。
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