公开(公告)号：US5444534A

公开(公告)日：1995-08-22

申请号：US174184

申请日：1993-12-27

申请人： Richard B. Dyott ,  Eric L. Brooker ,  Sidney M. Bennett ,  John D. Myhre

发明人： Richard B. Dyott ,  Eric L. Brooker ,  Sidney M. Bennett ,  John D. Myhre

IPC分类号： G01C19/72 ,  G02B6/44 ,  G01C19/64

CPC分类号： G02B6/4457 ,  G01C19/722

摘要： The sensing coil of a fiber optic gyroscope is mounted by submerging the coil in a gel which surrounds and supports the coil. The components attached to the coil, such as the directional coupler(s) and polarizer, may also be submerged in the gel. The gel is contained by a rigid housing, in which the walls of the housing are spaced away from the coil. The intervening space between the coil and the innermost walls of the housing are filled with the gel, and the gel may be bonded to those innermost walls. The gel remains stiff enough to maintain the coil in a fixed position relative to the housing, and soft enough to avoid any significant effect on the h of the coil over the operating temperature range. In a modified form, the optical-fiber sensing coil is wound around a bobbin that has a layer of gel on the coil-supporting surface. A coating of adhesive is applied to the outside surfaces of the coil to hold the coil windings together in a stable configuration around the layer of gel.

摘要翻译： 光纤陀螺仪的感测线圈通过将线圈浸没在围绕并支撑线圈的凝胶中来安装。 附接到线圈的部件，例如定向耦合器和偏振器，也可以浸没在凝胶中。 凝胶由刚性壳体容纳，其中壳体的壁与线圈间隔开。 线圈和壳体最内壁之间的间隔填充有凝胶，并且凝胶可以结合到那些最内壁。 凝胶保持足够的刚度以将线圈保持在相对于壳体的固定位置，并且足够柔软以避免在工作温度范围内对线圈的h的任何显着影响。 在修改形式中，光纤感测线圈缠绕在线圈支撑表面上具有凝胶层的线轴上。 将粘合剂涂层施加到线圈的外表面，以将线圈绕组以凝胶层周围的稳定构型保持在一起。

公开(公告)号：US4831346A

公开(公告)日：1989-05-16

申请号：US31098

申请日：1987-03-26

申请人： Eric L. Brooker ,  Sidney M. Bennett

发明人： Eric L. Brooker ,  Sidney M. Bennett

IPC分类号： H01B11/18 ,  H01R9/05

CPC分类号： H01B11/1873 ,  H01B11/1878 ,  H01R9/05

摘要： A flexible coaxial cable assembly that can be efficiently packaged and shipped in segments and installed and assembled in the field. The cable includes strain insulators spaced along the length of the region between the inner and outer conductors to transmit stresses such as differential thermal expansion and contraction between the conductors. The inner conductors of successive cable segments may be rigidly joined to each other to prevent relative movement between the inner conductors of adjacent cable segments. The inner and outer conductors can be corrugated.

公开(公告)号：US5481358A

公开(公告)日：1996-01-02

申请号：US230763

申请日：1994-04-21

申请人： Richard B. Dyott ,  Eric L. Brooker ,  Sidney M. Bennett ,  John D. Myhre

发明人： Richard B. Dyott ,  Eric L. Brooker ,  Sidney M. Bennett ,  John D. Myhre

IPC分类号： G02B6/00 ,  G01C19/72 ,  G02B6/44 ,  G01C19/64

CPC分类号： G01C19/722 ,  G02B6/4457

摘要： The sensing coil of a fiber optic gyroscope is wholly or partially surrounded by a gel. The components attached to the coil, such as the directional coupler(s) and polarizer, may also be wholly or partially submerged in the gel. The gel is contained by a rigid housing, in which the inner walls of the housing form a cavity for the coil and the gel. The cavity is filled with the gel, and the gel may be bonded to the inner walls of the housing. The gel remains stiff enough to maintain the coil in a fixed position relative to the housing, and soft enough to avoid any significant effect on the h of the coil over the operating temperature range. Furthermore, the gel can be loaded with particles to adjust the specific gravity of the gel, to modify the thermal properties of the gel and to increase the viscosity of the gel for improved vibration damping. In a modified form, the optical-fiber sensing coil is positioned on a mounting surface and otherwise surrounded by the gel. Alternatively, the optical fiber sensing coil is wound around a form that has a layer of gel on the coil-supporting surface.

摘要翻译： 光纤陀螺仪的传感线圈全部或部分被凝胶包围。 附接到线圈的部件，例如定向耦合器和偏振器，也可以完全或部分地浸没在凝胶中。 凝胶由刚性壳体容纳，其中壳体的内壁形成用于线圈和凝胶的空腔。 空腔填充有凝胶，凝胶可以结合到壳体的内壁。 凝胶保持足够的刚度以将线圈保持在相对于壳体的固定位置，并且足够柔软以避免在工作温度范围内对线圈的h的任何显着影响。 此外，凝胶可以装载颗粒以调节凝胶的比重，以改变凝胶的热性质并增加凝胶的粘度以改善减振。 在修改形式中，光纤感测线圈定位在安装表面上，否则被凝胶包围。 或者，光纤感测线圈缠绕在线圈支撑表面上具有凝胶层的形式。

公开(公告)号：US06836334B2

公开(公告)日：2004-12-28

申请号：US09998944

申请日：2001-10-31

申请人： Sidney M. Bennett

发明人： Sidney M. Bennett

IPC分类号： G01C1972

CPC分类号： G01C19/72

摘要： The invention comprises a system and method for reducing a shot noise component of the Angle Random Walk Noise in a fiber optic sensor by providing a first optical amplifier prior to the photodetector of the sensor to increase the power seen at the detector. An optical amplifier and second detector may be provided to detect a source sample, which can be useful in reducing RIN noise. Optical isolators may be added at the optical amplifiers to prevent rear facet emissions from the optical amplifiers from affecting sensor signals. A coupler with an isolator, amplifier and detector may be provided to receive a sample of the facet emissions from the first optical amplifier, which may be subtracted from the sensor signal at the detector so as to eliminate the facet emissions from the sensor signals. Polarizers may be provided prior to each detector to further eliminate emissions.

摘要翻译： 本发明包括一种用于通过在传感器的光电检测器之前提供第一光学放大器以增加在检测器处看到的功率来减小光纤传感器中角度随机游走噪声的散粒噪声分量的系统和方法。 可以提供光放大器和第二检测器来检测源样本，这可以用于减少RIN噪声。 可以在光放大器处添加光隔离器，以防止光放大器的后面发射影响传感器信号。 可以提供具有隔离器，放大器和检测器的耦合器以接收来自第一光放大器的小面发射的样本，其可以在检测器处从传感器信号中减去，以消除来自传感器信号的小平面发射。 可以在每个检测器之前提供偏振器以进一步消除排放。

公开(公告)号：US06351310B1

公开(公告)日：2002-02-26

申请号：US09459438

申请日：2000-10-04

申请人： Steven R. Emge ,  Sidney M. Bennett

发明人： Steven R. Emge ,  Sidney M. Bennett

IPC分类号： G01C1972

CPC分类号： G01C19/721

摘要： 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.

摘要翻译： 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。

公开(公告)号：US06429939B1

公开(公告)日：2002-08-06

申请号：US09615181

申请日：2000-07-13

申请人： Sidney M. Bennett ,  Richard B. Dyott

发明人： Sidney M. Bennett ,  Richard B. Dyott

IPC分类号： G01C1972

CPC分类号： G01C19/72

摘要： A fiber optic sensor with a digital signal processing system and a method of using a digital signal processing system with a fiber optic sensor is disclosed. The system digitally samples the output signal of the fiber optic sensor at a frequency which is an integer multiple of the modulator drive frequency and multiplies the sampled output signal with predetermined sine and cosine coefficients corresponding to the (fundamental) modulator drive frequency and at most the second, third and fourth harmonic thereof. This simple system can maintain a constant modulation depth and modulator phase shift and provide sensor output data over a wide operating range of the fiber optic sensor. The fiber optic sensor can be employed, for example, for rotation rate and magnetic field measurements.

摘要翻译： 公开了具有数字信号处理系统的光纤传感器和使用具有光纤传感器的数字信号处理系统的方法。 该系统以调制器驱动频率的整数倍的频率对光纤传感器的输出信号进行数字采样，并将采样的输出信号与对应于（基本）调制器驱动频率的预定的正弦和余弦系数相乘，最多 第二，第三和第四谐波。 这种简单的系统可以保持恒定的调制深度和调制器相移，并在光纤传感器的宽工作范围内提供传感器输出数据。 光纤传感器可用于例如旋转速率和磁场测量。

公开(公告)号：US3991418A

公开(公告)日：1976-11-09

申请号：US14810

申请日：1970-02-10

申请人： Sidney M. Bennett

发明人： Sidney M. Bennett

IPC分类号： G01S3/28 ,  G01S3/46 ,  G01S3/02

CPC分类号： G01S3/28 ,  G01S3/46

摘要： Skywave propagation of quasi-sinusoidal signal sources generally results in multiple discrete Doppler shifts which can be associated with actual ionospheric modes in existence between the transmitter and receiver terminals at the operating frequency. The invention covers the application of monopulse direction finding techniques through the isolation of energy in each Doppler shifted mode through the use of high resolution spectrum analysis. More particularly, azimuth information is obtained by using the amplitude and/or phase responses of two antennae beams preferably in a monopulse configuration for each Doppler shifted mode.

摘要翻译： 准正弦信号源的天波传播通常导致多个离散的多普勒频移，其可以在工作频率下与发射机和接收机终端之间存在的实际电离层模式相关联。 本发明通过使用高分辨率频谱分析在每个多普勒频移模式中通过隔离能量来覆盖单脉冲测向技术的应用。 更具体地，通过对于每个多普勒频移模式，优选地以单脉冲配置来使用两个天线波束的振幅和/或相位响应来获得方位信息。

公开(公告)号：US06707558B2

公开(公告)日：2004-03-16

申请号：US09921383

申请日：2001-08-02

申请人： Sidney M. Bennett

发明人： Sidney M. Bennett

IPC分类号： G01B902

CPC分类号： G01R15/246

摘要： The invention relates to the field of fiber optics, and more particularly to birefringence in single-mode fibers. The sensitivity of a fiber optic sensor coil for a current sensor may be increased by winding the sensing fiber, without torsion, around a current-carrying wire to form the coil, wherein the pitch angle of the fiber may be selected to result in a phase shift due to Berry's phase of circularly polarized light propagating through the fiber. Preferably, the pitch angle may be approximately 60°.

摘要翻译： 本发明涉及光纤的领域，更具体地涉及单模光纤中的双折射。 用于电流传感器的光纤传感器线圈的灵敏度可以通过绕传感线卷绕感应光纤而不受扭曲而增加，以形成线圈，其中可以选择光纤的俯仰角以产生相位 由于通过纤维传播的圆偏振光的贝里相位移动。 优选地，俯仰角可以是大约60°。

公开(公告)号：US06563589B1

公开(公告)日：2003-05-13

申请号：US09615166

申请日：2000-07-13

申请人： Sidney M. Bennett ,  Richard B. Dyott

发明人： Sidney M. Bennett ,  Richard B. Dyott

IPC分类号： G01B902

CPC分类号： G01R15/246 ,  G01C19/721

摘要： A reduced minimum configuration (RMC) fiber optic current sensor (FOCS) is proposed which includes a sensing coil or sensing region, a light source and an optical path arranged between the front output of the light source and the fiber optic sensing coil/region. At least one quarter wave plate is disposed between the optical path and the sensing coil/region for converting linearly polarized light beams into circularly polarized light beams propagating through the sensing coil/region. The circularly polarized light beams propagating though the sensing region experience a differential phase shift caused by a magnetic field or current flowing in a conductor proximate to the sensing coil. A light detector is located at the back output of the light source and produces an output signal in response to return light intensity transmitted through the light source. The return light intensity is a measure of the magnetic field in the sensor coil/region. The magnetic field may be produced by an electric current flowing through a wire, wherein the sensor coil can be wound around the wire. Electronics is described which minimizes effects caused by changes in the environmental conditions.

摘要翻译： 提出了一种减小的最小配置（RMC）光纤电流传感器（FOCS），其包括感测线圈或感测区域，光源和布置在光源的前端输出与光纤感测线圈/区域之间的光路。 至少四分之一波片设置在光路和感测线圈/区域之间，用于将线性偏振光束转换成通过感测线圈/区域传播的圆偏振光束。 通过感测区域传播的圆偏振光束经历由接近感测线圈的导体中流动的磁场或电流引起的差分相移。 光检测器位于光源的后输出处，并且响应于通过光源传输的返回光强而产生输出信号。 返回光强度是传感器线圈/区域中的磁场的量度。 磁场可以通过流过电线的电流产生，其中传感器线圈可以缠绕在电线上。 描述了最小化由环境条件变化引起的影响的电子装置。

公开(公告)号：US06370289B1

公开(公告)日：2002-04-09

申请号：US09481159

申请日：2000-01-12

申请人： Sidney M. Bennett

发明人： Sidney M. Bennett

IPC分类号： G02B600

CPC分类号： G01C19/721

摘要： The invention is directed to an apparatus and a method for reducing noise, in particular RIN noise, in optical sensors, in particular fiber-optic sensors. The optical sensor produces a sensor output signal representing a physical quantity to be measured and also contains a first noise component, which is detected by a first detector. A separate detector detects an input light noise component of the input light source of the optical sensor and produces a second noise component. The second noise component is electronically processed and time-delayed or phase shifted by a time delay which substantially correspond to the time delay experienced by the sensor input light traversing the optical sensor. The time-delayed processed signal is then subtracted from the sensor output signal to produce a reduced noise optical sensor signal corresponding to the measured physical quantity.

摘要翻译： 本发明涉及用于在光学传感器，特别是光纤传感器中降低噪声，特别是RIN噪声的装置和方法。 光学传感器产生表示要测量的物理量的传感器输出信号，并且还包含由第一检测器检测的第一噪声分量。 单独的检测器检测光学传感器的输入光源的输入光噪声分量并产生第二噪声分量。 第二噪声分量被电子处理和时间延迟或相移一个时间延迟，其基本上对应于传感器输入光穿过光学传感器所经历的时间延迟。 然后从传感器输出信号中减去时间延迟处理的信号，以产生对应于测量的物理量的降低的噪声光学传感器信号。