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：US06763153B2

公开(公告)日：2004-07-13

申请号：US10124186

申请日：2002-04-17

申请人： Sidney M. Bennett

发明人： Sidney M. Bennett

IPC分类号： G02B600

CPC分类号： G01C19/721 ,  G01D5/353 ,  G01D5/35322

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 by a filter by a time delay which substantially corresponds 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。 第二噪声分量被滤波器电子处理和延时，时间延迟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。

公开(公告)号：US06542651B2

公开(公告)日：2003-04-01

申请号：US10034541

申请日：2001-12-21

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.

公开(公告)号：US06441779B1

公开(公告)日：2002-08-27

申请号：US09607865

申请日：2000-06-30

申请人： Sidney M. Bennett ,  Ronald Paradis

发明人： Sidney M. Bennett ,  Ronald Paradis

IPC分类号： H40B7185

CPC分类号： G01S19/54 ,  G01S5/0247 ,  H01Q1/1257 ,  H01Q3/06

摘要： A system and a method for determining a satellite antenna attitude are disclosed. Radio signals from a satellite, such as a GPS satellite, are received by a plurality of coupled antenna elements forming an antenna array. Local attitude values of the antenna array and/or the antenna elements with respect to a reference plane are determined using a shaft encoder or gyro, whereas a carrier-phase antenna attitude is determined from the received radio signals. The array and/or array elements are rotated over a predetermined angle and a correction value of the antenna attitude is determined from a time-averaged difference between the local attitude values and the carrier-phase attitude values.

摘要翻译： 公开了一种用于确定卫星天线姿态的系统和方法。 来自诸如GPS卫星的卫星的无线电信号由形成天线阵列的多个耦合天线元件接收。 使用轴编码器或陀螺仪确定天线阵列和/或天线元件相对于参考平面的局部姿态值，而从所接收的无线电信号确定载波相位天线姿态。 阵列和/或阵列元件旋转预定角度，并且根据局部姿态值和载波相位姿态值之间的时间平均差来确定天线姿态的校正值。

公开(公告)号：US5512904A

公开(公告)日：1996-04-30

申请号：US259028

申请日：1994-06-13

申请人： Sidney M. Bennett

发明人： Sidney M. Bennett

IPC分类号： G01C21/00 ,  G01C19/00 ,  G01C21/28 ,  G01S5/14 ,  G01S19/48 ,  G01S19/53 ,  G08G1/0968 ,  H04B7/185

CPC分类号： G01C21/28 ,  G01S19/53

摘要： The method and apparatus of establishing a vehicle azimuth provides for the automatic establishment of the vehicle azimuth for a vehicle positioning mechanism, and the continued improvement of accuracy, if desired. The method and apparatus accomplishes this by obtaining an assumed initial azimuth and an actual path azimuth as the vehicle passes in the vicinity of a first beacon. The actual path azimuth can be determined as between the first beacon and a subsequent beacon further along the route, or alternatively, the first beacon can be associated with a restricted, travel path or path segment having the actual path azimuth at the exit of the maintenance garage or ferry dock. The vehicle positioning system dead reckons its position from the vicinity of the first beacon and establishes an apparent path azimuth for the vehicle over the same path having the actual path azimuth. The difference between the actual path azimuth and the apparent path azimuth is the initial offset angle. The initial offset angle corrects the assumed initial vehicle azimuth to obtain the vehicle azimuth. As the vehicle traverses more distance between the adjacent beacons or alternatively along the restricted travel path or path segment, the accuracy of the initial offset angle improves because the dead reckoning calculation becomes more accurate. Furthermore, when the vehicle passes a subsequent beacon, any ambiguity with respect to the vehicle azimuth is corrected because the coordinates of the first and second beacons or, alternatively, of two GPS positions are known, and the actual path azimuth between the two beacons or positions can be used to offset the apparent path azimuth calculated solely by dead reckoning with the assumed initial vehicle azimuth.

摘要翻译： 建立车辆方位角的方法和装置提供了用于车辆定位机构的车辆方位的自动建立，并且如果需要，继续提高精度。 该方法和装置通过在车辆在第一信标附近通过时获得假设的初始方位角和实际路径方位来实现。 可以将实际路径方位角确定为沿着路线进一步的第一信标和后续信标之间，或者替代地，第一信标可以与具有维护出口处的实际路径方位角的受限的行进路径或路径段相关联 车库或轮渡码头。 车辆定位系统从第一信标附近估计其位置，并在具有实际路径方位的相同路径上建立车辆的视在路径方位角。 实际路径方位角和视在路径方位角之差是初始偏移角。 初始偏移角度校正假设的初始车辆方位角以获得车辆方位角。 当车辆穿过相邻信标之间的更远的距离或者可选地沿着限制的行进路径或路径段时，由于航位推算计算变得更准确，所以初始偏移角度的精度提高。 此外，当车辆通过随后的信标时，由于第一和第二信标的坐标，或者两个GPS位置的坐标是已知的，并且两个信标之间的实际路径方位角或者两个信标之间的实际路径方位角，所以修正了相对于车辆方位角的任何歧义 可以使用位置来偏移仅通过假定的初始车辆方位角的推算计算的视在路径方位角。

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。