-
公开(公告)号：US5371593A
公开(公告)日：1994-12-06
申请号：US938294
申请日：1992-08-31
申请人： Amado Cordova , Donald J. Bilinski , Samuel N. Fersht , Glenn M. Surabian , John D. Wilde , Paul A. Hinman
发明人： Amado Cordova , Donald J. Bilinski , Samuel N. Fersht , Glenn M. Surabian , John D. Wilde , Paul A. Hinman
CPC分类号： G02B6/4457 , G01C19/722
摘要： A sensor coil for a fiber optic gyroscope. The coil is formed on a spool of carbon composite material or of another material whose coefficient of thermal expansion approximates that of the overlying windings of the glass optical fiber. The windings are potted in an adhesive material. Various bias effects are addressed by the coil design. The close matching of the thermal expansion characteristics of the spool and the fiber windings as well as proper selection of the coil potting material minimize the Shupe-like bias caused by thermal stress that would be otherwise exerted by a standard metallic spool. By careful selection of potting material (particularly its modulus of elasticity) vibration-induced bias, coil cracking, degradation of h-parameter and temperature-ramp bias sensitivity are also minimized.
摘要翻译： 用于光纤陀螺仪的传感器线圈。 线圈形成在碳复合材料的卷轴上，或者其热膨胀系数接近玻璃光纤的上覆绕组的材料。 绕组以一种粘合剂材料灌装。 线圈设计可以解决各种偏压效应。 卷轴和纤维绕组的热膨胀特性的紧密匹配以及线圈灌封材料的适当选择最小化了由标准金属线轴施加的热应力引起的Shupe样偏差。 通过仔细选择灌封材料（特别是其弹性模量）振动引起的偏压，线圈破裂，h参数的降低和温度 - 斜坡偏差灵敏度也被最小化。
-
公开(公告)号：US5545892A
公开(公告)日：1996-08-13
申请号：US299585
申请日：1994-09-01
CPC分类号： G01C19/722 , G02B6/4457
摘要： A spool for receiving a fiber optic sensor coil includes a single, substantially-planar mounting flange and a central hub. The coil can be directly wound upon the hub. The coil is mounted transverse to the plane of the mounting flange and is unconfined in that direction as the surface of the hub is substantially non-adhesive with respect to the inner layer of the coil. This allows axial coil expansion with increases in temperature without generating gyro bias errors. The device is also substantially free from vibration-induced bias errors due to the relatively high resonant frequency (vis a vis environmental vibration) of the integral spool-plus-coil structure.
摘要翻译： 用于接收光纤传感器线圈的线轴包括单个基本上平面的安装凸缘和中心毂。 线圈可以直接缠绕在轮毂上。 线圈横向于安装凸缘的平面安装，并且在该方向上不受约束，因为毂的表面相对于线圈的内层基本上是非粘性的。 这允许在不产生陀螺仪偏置误差的情况下随着温度升高而轴向线圈膨胀。 由于整体的线轴加线圈结构的相对高的共振频率（相对于环境振动），该装置也基本上没有振动引起的偏置误差。
-
公开(公告)号：US5767509A
公开(公告)日：1998-06-16
申请号：US774109
申请日：1996-12-24
申请人： Amado Cordova , Samuel N. Fersht
发明人： Amado Cordova , Samuel N. Fersht
CPC分类号： G01C19/722
摘要： A sensor coil for a fiber optic gyroscope. At least one dummy layer forms an integral structure with, and shares the thermal expansion characteristics of, a potted coil comprising a plurality of layers of windings of a first optical fiber. In a gyroscope, the potted coil is arranged to receive the output of a source of optical energy as a pair of beams that counter-propagate therein and to provide the resultant interference pattern, as gyro output, to a detector. The dummy layer displaces layers or windings of the potted coil from regions likely to contribute to Shupe bias effects.
摘要翻译： 用于光纤陀螺仪的传感器线圈。 至少一个虚设层与包括第一光纤的多个绕组层的封套线圈形成一个整体结构并具有共享热膨胀特性。 在陀螺仪中，封装线圈被布置为接收光能源的输出作为在其中反向传播的一对光束，并将合成的干涉图案作为陀螺仪输出提供给检测器。 虚拟层将盆状线圈的层或绕组从可能有助于Shupe偏置效应的区域移位。
-
公开(公告)号：US6064630A
公开(公告)日：2000-05-16
申请号：US114583
申请日：1998-07-13
申请人： Samuel N. Fersht , David B. Hall
发明人： Samuel N. Fersht , David B. Hall
CPC分类号： G01L9/0077
摘要： A system for measuring changes in an environmental parameter such as displacement, velocity, acceleration, or pressure, includes a laser for providing a pulsed, coherent light signal, and an interferometer having a first and second optical legs of unequal optical path lengths. The signal is split into first and second beams that are directed into the first and second optical legs. Either a fixed mirror disposed on a frame or a moving mirror on one side of the proof mass reflects the first beam received at the end of the first optical leg. The frame also suspends a proof mass at opposite ends. An optical pick-off embodied in a movable mirror formed on the proof mass reflects the second beam received from the end of the second optical leg. The proof mass with mirror moves in response to changes in the value of the parameter to be measured. An optical coupler combines the first and second beams after they have been reflected back into their respective optical legs, producing an interference signal, which is detected by an optical detector. The detector generates an electronic signal, which is analyzed in a microcomputer. To compensate for gravity, the proof mass has an asymmetrical profile. As a velocity sensor for seismic measurements, its construction is guided by the mass of the proof mass and spring stiffness of the hinges. Represented mathematically, those terms are selected to minimize the acceleration and displacement components, leaving only the velocity component as a function of the ratio of mass to damping coefficients.
摘要翻译： 用于测量诸如位移，速度，加速度或压力的环境参数变化的系统包括用于提供脉冲的相干光信号的激光器和具有不等的光程长度的第一和第二光学支路的干涉仪。 信号被分成被引导到第一和第二光学腿中的第一和第二光束。 布置在框架上的固定反射镜或证明物质一侧上的移动镜反射在第一光学腿的端部处接收的第一光束。 该框架还在相对端悬挂一个检测质量块。 形成在证明物质上的可移动镜中实现的光学拾取器反射从第二光学腿的端部接收的第二光束。 响应于要测量的参数的值的变化，具有镜的校验质量移动。 光耦合器在将第一和第二光束反射回各自的光学腿之后组合第一和第二光束，产生由光学检测器检测的干涉信号。 检测器产生电子信号，在微机中进行分析。 为了补偿重力，证明物质具有不对称的轮廓。 作为用于地震测量的速度传感器，其结构由铰链质量和弹簧刚度的质量指导。 以数学方式表示，选择这些术语以最小化加速度和位移分量，仅将速度分量作为质量与阻尼系数的比率的函数。
-
公开(公告)号：US06363786B1
公开(公告)日：2002-04-02
申请号：US09627688
申请日：2000-07-28
申请人： Samuel N. Fersht
发明人： Samuel N. Fersht
IPC分类号： G01P1508
CPC分类号： G01P15/00 , G01P15/093
摘要： A fiber optic particle motion accelerometer has a housing with a mid-section mounted therein such that the mid-section flexes in response to acceleration along a sensing axis. A proof mass is mounted to an outer edge of the mid-section. A first spiral-wound optical fiber coil is mounted to a first side of the mid-section and a second spiral-wound optical fiber coil is mounted to a second side of the mid-section. A first hinge is formed in the mid-section adjacent the mounting of the mid-section in the housing, and a second hinge is formed in the mid-section between the proof mass and the first and second fiber optic coils. The optical fiber coils are included in an interferometer such that acceleration along the sensing axis produces a phase difference between optical signals propagating in the optical fiber coils.
摘要翻译： 光纤粒子运动加速度计具有安装在其中的中间部分的壳体，使得中间部分响应于沿感测轴线的加速度而弯曲。 检测质量安装在中段的外边缘。 第一螺旋缠绕光纤线圈安装到中间部分的第一侧，并且第二螺旋缠绕光纤线圈安装到中间部分的第二侧。 第一铰链形成在靠近壳体中间部分的安装的中间部分中，并且第二铰链形成在检测质量体与第一和第二光纤线圈之间的中间部分中。 光纤线圈包括在干涉仪中，使得沿感测轴的加速度产生在光纤线圈中传播的光信号之间的相位差。
-
公开(公告)号：US6085590A
公开(公告)日：2000-07-11
申请号：US126829
申请日：1998-07-31
CPC分类号： G01C19/56
摘要： A multisensor includes a ring-like piezoelectric drive. The ring, which may comprise a closed configuration formed of straight ring segments, surrounds a rotor assembly formed of a pair of rotors, each having a central hub. Vanes extend radially from the central hubs of the rotors to the inner surface of the ring and are fixed to the ring adjacent the intersections of the substantially-straight ring segments. The ring is formed of a laminate of layers of piezoelectric material. Adjacent layers are of opposite piezoelectric polarity whereby an a.c. signal drives the alternating expansions and contractions of pairs of laminated layers.
摘要翻译： 多传感器包括一个环状压电驱动器。 可以包括由直环段形成的闭合构造的环围绕由一对转子形成的转子组件，每个转子具有中心毂。 叶片从转子的中心轮毂径向延伸到环的内表面，并且固定到邻近基本上直的环段的交叉点的环。 环由压电材料层的叠层形成。 相邻的层具有相反的压电极性， 信号驱动层叠层对的交替扩张和收缩。
-
公开(公告)号：US6141474A
公开(公告)日：2000-10-31
申请号：US118229
申请日：1998-07-17
申请人： Samuel N. Fersht
发明人： Samuel N. Fersht
CPC分类号： G02B6/4457 , G01C19/722
摘要： To minimize the uncompensated part of the Shupe error, a one or more continuous coils (28, 44, 46) thermally stable material is added to a composite coil assembly (20) to dominate the composite in terms of thermal expansion and elastic modulus. The thermally stable material includes a plurality of continuously coiled fibers (28, 44, 46) selected from a material group which possesses a high modulus and a low coefficient of thermal expansion. The preferred fiber is formed from a carbon-graphite material which is selectively wound within the optical fibers (22) in the coil assembly and/or is wound about the interior and exterior circumferences of the coil assembly.
摘要翻译： 为了最小化Shupe误差的未补偿部分，将一种或多种连续线圈（28,44,46）热稳定材料添加到复合线圈组件（20），以根据热膨胀和弹性模量来支配复合材料。 热稳定材料包括选自具有高模量和低热膨胀系数的材料组的多个连续卷绕的纤维（28,44,46）。 优选的纤维由碳 - 石墨材料形成，所述碳 - 石墨材料选择性地缠绕在线圈组件中的光纤（22）内和/或缠绕在线圈组件的内外周上。
-
8.发明授权
公开(公告)号：US5428995A
公开(公告)日：1995-07-04
申请号：US27754
申请日：1993-03-08
摘要： A sensor for measuring angular rotation rates about three orthogonal axes is based upon sensing Coriolis acceleration forces with a pair of nearly-identical rotors coupled coaxialy by a torsion spring and counter-oscillating in rotation. The torsional oscillator is mounted within a case by means of radial vanes, each comprisig two piezoelectric ceramic plates bonded to a thin metal core responsive to drive signals and providing rotational vibration isolation. The arms of the rotors are designed as piezoelectric open loop accelerometers. Electrodes of selected configurations are mounted to the outer surfaces of the planar members to collect charge indicative of Coriolis accelerations proportional to the angular rotations about the orthogonal axes.
摘要翻译： 用于测量围绕三个正交轴的角度旋转速度的传感器基于用一对几乎相同的转子感测科里奥利加速力，该转子通过扭转弹簧共轴耦合并且在旋转中相反振荡。 扭转振荡器通过径向叶片安装在壳体内，每个都包含两个压电陶瓷板，它们响应于驱动信号和提供旋转振动隔离而结合到薄金属芯上。 转子的臂被设计为压电开环加速度计。 所选构造的电极安装到平面构件的外表面以收集指示与围绕正交轴线的角旋转成比例的科里奥利加速度的电荷。
-
9.发明授权Three axis inertial measurement unit with counterbalanced, low inertia mechanical oscillator 失效具有平衡，低惯量机械振荡器的三轴惯性测量单元
公开(公告)号：US5065627A
公开(公告)日：1991-11-19
申请号：US595531
申请日：1990-10-11
IPC分类号： G01C19/5705 , G01C19/5783 , G01C21/16
CPC分类号： G01C19/5783 , G01C19/5705
摘要： A three axis inertial measurement unit is shown having a low inertia mechanical oscillator formed from two platforms counterbalanced against each other. Each platform is dithered at its natural frequency about a single torsional axis. A plurality of accelerators are mounted upon at least one of the counterbalanced platforms with each accelerometer having at least an input axis mounted at a predetermined angle to the torsional axis and to the platform. Each platform has a three legged, Y-shaped mounting member with a rotor member positioned between the legs of the mounting member. Web members which form the legs of the mounting member join the rotor member to the Y-shaped mounting member. Additionally, driving webs are mounted on each side of the web members for further joining the mounting member to the rotary member.
摘要翻译： 三轴惯性测量单元被示出具有由彼此平衡的两个平台形成的低惯性机械振荡器。 每个平台以固定频率绕单个扭转轴进行抖动。 多个加速器安装在至少一个平衡平台上，每个加速度计具有至少一个输入轴线，其以与扭转轴线和平台成预定角度安装。 每个平台具有三腿Y形安装构件，其具有定位在安装构件的腿之间的转子构件。 形成安装构件的腿的网构件将转子构件连接到Y形安装构件。 此外，驱动腹板安装在腹板构件的每一侧上，以进一步将安装构件接合到旋转构件。
-
10.发明授权公开(公告)号：US06618523B2
公开(公告)日：2003-09-09
申请号：US09962396
申请日：2001-09-25
申请人： David B. Hall , Samuel N. Fersht
发明人： David B. Hall , Samuel N. Fersht
IPC分类号： G02B642
CPC分类号： G01L9/0077
摘要： A system for measuring changes in an environmental parameter, such as velocity or pressure, includes an optical signal source for providing a coherent light signal, and an interferometer having a first and second optical legs of unequal optical path lengths. The signal is split into first and second beams that are respectively directed into the first and second optical legs of the interferometer. A fixed mirror reflects the first beam received at the end of the first optical leg. An optical pick-off includes a movable mirror, positioned to reflect the second beam received from the end of the second optical leg. The movable mirror is movable in response to changes in the-value of the parameter to be measured. An optical coupler combines the first and second beams after they have been reflected back into their respective optical legs, producing an interference signal, which is detected by an optical detector. The detector generates an electronic signal having a value indicative of the value of the interference signal. The electronic signal is analyzed to correlate its value to changes in the value of the environmental parameter to be measured.
摘要翻译： 用于测量诸如速度或压力的环境参数的变化的系统包括用于提供相干光信号的光信号源，以及具有不等光路长度的第一和第二光学腿的干涉仪。 信号被分成分别引导到干涉仪的第一和第二光学腿的第一和第二光束。 固定镜反射在第一光学腿的末端接收的第一光束。 光学拾取器包括可移动镜，其被定位成反射从第二光学腿的端部接收的第二光束。 可动反射镜可响应待测参数值的变化而移动。 光耦合器在将第一和第二光束反射回各自的光学腿之后组合第一和第二光束，产生由光学检测器检测的干涉信号。 检测器产生具有指示干扰信号的值的值的电子信号。 分析电子信号，将其值与要测量的环境参数值的变化相关联。
-
-
-
-
-
-
-
-
-
搜索结果
21 条记录 (耗时 0.025 秒)
