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    • 5. 发明授权
    • Gyro sensor coil with filled optical fiber
    • 陀螺传感器线圈带有光纤
    • US5870194A
    • 1999-02-09
    • US904926
    • 1997-08-01
    • Amado CordovaJohn P. Rahn
    • Amado CordovaJohn P. Rahn
    • G01C19/72G02B6/00
    • G01C19/722
    • A sensor coil for a fiber optic gyroscope includes fiber with an inner jacket of predetermined composition for reducing the effects of temperature-change-induced optical length asymmetry upon bias stability. Filler material of predetermined composition is combined with silicone and deposited upon the glass fiber, forming an inner jacket. The composition of the inner jacket is adjusted to thereby effect the Poisson ratio of the inner jacket and thereby reduce the isotropic thermally-induced pressure within the wound coil resulting in reduced temperature-induced optical length asymmetry and improved bias stability.
    • 用于光纤陀螺仪的传感器线圈包括具有预定组成的内护套的光纤,用于降低温度变化诱导的光学长度不对称对偏置稳定性的影响。 将预定组成的填充材料与硅树脂组合并沉积在玻璃纤维上,形成内护套。 内护套的组成被调节从而影响内护套的泊松比,从而降低缠绕线圈内的各向同性热诱导压力,导致降低的温度诱导的光学长度不对称性和改善的偏置稳定性。
    • 6. 发明授权
    • Fiber optic sensor coil and tool for forming same
    • 光纤传感器线圈及其形成工具
    • US06486960B2
    • 2002-11-26
    • US09795813
    • 2001-02-27
    • Amado CordovaThomas McLeanThomas Meloeny
    • Amado CordovaThomas McLeanThomas Meloeny
    • G01B902
    • G01C19/722
    • A tool for forming a sensor coil that may be employed, for example, in a fiber optic gyroscope with reduced Shupe effect-induced bias. The tool includes a takeup reel having a cylindrical mandrel with inner flanges fixed to its opposed ends sandwiched between two outer flanges. Each of the inner flanges includes a pair of radially-directed apertures that form a radially-directed wedge therebetween. A recess in the planar portion of each of the outer flanges that contacts an inner flange is aligned with the apertures. This permits the winding of the sensor coil to form climbing turns at the ends of wound layers that lie outside an encapsulated fiber pack. Such turns, which join layers with overlying layers, avoid crossovers and the resultant stress that contributes significantly to Shupe effect-induced bias. A sensor coil having reduced internal stress is thus also provided.
    • 用于形成传感器线圈的工具,其可以例如在具有减小的Shupe效应引起的偏压的光纤陀螺仪中使用。 该工具包括具有圆柱形心轴的卷取卷轴,其具有固定在夹在两个外凸缘之间的相对端部的内凸缘。 每个内凸缘都包括一对在其间形成径向楔形的径向定向的孔。 每个外凸缘的与内凸缘接触的平面部分中的凹部与孔对准。 这允许传感器线圈的卷绕在位于封装的纤维包之外的卷绕层的端部处形成攀登匝。 这样的匝连接层与上层,避免交叉和所产生的应力,显着影响Shupe效应诱导偏倚。 因此也提供了具有减小的内部应力的传感器线圈。
    • 7. 发明授权
    • Fiber optic gyroscope coil lead dressing and method for forming the same
    • 光纤陀螺线圈导线敷料及其形成方法
    • US5973783A
    • 1999-10-26
    • US127490
    • 1998-07-31
    • Eric Lee GoldnerThomas McLeanAmado CordovaKenneth BeanArthur D. Lang
    • Eric Lee GoldnerThomas McLeanAmado CordovaKenneth BeanArthur D. Lang
    • G01C19/72
    • G01C19/722
    • An improved dressing for the fiber optic leads of a fiber optic gyroscope sensing coil and method for forming the same. A pair of fiber optic leads connect the sensing coil of a rotation sensing device to an integrated optics chip. The fiber optic leads are originally arranged to extend around the fiber optic sensing coil in different directions. The leads are formed of unequal lengths, where the longer of the leads is extended along an outer circumference of the sensing coil. The longer lead is bent so that the circumferential direction of longer lead reverses itself, and the longer lead then extends around the sensing coil in the same direction as the shorter lead. A low modulus adhesive is applied to the leads and cured to initially bond the leads in place against the sensing coil. The pair of leads are then wound in the same circumferential direction adjacent to each other fashion around the outer circumference of the sensing coil. After the desired amount of winding has been completed, a predetermined length of each of the leads is left available to be routed to the rotation sensing device. The entire outer surface of the wound fiber optic leads surrounding the temporary adhesion is then coated with a low modulus adhesive and cured to bond the wound leads against the sensing coil structure.
    • 用于光纤陀螺仪感测线圈的光纤引线的改进的敷料及其形成方法。 一对光纤引线将旋转感测装置的感测线圈连接到集成光学芯片。 光纤引线最初布置成在不同方向上围绕光纤感测线圈延伸。 引线由不等长的长度形成,其中引线的较长者沿感测线圈的外圆周延伸。 较长的引线被弯曲,使得长引线的圆周方向自身反转,然后较长的引线在与较短的引线相同的方向上围绕感测线圈延伸。 将低模量粘合剂施加到引线上并固化以将引线初始地将引线固定在抵抗传感线圈的位置。 然后,一对引线围绕感测线圈的外圆周以相邻的方向缠绕在相同的圆周方向上。 在所需的卷绕量已经完成之后,每个引线的预定长度可用于路由到旋转感测装置。 围绕临时粘合的缠绕光纤引线的整个外表面然后用低模量粘合剂涂覆并固化以将缠绕引线抵靠感测线圈结构。
    • 9. 发明授权
    • Method and apparatus for overcoming cross-coupling in a fiber optic
gyroscope employing overmodulation
    • 在采用过调制的光纤陀螺仪中克服交叉耦合的方法和装置
    • US5682241A
    • 1997-10-28
    • US613558
    • 1996-03-11
    • John G. MarkDaniel A. TazartesAmado Cordova
    • John G. MarkDaniel A. TazartesAmado Cordova
    • G01C19/72
    • G01C19/72
    • A phase modulator applies sequences of artificial phase shifts in the region of overmodulation between light beams counterpropagating within the sensor coil of a Sagnac interferometer to obtain improved random walk performance. The sequences are composed of phase shifts of .+-.a.pi./2b and .+-.(4b-a).pi./2b where a is an odd integer and b is an integer greater than 1. The waveform for driving the phase modulator is derived from a 2.pi. radian mapping plotted so that adjacent driving signal values differ by a.pi./2b or -(4b-a).pi./2b in a first angular direction and by -a.pi./2b or by (4b-a).pi./2b in the opposite angular direction. Angular transitions about the mapping may be predetermined to generate a deterministic, random, or pseudo-random modulation sequence. In the event that a deterministic sequence is chosen, it is examined for orthogonality properties to assume zero average output bias from crosstalk.
    • 相位调制器在Sagnac干涉仪的传感器线圈内的反向传播的光束之间的过调制区域中施加人造相移序列,以获得改进的随机游走性能。 序列由+/- a pi / 2b和+/-(4b-a)pi / 2b的相移组成,其中a是奇整数,b是大于1的整数。用于驱动相位调制器的波形是 衍生自2 pi弧度映射,使得相邻的驱动信号值在第一角度方向上以pi-2b或 - (4b-a)pi / 2b和-a / 2b或由(4b-a)pi / 2b在相反的角度方向。 关于映射的角度转换可以被预先确定以产生确定性,随机或伪随机调制序列。 在选择确定性序列的情况下,检查正交性质以假定来自串扰的零平均输出偏差。
    • 10. 发明授权
    • Sensor coil with thermomechanically-matched spool for fiber optic
gyroscope
    • 用于光纤陀螺仪的热机械匹配卷轴的传感器线圈
    • US5486922A
    • 1996-01-23
    • US359424
    • 1994-12-20
    • Amado Cordova
    • Amado Cordova
    • G01C19/72G01C19/64
    • G01C19/722
    • A spool for receiving a fiber optic sensor coil is selectively fabricated of materials of different coefficients of thermal expansion to thereby mimic the anisotropic thermal expansion characteristics of a potted sensor coil. The spool can include one or a pair of planar flanges fixed to the end(s) of a central cylindrical hub. The hub is preferentially fabricated in part of a polymer while the flange(s) is of low coefficient of expansion material such as titanium to thereby approximate the differential thermal expansions of a potted sensor coil in the axial and radial directions, respectively.
    • 用于接收光纤传感器线圈的线轴由具有不同热膨胀系数的材料选择性地制造,从而模拟一个盆式传感器线圈的各向异性热膨胀特性。 阀芯可以包括固定到中心圆柱形毂的端部的一个或一对平面凸缘。 轮毂优选地制造在聚合物的一部分中,而凸缘具有低膨胀系数的材料,例如钛,从而分别近似于盆式传感器线圈在轴向和径向方向上的差热膨胀。