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    Electro-optical voltage sensor for high voltages
    21.
    发明授权
    Electro-optical voltage sensor for high voltages 有权
    用于高电压的电光电压传感器

    公开(公告)号：US06876188B2

    公开(公告)日：2005-04-05

    申请号：US10805517

    申请日：2004-03-22

    申请人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brändle

    发明人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brändle

    IPC分类号： G01R15/24 ,  G01R19/00 ,  G01R31/00

    CPC分类号： G01R15/242 ,  G01R15/247 ,  G01R19/0084

    摘要： The voltage sensor for measurement of a voltage V, which is present between two electrodes (3, 4) and generates an electric field E, comprises at least two layers (1a, 2a) made of electro-optically active material and being arranged along a light path (5). Through the layers there passes a light beam, the phase and/or state of polarization of which is influenced on account of the electro-optical effect. The orientation of the electro-optically active layers (1a, 2a) relative to the light path and the electric field E is chosen in such a way, that the influencing of the light (5) in the second layer (2a) counteracts the influencing of the light (5) in the first layer (1a). In this way, it is possible to realize a sensor with a high half wave voltage, so that high voltages V can be measured unambiguously. A plurality of first and second electro-optically active layers are advantageously arranged between the electrodes (3, 4).

    摘要翻译： 用于测量存在于两个电极（3,4）之间并产生电场E的电压V的电压传感器包括至少两层由电光活性材料制成的层（1a，2a），沿着 光路（5）。 通过这些层，通过光束，由于电光效应影响其相位和/或其极化状态。 以这样的方式选择电光活性层（1a，2a）相对于光路和电场E的取向，使得第二层（2a）中的光（5）的影响抵消影响 的第一层（1a）中的光（5）。 以这种方式，可以实现具有高半波电压的传感器，从而可以明确地测量高电压V. 多个第一和第二电光活性层有利地布置在电极（3,4）之间。

    Fiber-optic current sensor
    22.
    发明授权
    Fiber-optic current sensor 有权
    光纤电流传感器

    公开(公告)号：US06636321B2

    公开(公告)日：2003-10-21

    申请号：US09848210

    申请日：2001-05-04

    申请人： Klaus Bohnert

    发明人： Klaus Bohnert

    IPC分类号： G01B902

    CPC分类号： G01R15/246

    摘要： A fiber-optic current sensor has a reflection interferometer having a fiber-optic supply lead and a coil-shaped optical sensor fiber, the sensor fiber being connected with a first end to the fiber-optic supply lead, and being provided at a second, free end with a reflector. The fiber-optic supply lead has two fiber arms, which interconnect a detector-side and a sensor-side polarization-maintaining coupler. A phase modulator for modulating differential phases of two polarized waves propagating in the supply lead fiber is arranged in one of these two fiber arms, in which it modulates the differential phase of two waves polarized parallel to one another. Moreover, the sensor can change the direction of polarization in one of the two fiber arms, such that optical waves with orthogonally linear polarizations propagate in a segment of the supply lead fiber adjoining the sensor-side coupler. As a result, the advantages of the reflection interferometer can be combined with those of a Sagnac interferometer.

    摘要翻译： 光纤电流传感器具有反射干涉仪，其具有光纤供应引线和线圈形光学传感器光纤，该传感器光纤与第一端连接至光纤供应引线， 自由端与反射器。 光纤供应引线具有两个光纤臂，其将检测器侧和传感器侧偏振保持耦合器互连。 用于调制在供应引线光纤中传播的两个偏振波的微分相位的相位调制器被布置在这两个光纤臂之一中，其中它调制彼此平行偏振的两个波的差分相位。 此外，传感器可以改变两个光纤臂之一中的偏振方向，使得具有正交线性偏振的光波在邻近传感器侧耦合器的供电引线光纤的一段中传播。 因此，反射干涉仪的优点可以与Sagnac干涉仪的优点相结合。

    Fiber laser sensor for measuring differential pressures and flow velocities
    23.
    发明授权
    Fiber laser sensor for measuring differential pressures and flow velocities 有权
    用于测量压差和流速的光纤激光传感器

    公开(公告)号：US06597821B1

    公开(公告)日：2003-07-22

    申请号：US09869120

    申请日：2001-06-25

    申请人： Klaus Bohnert ,  Hubert Brändle

    发明人： Klaus Bohnert ,  Hubert Brändle

    IPC分类号： G02B6100

    CPC分类号： G01F1/44 ,  G01L1/246 ,  G01L11/025

    摘要： The present invention relates to a fiber laser pressure sensor 1 which is suitable in particular for measuring differential pressures and flow velocities v1 in oil boreholes. The fiber laser 2 according to the invention comprises two sensor fiber segments 5a, 5b subjected to different pressure loading, in which segments a birefringence proportional to the differential pressure &Dgr;p=p1−p2, and consequently a beat frequency, is induced between the polarization modes or spatial modes in the fiber laser 2. Exemplary embodiments with polarimetric monomode fibers 5a, 5b and/or with elliptical two-mode fibers 5a, 5b are specified. Furthermore, pressure-resistant multichamber sensor housings 25 and wavelength division multiplex arrangements are disclosed for the fiber laser pressure sensor 1. One advantage is that the pressure signal is wavelength-coded and thus highly insensitive to interference. It can be read out directly fiber-optically over large distances between the passively optical sensor head 1 and the optoelectronic measuring device 12, 17. One application concerns the measurement of a flow velocity v1 with the aid of a Venturi tube 23.

    摘要翻译： 本发明涉及一种光纤激光压力传感器1，其特别适用于测量油井中的压差和流速。 根据本发明的光纤激光器2包括经受不同压力负载的两个传感器光纤段5a，5b，其中在偏振模式之间感应出与压差DELTAp = p1-p2成比例的双折射以及因此的拍频 或空间模式。具体说明了具有偏振单模光纤5a，5b和/或椭圆形双模光纤5a，5b的示例性实施例。 此外，公开了用于光纤激光压力传感器1的耐压多室传感器壳体25和波分复用布置。一个优点是压力信号是波长编码的，因此对干扰非常不敏感。 它可以在被动光学传感器头1和光电测量装置12,17之间的大距离上直接光纤读出。一个应用涉及借助于文氏管23测量流速v1。

    Optical measurement of electrical quantities using inverse piezoelectric effect with dual double-mode fiber
    24.
    发明授权
    Optical measurement of electrical quantities using inverse piezoelectric effect with dual double-mode fiber 失效
    使用双重双模光纤的反压电效应对电量的光学测量

    公开(公告)号：US5343036A

    公开(公告)日：1994-08-30

    申请号：US44478

    申请日：1993-04-09

    申请人： Klaus Bohnert

    发明人： Klaus Bohnert

    IPC分类号： G01R15/24 ,  H01J5/16

    CPC分类号： G01R15/24

    摘要： In a fiber-optic sensor for measuring electric fields and voltages, in place of a double-mode fiber extending between sensor head (15) and evaluating unit (14) two separate, similar double-mode fibers (5a, 5b) are connected in series in the manner of a tandem interferometer. The first double-mode fiber (5a), serving as sensor fiber, is operated in reflection geometry. Together with the sensor element (6), it is disposed in the sensor head (15). The second double-mode fiber (5b), serving as reference fiber, is situated within the separate evaluating unit (14). Within the latter there is also provided at least one fiber coupler or beam splitter, which is required on account of the operation of the sensor fiber in reflection geometry. Sensor head (15) and evaluating unit (14) are connected by a single insensitive monomode fiber.

    摘要翻译： 在用于测量电场和电压的光纤传感器中，代替在传感器头（15）和评估单元（14）之间延伸的双模光纤，两个分开的相似的双模光纤（5a，5b）连接在 串联干涉仪的方式。 用作传感器光纤的第一双模光纤（5a）以反射几何形状操作。 与传感器元件（6）一起设置在传感器头（15）中。 用作参考光纤的第二双模光纤（5b）位于分离的评估单元（14）内。 在后者中，还提供至少一个光纤耦合器或分束器，由于传感器光纤在反射几何形状中的操作而需要。 传感器头（15）和评估单元（14）通过单个不敏感单模光纤连接。

    Fiber-optic sensor with first and second bimode fibers
    25.
    发明授权
    Fiber-optic sensor with first and second bimode fibers 失效
    具有第一和第二双模光纤的光纤传感器

    公开(公告)号：US5339026A

    公开(公告)日：1994-08-16

    申请号：US936799

    申请日：1992-08-28

    申请人： Klaus Bohnert

    发明人： Klaus Bohnert

    IPC分类号： G01R15/24 ,  G01R19/00 ,  G01R29/08

    CPC分类号： G01R29/0885 ,  G01R15/248

    摘要： In a fiber optic sensor for measuring electric fields and voltages, in place of a bimode fiber extending between sensor head (14) and evaluation unit (13) two separate bimode fibers (4a, 4b) of the same type are connected in series in the manner of a tandem interferometer. The first bimode fiber (4a) is disposed, together with the sensor element (6), in the sensor head (14). The second bimode fiber (4b) is situated within the separate evaluation unit (13). In this way, the sensor head (14) and the evaluation unit (13) are connected only by insensitive monomode fibers (2a, 2b).

    摘要翻译： 在用于测量电场和电压的光纤传感器中，代替在传感器头（14）和评估单元（13）之间延伸的双模光纤，两个相同类型的单独的双模光纤（4a，4b）串联连接 串联干涉仪的方式。 第一双模光纤（4a）与传感器元件（6）一起设置在传感头（14）中。 第二双模光纤（4b）位于分离的评估单元（13）内。 以这种方式，传感器头（14）和评估单元（13）仅由不敏感单模光纤（2a，2b）连接。

    Temperature compensated fiber optic current or magnetic field sensor with insensitivity to variations in sensor parameters
    28.
    发明授权
    Temperature compensated fiber optic current or magnetic field sensor with insensitivity to variations in sensor parameters 有权
    温度补偿光纤电流或磁场传感器，对传感器参数的变化不敏感

    公开(公告)号：US08461822B2

    公开(公告)日：2013-06-11

    申请号：US12889775

    申请日：2010-09-24

    申请人： Robert Wueest ,  Andreas Frank ,  Klaus Bohnert

    发明人： Robert Wueest ,  Andreas Frank ,  Klaus Bohnert

    IPC分类号： G01R31/00

    CPC分类号： G01R15/246 ,  G01R33/0322

    摘要： A fiber optic current or magnetic field sensor uses a sensing fiber in a coil for measuring a current or a magnetic field and has a retarder for converting between linearly polarized light and elliptically polarized light. The retardation of the retarder, its temperature dependence as well as its azimuth angle in respect to the plane of the fiber coil are optimized in dependence of the birefringence in the sensing fiber in order to minimize the influence of temperature variations and manufacturing tolerances on the overall scale factor of the sensor.

    摘要翻译： 光纤电流或磁场传感器使用线圈中的感测光纤来测量电流或磁场，并且具有用于在线偏振光和椭圆偏振光之间转换的延迟器。 延迟器的延迟，其温度依赖性以及相对于纤维线圈的平面的方位角根据感测光纤中的双折射进行优化，以便最小化温度变化和制造公差对整体的影响 传感器的比例因子。

    Optical high voltage sensor
    29.
    发明授权
    Optical high voltage sensor 有权
    光电高压传感器

    公开(公告)号：US08233754B2

    公开(公告)日：2012-07-31

    申请号：US12488779

    申请日：2009-06-22

    申请人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brändle

    发明人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brändle

    IPC分类号： G02B6/00 ,  G02B6/02

    CPC分类号： G01R15/242 ,  G01R15/247

    摘要： An electro-optical high-voltage sensor includes a waveguiding sensing fiber of an electro-optical material. The electrical field of the voltage to be measured is substantially parallel to the longitudinal axis of the sensing fiber. The sensing fiber carries two orthogonally polarized light waves, with the applied field affecting the birefringence between the waves. Using an electro-optical waveguiding fiber in this configuration allows the voltage between two widely spaced points to be accurately measured.

    摘要翻译： 电光高压传感器包括电光材料的波导感测光纤。 要测量的电压的电场基本上平行于感测光纤的纵向轴线。 感测光纤承载两个正交偏振光波，其中施加的场影响波之间的双折射。 在这种结构中使用电光波导纤维可以精确地测量两个广泛间隔的点之间的电压。