公开(公告)号：US4929830A

公开(公告)日：1990-05-29

申请号：US267299

申请日：1988-11-04

申请人： Klaus Bohnert ,  Meinolph Kaufmann ,  Jurgen Nehring

发明人： Klaus Bohnert ,  Meinolph Kaufmann ,  Jurgen Nehring

IPC分类号： G01R15/24 ,  G01R29/08 ,  G01R29/12 ,  G02B6/00

CPC分类号： G01R29/0885 ,  G01R15/248 ,  G01R29/12

摘要： A fibre-optic sensor for measuring a particular directional component of an electric field comprises a piezoelectric body (4) and a glass fiber (5a) which is rigidly connected to the piezoelectric body (4) in a given length section. A crystal class and a crystallographic orientation of the piezoelectric body (4) is selected in such a manner that only the directional component which is parallel to a given body axis (h) of the piezoelectric body (4) causes a change in a length of the glass fiber (a) by means of an inverse piezoelectric effect. The change in length is measured interferometrically. In a preferred embodiment, the piezoelectric body has the shape of a disk, of a plate or of a hollow cylinder.

摘要翻译： 用于测量电场的特定方向分量的光纤传感器包括在给定长度部分中刚性地连接到压电体（4）的压电体（4）和玻璃纤维（5a）。 以这样的方式选择压电体（4）的晶体类和晶体取向，即只有平行于压电体（4）的给定体轴（h）的方向分量导致长度的变化 玻璃纤维（a）通过反压电效应。 长度的变化是通过干涉测量的。 在优选实施例中，压电体具有盘，板或中空圆筒的形状。

公开(公告)号：US5053694A

公开(公告)日：1991-10-01

申请号：US502339

申请日：1990-03-30

申请人： Klaus Bohnert ,  Jurgen Nehring

发明人： Klaus Bohnert ,  Jurgen Nehring

IPC分类号： G01R15/24 ,  G01R29/08 ,  G01R29/12

CPC分类号： G01R15/248 ,  G01R29/0885 ,  G01R29/12

摘要： A device for measuring an electric field comprises three optical fiber sensors, which each have a piezoelectric sensor element, as well as an interferometer for generating a sensor signal. The optical fiber sensors have piezoelectric sensor elements that exclusively detect with the aid of the inverse piezoelectric effect a predetermined directional component, assigned in each case, of the electric field. The directional components of the different sensor elements are each aligned perpendicular to one another. An evaluation circuit determines the absolute value and direction of the electric field from the sensor signals generated.The sensor elements are preferably formed by a single piezoelectric body, on whose faces the sensor fibers are fixed.

摘要翻译： 用于测量电场的装置包括三个光纤传感器，每个具有压电传感器元件，以及用于产生传感器信号的干涉仪。 光纤传感器具有压电传感器元件，其通过反向压电效应专门检测在每种情况下分配的电场的预定方向分量。 不同传感器元件的方向分量各自垂直于彼此对准。 评估电路根据所生成的传感器信号确定电场的绝对值和方向。 传感器元件优选地由单个压电体形成，传感器元件的表面固定有传感器光纤。

公开(公告)号：US5715058A

公开(公告)日：1998-02-03

申请号：US781749

申请日：1997-01-10

申请人： Klaus Bohnert ,  Jurgen Nehring

发明人： Klaus Bohnert ,  Jurgen Nehring

IPC分类号： G01D5/26 ,  G01J4/00 ,  G01M11/00 ,  G01N21/23 ,  G01R15/24

CPC分类号： G01R15/242

摘要： In order to detect, in particular, a high electric voltage (8), use is made of an electrooptic sensor with an electrooptic crystal (4) such as is applied in Pockels cells. Light is irradiated into the electrooptic crystal (4) in a linearly polarized fashion from a light source (L) via a fiber coupler (FK), a fiber-optic cable (F1), a collimator (K1), a 1st polarizer (P1), a beam splitter (1), and 1st and 2nd glass plates (2, 3). Located at the end face of said crystal is a 3rd glass plate (5) having a layer electrode (6) which simultaneously acts as a mirror (7) and retroreflects the incident light through the electrooptic crystal (4). One component beam (T1) of the reflected light passes back to a 1st light detector (D1) via the beam splitter (1) and the 1st polarizer (P1), now acting as an analyzer. A 2nd component beam (T2) passes to a 2nd light detector (D2) via a .lambda./4-delay plate (9), a 2nd polarizer (P2), a 90.degree. prism (10), a collimator (K2) and a 2nd fiber-optic cable (F2). Light intensities (I.sub.1) and (I.sub.2) are evaluated by means of a microprocessor (14). Owing to the fact that the two phase-shifted light signals are derived from a common optical channel, an intrinsic birefringence of the electrooptic crystal (4) does not affect their phase difference. A 9.degree. prism can be used instead of a mirror (7) for reversing the light. Input and output channels of the light can be separate. Ways are specified for the temperature compensation of a measurement result signal (S).

摘要翻译： 为了特别地检测高电压（8），使用具有电光晶体（4）的电光传感器，例如在普克尔斯细胞中应用。 光从光源（L）经由​​光纤耦合器（FK），光纤电缆（F1），准直器（K1），第一偏振器（P1）以线偏振的方式照射到电光晶体 ），分束器（1）和第一和第二玻璃板（2,3）。 位于所述晶体的端面处的是具有同时用作反射镜（7）并且通过电光晶体（4）反射入射光的层电极（6）的第三玻璃板（5）。 反射光的一个分量束（T1）经由分束器（1）和第一偏振器（P1）返回到第一光检测器（D1），现在用作分析器。 第二分量光束（T2）通过λ/ 4延迟板（9），第二偏振器（P2），90°棱镜（10），准直仪（K2）和 第二根光纤电缆（F2）。 光强度（I1）和（I2）通过微处理器（14）进行评估。 由于两个相移光信号是从公共光通道导出的，电光晶体（4）的固有双折射不影响它们的相位差。 可以使用9°棱镜来代替反光镜（7）来反转光。 灯的输入和输出通道可以分开。 指定测量结果信号（S）的温度补偿方法。

公开(公告)号：US08441249B2

公开(公告)日：2013-05-14

申请号：US12940684

申请日：2010-11-05

申请人： Klaus Bohnert ,  Stephan Wildermuth ,  Hubert Braendle

发明人： Klaus Bohnert ,  Stephan Wildermuth ,  Hubert Braendle

IPC分类号： G01R33/02

CPC分类号： G01R15/241

摘要： Two transversely poled fibers are disclosed which can be wound around a holder with their poling directions being anti-parallel. A coupling exchanges the polarization directions of the modes of the fibers. Thermally and mechanically caused birefringence changes can thereby be substantially cancelled, while electrical field induced birefringence changes can be added, to provide a more robust high voltage measuring device.

摘要翻译： 公开了两个横向极化纤维，其可以卷绕在保持器上，其极化方向是反平行的。 耦合交换纤维的模式的偏振方向。 因此，可以基本上消除热和机械引起的双折射变化，同时可以增加电场诱导的双折射变化，以提供更鲁棒的高电压测量装置。

公开(公告)号：US20100108870A1

公开(公告)日：2010-05-06

申请号：US12685372

申请日：2010-01-11

申请人： Axel KRAMER ,  Frank Kassubek ,  Klaus Bohnert ,  Hubert Braendle

发明人： Axel KRAMER ,  Frank Kassubek ,  Klaus Bohnert ,  Hubert Braendle

IPC分类号： G01L7/00 ,  G01J1/00

CPC分类号： G01L11/02 ,  G01L1/24

摘要： A pressure sensor is disclosed with at least one pressure sensing element, the pressure induced changes in the optical properties of which are evaluated by illumination with at least one light source. The pressure sensor can include at least two semiconductor-based pressure sensing elements located in individual pressure chambers, which sensing elements are located essentially adjacent to each other. The sensing elements can be irradiated with the same light source, wherein the light transmitted through the sensing elements is detected using at least two corresponding detectors, and wherein the differential pressure in the two pressure chambers is evaluated based on the output of these detectors.

摘要翻译： 公开了具有至少一个压力传感元件的压力传感器，通过用至少一个光源的照明来评估其光学性质的压力感应变化。 压力传感器可以包括位于各个压力室中的至少两个基于半导体的压力感测元件，这些感测元件基本上彼此相邻地定位。 感测元件可以用相同的光源照射，其中使用至少两个相应的检测器检测透过感测元件的光，并且其中基于这些检测器的输出来评估两个压力室中的压差。

公开(公告)号：US20090085337A1

公开(公告)日：2009-04-02

申请号：US12240111

申请日：2008-09-29

申请人： Josip Vlahovic ,  Ali Oezkan ,  Klaus Bohnert

发明人： Josip Vlahovic ,  Ali Oezkan ,  Klaus Bohnert

IPC分类号： B60R21/13

CPC分类号： B62D25/08 ,  B60R2021/135

摘要： A rollover protection device is disposed behind the vehicle seats of a motor vehicle, in particular a convertible with a convertible top, and has at least one rollover protection cassette containing a rollbar. It is important here that the at least one rollover protection cassette or a housing of the same is a supporting component of a stiffening support which is of multi-part construction and extends in the transverse direction of the vehicle.

摘要翻译： 翻车保护装置设置在机动车辆的车辆座椅后面，特别是具有可转换顶部的敞篷车，并且具有至少一个包含滚动杆的翻转保护盒。 重要的是，至少一个翻车保护盒或其壳体是加强支撑件的支撑部件，其是多部分构造并且在车辆的横向方向上延伸。

公开(公告)号：US20090039866A1

公开(公告)日：2009-02-12

申请号：US12256289

申请日：2008-10-22

申请人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

发明人： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

IPC分类号： G01R13/40

CPC分类号： G01R15/246

摘要： The current in a conductor is measured by exploiting the Faraday effect in a sensing fiber. The light returning from the sensing fiber is split into at least two parts, at least one of which is analyzed by a first circular analyzer for generating a first signal. A second part may e.g. be analyzed by a second circular analyzer, and a third part may be analyzed by a linear analyzer. By combining the signals obtained in this way, the current induced phase delay in the returning light can be measured efficiently and accurately.

摘要翻译： 导体中的电流通过利用传感光纤中的法拉第效应来测量。 从感测光纤返回的光被分成至少两个部分，其中至少一个由第一圆形分析器分析，用于产生第一信号。 第二部分可以例如。 由第二个圆形分析仪分析，第三个部分可以用线性分析仪进行分析。 通过组合以这种方式获得的信号，可以有效和准确地测量返回光中的电流感应相位延迟。

公开(公告)号：US07450792B2

公开(公告)日：2008-11-11

申请号：US11594170

申请日：2006-11-08

申请人： Klaus Bohnert ,  Philippe Gabus ,  Juergen Nehring ,  Hubert Braendle

发明人： Klaus Bohnert ,  Philippe Gabus ,  Juergen Nehring ,  Hubert Braendle

IPC分类号： G02B6/00

CPC分类号： G01R15/247 ,  G01R35/005

摘要： A fiber-optic sensor head is disclosed for an optical current or magnetic-field sensor which can have an optical fiber which includes a magnetooptically active sensor fiber which is optically connected to at least one polarization-defining element. The sensor fiber can be arranged in a magnetic field to be measured or around a conductor carrying current to be measured and can be in the form of a coil, with the coil defining a coil plane (A) with a surface normal (Ns), and with the at least one polarization-defining element having a marked axis (f). The sensor head can be flexible in the area of the sensor fiber, and an adjustment means can be provided for adjustment of a predeterminable angle β between the marked axis,(f) and the surface normal (Ns) or for adjustment of predeterminable angles β, β′ between the marked axes (f) and the surface normal (Ns).

摘要翻译： 公开了一种用于光电流或磁场传感器的光纤传感器头，其可以具有包括与至少一个偏振界定元件光学连接的磁光活性传感器光纤的光纤。 传感器光纤可以被布置在待测量的磁场中或围绕承载待测量电流的导体，并且可以是线圈的形式，线圈限定具有表面正常的线圈平面（A）（N

公开(公告)号：US07046867B2

公开(公告)日：2006-05-16

申请号：US10777403

申请日：2004-02-13

申请人： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

发明人： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

IPC分类号： G02B6/00

CPC分类号： G01R15/247

摘要： The invention relates to a fiberoptic current or magnetic field sensor having a plurality of sensor heads, and to a corresponding measurement method. The sensor has a light source: N≧2 sensor heads; at least one phase modulation unit; a detector; a control and evaluation unit. The at least one phase modulation unit is connected to at least one of the sensor heads. Lightwaves can be differentially phase-modulated in a non-reciprocal fashion by means of the at least one phase modulation unit. Modulation amplitudes φ0,n and modulation frequencies vn are selected as a function of modulation-relevant optical path lengths ln.

摘要翻译： 本发明涉及具有多个传感器头的光纤电流或磁场传感器，以及相应的测量方法。 传感器有一个光源：N> = 2个传感头; 至少一个相位调制单元; 检测器 一个控制和评估单位。 至少一个相位调制单元连接到至少一个传感器头。 光波可以通过至少一个相位调制单元以不可逆的方式进行差分相位调制。 作为调制相关光程长度l N n N的函数，选择调制幅度Φ0，n N和调制频率v N n N。

公开(公告)号：US20050088662A1

公开(公告)日：2005-04-28

申请号：US10922944

申请日：2004-08-23

申请人： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

发明人： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

IPC分类号： G01R15/24 ,  G01R33/032 ,  G01B9/02

CPC分类号： G01R15/246 ,  G01R33/032

摘要： The fiber-optic sensor head (2) for a current or magnetic field sensor comprises an optical fiber which contains a magnetooptically active sensor fiber (3) and at least one polarization-maintaining supply fiber (5), which are optically connected, with the sensor fiber (3) having its fiber protective sheath removed. The sensor head (2) furthermore contains a capillary (6), in which at least the sensor fiber (3) is arranged. Furthermore, the sensor head (2) can be bent in the area of the sensor fiber (3), and a friction reducing means (7) is provided in the capillary (6), in order to reduce the friction between the sensor fiber (3) and the capillary (6). The friction reducing means (7) is advantageously an oil or a dry lubricating means (7). The capillary (6) is advantageously encased by a capillary casing (8). The sensor (2) allows very largely temperature-dependent measurements, is easy to install and allows measurements on large cross-section conductors.

摘要翻译： 用于电流或磁场传感器的光纤传感器头（2）包括光纤，该光纤包含磁光有源传感器光纤（3）和至少一个光学连接的偏振保持光纤（5） 传感器光纤（3），其光纤保护套被去除。 传感器头（2）还包含毛细管（6），其中布置有至少传感器光纤（3）。 此外，传感器头（2）可以在传感器光纤（3）的区域中弯曲，并且在毛细管（6）中设置有摩擦减小装置（7），以便减少传感器光纤（ 3）和毛细管（6）。 减摩装置（7）有利地是油或干式润滑装置（7）。 毛细管（6）有利地由毛细管壳体（8）包围。 传感器（2）允许很大程度上依赖于温度的测量，易于安装并允许在大横截面导体上进行测量。