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    Sensor coil and current sensor with thermal stability
    1.
    发明专利
    Sensor coil and current sensor with thermal stability 有权
    传感器线圈和具有热稳定性的电流传感器

    公开(公告)号：JP2005077418A

    公开(公告)日：2005-03-24

    申请号：JP2004256772

    申请日：2004-09-03

    Applicant: Abb Res Ltd ,  アーベーベー・リサーチ・リミテッドAbb Research Ltd.

    Inventor： BOHNERT KLAUS ,  GABUS PHILIPPE ,  BRAENDLE HUBERT

    IPC: G01R15/24 ,  G01R33/032

    CPC classification number: G01R15/246 ,  G01R33/032

    Abstract: PROBLEM TO BE SOLVED: To provide a sensor for electric or magnetic field without deficiencies of conventional technique. SOLUTION: A sensor head 2 can be bent in the domain of sensor fiber 3. Friction depressant 7 is contained in a capillary tube 6 to reduce frictional force between the sensor fiber 3 and the capillary tube 6. The frictional depressant 7 is oil or dry lubricant. The capillary tube 6 is enveloped with a capillary tube sheath 8. The sensor head 2 makes it possible to measure current in conductor of large cross-section by its easy mounting on conductor, in addition to measurement independent of temperature. COPYRIGHT: (C)2005,JPO&NCIPI

    Abstract translation: 要解决的问题：提供用于电场或磁场的传感器，而没有常规技术的缺陷。 解决方案：传感器头2可以在传感器光纤3的区域中弯曲。摩擦抑制剂7容纳在毛细管6中，以减少传感器光纤3和毛细管6之间的摩擦力。摩擦抑制剂7是 油或干润滑剂。 毛细管6被毛细管鞘8包围。除了独立于温度的测量之外，传感器头2可以通过其容易地安装在导体上来测量大截面的导体中的电流。 版权所有（C）2005，JPO＆NCIPI

    sensor a laser de fibra de alta resolução
    2.
    发明专利
    sensor a laser de fibra de alta resolução 未知

    公开(公告)号：BRPI0309675B1

    公开(公告)日：2016-11-29

    申请号：BR0309675

    申请日：2003-04-29

    Applicant: ABB OFFSHORE SYSTEMS LTD ,  ABB RESEARCH LTD ,  GE OIL & GAS UK LTD ,  VETCO GRAY CONTROLS LTD

    Inventor： FRANK ANDREAS ,  BRÄNDLE HUBERT ,  HAROUD KARIM ,  BOHNERT KLAUS

    IPC: G01D5/353 ,  G01D5/34 ,  G01L1/24 ,  G01L9/00 ,  G01L11/02 ,  H01S3/067 ,  H01S3/08 ,  H01S3/098

    Abstract: "sensor a laser de fibra de alta resolução". a presente invenção refere-se a um sensor a laser de fibra de alta resolução para medir uma quantidade a ser medida (m), que tem uma fonte de luz de bombeamento (2), um laser de fibra (1) e uma unidade de detecção/ avaliação (3). o laser de fibra (1) tem: um primeiro refletor de extremidade birrefringente (11) e um segundo refletor de extremidade (12), uma fibra de amplificação de laser (13), uma fibra sensora (14) e um meio para acoplamento de modo (15). a fibra de amplificação de laser (13), a fibra sensora (14) e o meio para acoplamento de modo (15) são dispostos entre o refletores de extremidade (11, 12). no laser de fibra (1), luz é capaz de se propagar em dois estados óticos (x,y; lp ~ 01~,lp ~ 11~), que são ortogonais um ao outro devido a sua polarização e/ou sua estrutura de espaço transversal. os estados óticos ortogonais (x,y; lp ~ 01~,lp ~ 11~) podem ser acoplados um ao outro pelo meio para acoplamento de modo (15). no laser de fibra (1) um número de modos longitudinais (lm^ x^~ p~, lm^ x^~ p+1~..., lm^ y^~ q~, lm^ y^~ q+1~..., lm^ 01^~ p~, lm^ 01^~ p+1~..., lm^ 11^~ q~, lm^ 11^~ q+1~...) são capazes de oscilar em cada um dos dois estados óticos (x,y; lp ~ 01~,lp ~ 11~). na fibra sensora (14) uma mudança na birrefringência para os dois estados óticos ortogonais (x,y; lp ~ 01~,lp ~ 11~) pode ser obtida pela interação da quantidade a ser medida (m) com a fibra sensora (14). a mudança na birrefringência resulta em uma mudança nas freqüências de batimento na emissão do laser. devido ao fato de que o primeiro refletor de extremidade (11) é dessintonizado com relação ao segundo refletor de extremidade (12), é possível detectar sinais de batimento individuais do modo de polarização em lugar de um sinal de batimento que consiste em um número de sinais de pmb degenerados e é, portanto, ampliado. uma alta resolução de sensor é obtida.

    A METHOD FOR PRODUCING A FIBEROPTIC WAVEGUIDE WITH A PHASE SHIFT SEGMENT
    5.
    发明专利
    A METHOD FOR PRODUCING A FIBEROPTIC WAVEGUIDE WITH A PHASE SHIFT SEGMENT 未知

    公开(公告)号：CA2326960C

    公开(公告)日：2011-04-19

    申请号：CA2326960

    申请日：2000-11-28

    Applicant: ABB RESEARCH LTD

    Inventor： BOHNERT KLAUS ,  BRANDLE HUBERT ,  GABUS PHILIPPE

    IPC: G02F1/01 ,  C03B37/15 ,  G02B6/10 ,  G02B6/255 ,  G02B6/34

    Abstract: A method is described for producing a fiberoptic waveguide with a basic segment (11) and a phase shift segment (12), the basic segment (11) and phase shift segment (12) having fiber cores (K) of the same form and the fiber cores being aligned at a defined angle (.alpha.) to one another. In the method, use is made of an optical fiber (1) having a fiber core (K) of the abovenamed form, which fiber is twisted at least approximately by the abovenamed defined angle (.alpha.) and held fixed in this torsional position. Subsequently, a stress-relief zone (13) is heated inside the twisted fiber (1) until the torsion is released inside the stress-relief zone (13) and the basic segment (11) is produced on one side of the stress-relief zone (13) and the phase shift segment (12) is produced on the other side. In this case, the fixing of the torsional position is maintained until after solidification of the stress-relief zone (13).

    Fiber-optic current sensor
    10.
    发明专利
    Fiber-optic current sensor 未知

    公开(公告)号：AU6573801A

    公开(公告)日：2002-01-21

    申请号：AU6573801

    申请日：2001-07-04

    Applicant: ABB RESEARCH LTD

    Inventor： BOHNERT KLAUS

    IPC: G01R15/24 ,  G01R19/00 ,  G02B27/28

    Abstract: The invention relates to a fiber-optic current sensor that is provided with a reflection interferometer (1, 10). In its fiber-optic feed line (2), said fiber-optic current sensor comprises a polarization-maintaining first fiber branch (20) for two forward propagating orthogonally polarized waves and a polarization-maintaining second fiber branch (20') for two backward propagating orthogonally polarized waves. Said fiber branches (20, 20') are interlinked via a coupler (8) provided in the sensor. The first fiber branch (20) is linked with a light source (4) and the second fiber branch (20') is linked with the detector (5). A phase-shift device (7) is functionally linked with at least one of the fiber branches (20, 20'), thereby allowing a quasi-static control of the phase shift of the waves. As a result, the phase-shift device does not have to meet such strict requirements as the phase modulators and signal processors that are generally used in conventional current sensors.

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