FASEROPTISCHE ANORDNUNG ZUM MESSEN DER STÄRKE EINES ELEKTRISCHEN STROMES
    8.
    发明授权
    FASEROPTISCHE ANORDNUNG ZUM MESSEN DER STÄRKE EINES ELEKTRISCHEN STROMES 失效
    光纤配置用于测量电流的强度。

    公开(公告)号:EP0483189B1

    公开(公告)日:1993-12-22

    申请号:EP90910592.6

    申请日:1990-07-12

    IPC分类号: G01R15/07

    CPC分类号: G01R15/246

    摘要: In a fibre optic arrangement for measuring the strength of an electric current using the Faraday effect, the magnetic field surrounding the current-carrying conductors (1) influence the polarization condition of the light which travels through the core of an optical fibre (2) surrounding the conductor (1) in the form of a winding (3). A reflecting surface (5) is provided at one end (4) of the optical fibre (2) and the light enters and leaves at the other end (6). In order to exploit the advantages of the twisting of the optical fibre while reducing all other measurement errors, circular double refraction is conferred in a known manner on the optical fibre (2) by twisting it about its longitudinal axis, and the end (4) of the optical fibre (2) with the reflecting surface is arranged in the immediate vicinity of the other end (6) so that the whole optical fibre (2) forms an almost completely closed loop.