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    LIGHTNING CURRENT MEASURING DEVICE AND LIGHTNING CURRENT MEASURING METHOD
    1.
    发明公开
    LIGHTNING CURRENT MEASURING DEVICE AND LIGHTNING CURRENT MEASURING METHOD 审中-公开
    BLITZSTROMMESSVORRICHTUNG UND BLITZSTROMMESSVERFAHREN

    公开(公告)号：EP2980593A1

    公开(公告)日：2016-02-03

    申请号：EP14775266.1

    申请日：2014-03-24

    申请人： Mitsubishi Heavy Industries, Ltd.

    发明人： AOI, Tatsufumi ,  TSUMURA, Yoichiro ,  KUROSAWA, Kiyoshi ,  KIKUCHIHARA, Yutaka

    IPC分类号： G01R15/24

    CPC分类号： G01R15/246 ,  G01R29/0842

    摘要： This lightning current measuring device (10) is provided with: a polarized light separation element (18) which separates light outputted from a sensor fiber (14) into a horizontal component and a vertical component which have orthogonal planes of polarization, a Faraday rotation angle calculation unit (46A) which calculates the Faraday rotation angle by arc-sine processing of the digitized signal of the difference between the horizontal component and the vertical component converted to a signal by photo-electric conversion after separation by means of the polarized light separation element (18), amplifiers (42x, 42y) which amplify the horizontal component and the vertical component converted to a signal by photoelectric conversion after separation by means of the polarized light separation element (18), a Faraday rotation angle calculating unit (46B) which calculates the Faraday rotation angle on the basis of the digitized signal of the difference between the amplified horizontal component and vertical component, and current value conversion units (48A, 48B) which convert the current value on the basis of the calculated Faraday rotation angle. By this means, this lightning current measuring device (10) is able to calculate lightning currents in which the DC-component has a high dynamic range, including large lightning currents and small lightning currents.

    摘要翻译： 该雷电流测量装置（10）设置有：将从传感器光纤（14）输出的光分离成水平分量的偏振光分离元件（18）和具有正交正交平面的垂直分量，法拉第旋转角 计算单元（46A），其通过偏振光分离元件在分离之后通过光电转换而在水平分量和被转换成信号的垂直分量之间的数字化信号的电弧正弦处理中计算法拉第旋转角度 （18），通过偏振光分离元件（18）分离后通过光电转换将水平分量和垂直分量放大成信号的放大器（42x，42y），法拉第旋转角度计算单元（46B） 根据放大水平组合之间的差值的数字化信号计算法拉第旋转角度 零和垂直分量，以及基于所计算的法拉第旋转角度转换当前值的电流值转换单元（48A，48B）。 通过这种方式，雷电流测量装置（10）能够计算出直流分量具有高动态范围的雷电流，包括大的雷电流和小的雷电流。