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    • 50. 发明申请
    • FIBRE OPTIC SENSOR
    • 光纤传感器
    • WO1996007873A1
    • 1996-03-14
    • PCT/GB1995002099
    • 1995-09-07
    • COOKSON GROUP PLCBUTCHER, Steven, JohnHOBBY, James, David
    • COOKSON GROUP PLC
    • G01D05/34
    • G01R15/248G01D5/344G02F1/0134
    • A sensor assembly (1) comprises an optical fibre (4) and a transducer (23) arranged to apply transverse strain to a localised portion (24) of the fibre. Birefringence effects induced by the fibre strain are remotely sensed to obtain a signal representative of the transducer input which in turn is connected to a current sensing coil (34) thereby enabling electric current in a conductor (32) to be remotely sensed. The fibre is a metal coated fibre having a metallic jacket (19) enclosing a silica core and doped silica cladding layer. Damage to the fibre and the effects of creep are thereby avoided. The resulting sensor is particularly suited to the measurement of high currents in power distribution systems.
    • 传感器组件(1)包括光纤(4)和换能器(23),所述换能器被布置成对纤维的局部部分(24)施加横向应变。 远程地感测由光纤应变引起的双折射效应,以获得表示换能器输入的信号,该信号又连接到电流感测线圈(34),从而使导体(32)中的电流能够被远程感测。 纤维是具有包围二氧化硅芯和掺杂的二氧化硅包层的金属护套(19)的金属涂覆的纤维。 从而避免了纤维的损伤和蠕变的影响。 所得到的传感器特别适用于测量配电系统中的高电流。