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    • 7. 发明公开
    • Self-induction-type stroke sensor
    • Hubsensor der selbstinduktiven Art
    • EP1081390A3
    • 2003-09-03
    • EP00118865.5
    • 2000-08-31
    • Amiteq Co., Ltd.SHIN CATERPILLAR MITSUBISHI LTD.
    • Goto, AtsutoshiSakamoto, KazuyaSakamoto, HiroshiTozawa, Shoji, c/o Shin Caterpillar Mitsubishi Ltd
    • F15B15/28G01D5/00
    • G01D5/2033F15B15/2853F15B15/2861
    • A sensor member (4) has one end supported in a cantilever fashion adjacent a predetermined end of a body (2) and has the other end extending into a space of the body, and includes a plurality of coil segments (LA - LB) that are excitable in a same phase by a predetermined A.C. signal and sequentially arranged along a direction of movement of a movable member (3). The movable member (3) has an inner space (5) to permit entry of the sensor member (4) into the movable member (3). Inner peripheral wall of the movable member defining the inner space includes a magnetism-responsive substance (11). Relative positions of the magnetism-responsive substance (11) and the coil segments (LA - LB) vary with a stroke position of the movable member (3), in response to which respective inductance of the coil segments are caused to vary in such a manner that during movement of the magnetism-responsive substance (11) from one end to the other of a particular one of the coil segments, a voltage across the particular coil segment is caused to progressively decrease or increase.
    • 传感器构件(4)的一端以与悬臂相对的方式相对于主体(2)的预定端支撑,并且另一端延伸到主体的空间中,并且包括多个线圈段(LA-LB),其中 通过预定的AC信号在同一相位可激励,并且沿着可移动部件(3)的移动方向依次布置。 可动构件(3)具有允许传感器构件(4)进入可动构件(3)的内部空间(5)。 限定内部空间的可动构件的内周壁包括磁响应物质(11)。 磁响应物质(11)和线圈段(LA-LB)的相对位置随着可移动构件(3)的行程位置而变化,响应于这样的线圈段的相应电感在这种变化中变化 在磁响应物质(11)从特定线圈段的一端移动到另一端的过程中,特定线圈段上的电压逐渐减小或增加。