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    Strain detector
    3.
    发明授权
    Strain detector 失效
    应变检测器

    公开(公告)号：US5165286A

    公开(公告)日：1992-11-24

    申请号：US720991

    申请日：1991-06-27

    申请人： Tiyo Hamamura ,  Keiitiro Kobayashi ,  Hideo Ikeda ,  Katsuhiko Honda ,  Yoshiyasu Ogata ,  Naoki Yagi

    发明人： Tiyo Hamamura ,  Keiitiro Kobayashi ,  Hideo Ikeda ,  Katsuhiko Honda ,  Yoshiyasu Ogata ,  Naoki Yagi

    IPC分类号： G01L3/10

    CPC分类号： G01L3/102

    摘要： A strain detector in which a pair of magnetic layer patterns (5, 6) made of a magnetically permeable soft magnetic material are attached to a driven shaft (1) and a pair of detection coils (8, 9) are disposed to surround the respective magnetic layers for detecting a change in magnetic permeability of the magnetic layers which is caused when an external force is applied to the driven shaft. A magnetic yoke (15 or 16) is disposed around each of the detection coils (8 or 9) for promoting the passage of the magnetic flux therethrough, thereby decreasing flux leakage. The magnetic yokes (15, 16) each comprises an axially extending tubular member (15a) and radially inward outer and inner flanges (15d, 15e) extending from axially outer and inner ends of the tubular member, respectively. The magnetic yokes each may be made of a compacted core material containing magnetic powder and binder or assembled from a plurality of parts. A highly electrically-conductive, non-magnetic material (23) may be disposed directly between the inner ends (21b ) of the tubular member (21a) of the magnetic yokes (21) and the detection coils (8, 9) for magnetically isolating them without the need for any inner flange while allowing a compact structure.

    摘要翻译： 一种应变检测器，其中将由导磁软磁材料制成的一对磁性层图案（5,6）附接到从动轴（1），并且一对检测线圈（8,9）被设置为围绕相应的 用于检测当外力对从动轴施加时引起的磁性层的磁导率变化的磁性层。 在每个检测线圈（8或9）周围设置磁轭（15或16），用于促进磁通量的通过，从而降低磁通泄漏。 磁轭（15,16）各自包括轴向延伸的管状构件（15a）和分别从管状构件的轴向外端和内端延伸的径向向内的外凸缘和内凸缘（15d，15e）。 磁轭各自可以由包含磁性粉末和粘合剂的压实芯材制成，或者由多个部件组装。 高度导电的非磁性材料（23）可以直接设置在磁轭（21）的管状构件（21a）的内端（21b）和用于磁隔离的检测线圈（8,9）之间 它们不需要任何内部法兰，同时允许紧凑的结构。