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    • 1. 发明公开
    • Absolute linear position detection device
    • 绝对线性位置检测装置
    • EP0212406A3
    • 1989-04-19
    • EP86110717.5
    • 1986-08-02
    • Kabushiki Kaisha S.G.
    • Wataru, IchikawaYuji, Matsuki
    • H03M1/22
    • F15B15/2861F15B15/2846H03M1/287
    • A first pattern (3a) which repeats change in the longitudinal direction with a predetermined pitch and a second pattern (3b) which changes in the longitudinal direction with a pitch which is different at least from that of the first pattern, both formed of a predetermined material, are disposed on a surface of a rod section (3). A detection head section (1,2) is porvided in proximity to the rod section, responds individually to the first pattern and the second pattern, changes its relation of correspondence to the repsective patterns in accordance with it linear position with respect to the rod section and produces output signals in accordance with the relation of correspondence to the respective patterns. In accordance with the output signals corresponding to the respective patterns, first and second absolute position data of different ranges whose one cycle is constituted of one pitch of the respective patterns can be obtained. By combining these absolute position data, linear position of the detection head section with respect to the rod section can be specified in an absolute value. By disposing the first and second patterns in a mixed state on a single rod section, the construction of the device can be simplified.
    • 3. 发明公开
    • Rotational position detection device
    • Einrichtung zum Erfassen der Drehlage。
    • EP0182322A1
    • 1986-05-28
    • EP85114579.7
    • 1985-11-16
    • Kabushiki Kaisha S.G.
    • Ichikawa, WataruMatsuki, YujiMaruyama, Takeo
    • G01P3/49G01D5/20
    • G01D5/225H02K29/12
    • The rotational position detection device comprises a stator section (1) including primary and secondary windings (W1, W2) and a rotor section (2) disposed in such a manner that it is capable of performing relative rotational displacement with respect to the stator section. A conductive substance portion (2b) is provided in the form of a predetermined pattern. The amount of flux passing through the conductive substance portion of the rotor section (2) changes in accordance with a relative rotational position of the rotor section with respect to the stator section (1) and therefore an eddy current flows through the conductive substance portion. Reluctance is caused to change by a loss due to this eddy current and a secondary output signal corresponding to the rotational position is produced in the windings of the stator section. The pattern of the conductive substance portion (2b) can be formed easily by using electro-plating or other surface processing technique. The rotor section (2) may be of a shape such that the rate of the reluctance change is enhanced by the combination of the magnetic substance portion (2a) and the conductive substance portion.
    • 旋转位置检测装置包括具有初级和次级绕组(W1,W2)的定子部分(1)和以能够相对于定子部分执行相对旋转位移的方式设置的转子部分(2)。 导电物质部分(2b)以预定图案的形式提供。 根据转子部相对于定子部(1)的相对旋转位置,通过转子部(2)的导电性物质部的磁通量变化,涡电流流过导电性物质部。 由于这种涡流引起的损耗导致磁阻变化,并且在定子部分的绕组中产生对应于旋转位置的次级输出信号。 通过使用电镀或其他表面处理技术,可以容易地形成导电物质部分(2b)的图案。 转子部分(2)可以是通过磁性物质部分(2a)和导电物质部分的组合来提高磁阻变化率的形状。