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    • 5. 发明申请
    • Displacement measuring device
    • 位移测量装置
    • US20090091312A1
    • 2009-04-09
    • US12232856
    • 2008-09-25
    • Tomohiro ItoTakamitsu KubotaYoshiyuki Kono
    • Tomohiro ItoTakamitsu KubotaYoshiyuki Kono
    • G01B7/14
    • G01D5/147
    • A displacement measuring device includes a stationary magnetic member for providing an accommodation space and a first and second magnetic circuits, a movable magnetic member disposed in the accommodation space to move in its longitudinal direction, a magnetic sensor for sensing magnetic flux flowing in the first and second magnetic circuits. The stationary member includes a sensor supporting member disposed in line with an axis of symmetry, a pair of yoke members axisymmetrically disposed at opposite sides of the sensor supporting member, a pair of permanent magnets each of which is disposed between one of the yoke members and the sensor supporting member. The permanent magnets are polarized so that magnetic flux flows in one of the magnetic circuits opposite in direction to magnetic flux flowing in the other magnetic circuit. The magnetic sensor is disposed on the sensor supporting member to confront the moving magnetic member at a first air gap. Each of the yoke members has a projection extending in parallel with the longitudinal direction of the movable magnetic member at a second air gap. Therefore, magnetic permeance of the first and second magnetic circuits changes when the moving magnetic member moves in the longitudinal direction thereof.
    • 位移测量装置包括用于提供容纳空间的固定磁性构件和第一和第二磁路,设置在容纳空间中的可移动磁性构件沿其纵向方向移动;磁传感器,用于感测在第一和第二磁流体中流动的磁通; 第二磁路。 固定构件包括与对称轴线对齐设置的传感器支撑构件,轴对称地设置在传感器支撑构件的相对侧的一对轭构件,一对永磁体,每个永磁体设置在一个轭构件和 传感器支撑构件。 永磁体被极化,使得磁通量中的一个磁路在与另一个磁路中流动的磁通方向相反的方向上流动。 磁传感器设置在传感器支撑构件上,以在第一气隙处面对移动的磁性构件。 每个轭构件具有在第二气隙处与可动磁性构件的纵向方向平行延伸的突起。 因此,当移动磁性部件沿其长度方向移动时,第一和第二磁路的磁导度改变。
    • 7. 发明授权
    • Angular position measuring device
    • 角位置测量装置
    • US06476600B2
    • 2002-11-05
    • US09769517
    • 2001-01-26
    • Yoshiyuki KonoTakashi HamaokaTakamitsu KubotaTakuya FukitsukeTetsuya Aoki
    • Yoshiyuki KonoTakashi HamaokaTakamitsu KubotaTakuya FukitsukeTetsuya Aoki
    • G01B714
    • G01D5/145
    • A compact and high-accuracy angular position measuring device is provided which has magnets installed in a rotor core and a magnetic sensor installed in a stator core. The magnetic sensor produces an output indicative of an angular position of the rotor core as a function of a change in density of magnetic flux produced by the magnets. The magnets are so arranged in the rotor core that the same poles are opposed magnetically to produce a repellent force in magnetic fields of the magnets, thereby causing the magnetic flux to go to the magnetic sensor through the rotor core. This eliminates the need for an air gap between the stator core and the poles of the magnets which is formed in a conventional device, thus allowing the device to be reduced in size and an error in output of the device to be decreased.
    • 提供一种紧凑且高精度的角位置测量装置,其具有安装在转子芯中的磁体和安装在定子芯中的磁传感器。 磁传感器产生表示作为磁体产生的磁通密度变化的函数的转子芯的角位置的输出。 磁体设置在转子芯中,使得相同的磁极与磁体相反地产生驱动力,从而使得磁通量通过转子磁芯进入磁传感器。 这消除了在常规装置中形成的定子铁芯和磁体的极之间的空气间隙的需要,从而允许装置的尺寸减小并且装置的输出误差减小。