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    • 4. 发明授权
    • Relative-rotational-position detection apparatus
    • 相对旋转位置检测装置
    • US06823745B2
    • 2004-11-30
    • US10430146
    • 2003-05-06
    • Atsutoshi GotoKazuya SakamotoHiroshi Sakamoto
    • Atsutoshi GotoKazuya SakamotoHiroshi Sakamoto
    • G01L310
    • G01L5/221G01L3/105
    • An outer cylindrical section is rotatable with a first shaft. Magnetic shielding portions are formed of a magnetic shielding or antimagnetic substance and arranged on a surface of a nonmagnetic and nonconductive cylindrical base. The magnetic shielding portions are spaced apart from each other by a predetermined interval in a circumferential direction of the cylindrical base so that non-magnetically-shielding portions are formed between the magnetic shielding portions. A plurality of coils are provided on a periphery of the outer cylindrical section and excitable by a predetermined A.C. signal. An inner cylindrical section is inserted in the outer cylindrical section and rotatable with a second shaft. The inner cylindrical section includes magnetic portions each provided to present a different characteristic with respect to an arrangement of the plurality of coils. Degree of overlap between the non-magnetically-shielding portions of the outer cylindrical section and the magnetic portions of the inner cylindrical section varies in response to a variation in the relative rotational position between the first shaft and the second shaft, and each of the coils presents impedance corresponding to the degree of overlap.
    • 外圆柱形部分可随着第一轴转动。 磁屏蔽部分由磁屏蔽或防磁物质形成,并布置在非磁性和非导电圆柱形基底的表面上。 磁屏蔽部在圆筒形基座的圆周方向上彼此隔开预定的间隔,从而在磁屏蔽部之间形成非磁屏蔽部。 多个线圈设置在外圆筒形部分的周边上并且可由预定的交流信号激发。 内圆柱形部分插入外圆柱形部分中,并与第二轴一起旋转。 内圆柱形部分包括各自设置成相对于多个线圈的布置呈现不同特性的磁性部分。 外筒部的非磁屏蔽部与内筒部的磁性部之间的重叠度随着第一轴和第二轴之间的相对旋转位置的变化而变化,并且每个线圈 呈现与重叠程度相对应的阻抗。
    • 5. 发明授权
    • Self-induction-type position detector device for detecting object position
    • 用于检测物体位置的自感式位置检测装置
    • US06707291B2
    • 2004-03-16
    • US10334384
    • 2002-12-31
    • Atsutoshi GotoKazuya SakamotoHiroshi Sakamoto
    • Atsutoshi GotoKazuya SakamotoHiroshi Sakamoto
    • G01B714
    • G01D5/2013G01D3/0365G01D5/202
    • Single coil to be excited by a predetermined A.C. signal is provided, with no secondary coil being provided. Magnetism-responsive member is movable relative to the coil so that a self-inductance of the coil progressively increases or decreases in response to displacement of an object to be detected within a predetermined range and a voltage of the coil corresponding to the self-inductance is produced. Predetermined reference voltage is generated and subjected to analog operations with the coil output voltage, to thereby generate first and second A.C. outputs having, as amplitude coefficients, first and second cyclic amplitude functions correlated to the position to be detected. The position is detected on the basis of the phase component of the amplitude coefficient functions. Combination of two coils and one reference voltage may be employed.
    • 提供要由预定交流信号激发的单线圈,没有提供次级线圈。 磁性响应元件相对于线圈是可移动的,使得线圈的自感随着被测物体在预定范围内的位移而逐渐增大或减小,并且与自感相对应的线圈电压为 生产。 产生预定的参考电压并对线圈输出电压进行模拟操作,从而产生具有与要检测的位置相关的第一和第二循环振幅函数作为幅度系数的第一和第二A.C.输出。 基于振幅系数函数的相位分量来检测位置。 可以组合两个线圈和一个参考电压。
    • 6. 发明授权
    • Position detection data generating method and apparatus based on phase shift principle
    • 基于相移原理的位置检测数据生成方法和装置
    • US06571194B2
    • 2003-05-27
    • US10254404
    • 2002-09-25
    • Atsutoshi GotoKazuya SakamotoNobuyuki Akatsu
    • Atsutoshi GotoKazuya SakamotoNobuyuki Akatsu
    • G01C1700
    • G01D5/204
    • The present invention is directed to a position detection method and apparatus whereby a first A.C. output signal having an electric phase angle shifted in a positive direction in accordance with a position-to-be-detected is produced along with a second A.C. output signal having an electric phase angle shifted in a negative direction. First and second detection data are then generated by detecting respective phase differences of the first and second A.C. output signals from a predetermined reference phase. The first and second predicted values are provided on the bases of at least two successive samples of the first and second detection data, respectively. The first and second predicted values are then modified to provide a standard predicted value for correcting any nonlinear error resulting from the Doppler effect. Using this standard predicted value, predictive interpolation is performed on the first and second detection data sequentially with the passage of time to provide first and second interpolated data.
    • 本发明涉及一种位置检测方法和装置,其中根据待检测位置在正方向上偏移的电相位角的第一AC输出信号与具有 电相角沿负方向移动。 然后通过检测来自预定参考相位的第一和第二交流输出信号的相位差产生第一和第二检测数据。 第一和第二预测值分别基于第一和第二检测数据的至少两个连续采样来提供。 然后修改第一和第二预测值以提供用于校正由多普勒效应产生的任何非线性误差的标准预测值。 使用该标准预测值,随着时间的推移顺序地对第一和第二检测数据执行预测插值,以提供第一和第二内插数据。