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    • 8. 发明授权
    • Rotational angle detecting apparatus
    • 旋转角度检测装置
    • US4267470A
    • 1981-05-12
    • US15651
    • 1979-02-27
    • Kazuhiko KawakamiNoboru Sugiura
    • Kazuhiko KawakamiNoboru Sugiura
    • G01P3/44F02B75/02F02P7/067G01D5/244G01D5/245H03K5/26
    • F02P7/0675G01D5/24404F02B2075/027
    • A rotational angle detecting apparatus comprises a rotary disc having first protrusions for an angle signal provided along the outer periphery of the disc and second protrusion for a reference signal arranged adjacent to the first protrusions in the thickness direction of the disc. A pick-up assembly is disposed to face the second protrusion to sense the rotationl position thereof. The sensed signal including noise components due to a magnetic coupling between the pick-up assembly and the first protrusions is subject to an integration and then applied to a level detector to generate a first pulse signal which occurs only during the integration signal being greater than a predetermined threshold level. On the other hand, a second pulse signal is produced by shaping the sensed signal. The first and second pulse signals are applied to an AND logic gate from which an output pulse is obtained in synchronism with the rotation of the disc.
    • 旋转角检测装置包括旋转盘,该旋转盘具有用于沿盘的外周设置的角度信号的第一突起和用于在盘的厚度方向上与第一突起相邻布置的参考信号的第二突起。 拾取组件设置成面对第二突起以感测其旋转位置。 包括由拾取组件和第一突起之间的磁耦合引起的噪声分量的感测信号经受积分,然后被施加到电平检测器,以产生第一脉冲信号,其仅在积分信号大于 预定阈值水平。 另一方面,通过对感测信号进行整形来产生第二脉冲信号。 第一和第二脉冲信号被施加到AND逻辑门,与该盘的旋转同步获得输出脉冲。