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    • 1. 发明授权
    • Compound rotary encoder for detecting the rotation angle and the number
of rotations of a rotor shaft
    • 用于检测转子轴的旋转角度和转数的复合式旋转编码器
    • US4945231A
    • 1990-07-31
    • US360191
    • 1989-06-01
    • Hideshi OhyaTakao MiyataniKeiji KawamuraYasutomo Kawabata
    • Hideshi OhyaTakao MiyataniKeiji KawamuraYasutomo Kawabata
    • G01D5/347
    • G01D5/34792
    • In the compound rotary encoder of this invention, an absolute signal representing the upper m bits of a rotation angle signal, and an icreametal signal used for detecting the lower bits of the rotation angle signal are detected to obtain more detailed rotation angle information. Moreover, the rotation angle obtained by counting the increamental signal closely matches that obtained from the absolute signal, assuring the detection of the rotation angle with high resolution and precision. Since a rotating disk has only m bits of absolute code pattern, the rotary encoder can be small. This permits the absolute code pattern to have greater diametrical width so that a large output of the absolute signal can be stably obtained. On the other hand, the number of rotations can be obtained by counting and compensating a standard position signals. Since the rotary disk has the patterns both for detecting the standard position signal and for detecting the rotation angle, this too allows the rotary encoder to be small.
    • 在本发明的复合式旋转编码器中,检测表示旋转角度信号的上位m位的绝对信号,以及用于检测旋转角度信号的低位的前置信号,得到更详细的旋转角度信息。 此外,通过对内切信号进行计数而获得的旋转角度与从绝对信号获得的旋转角度紧密匹配,确保以高分辨率和精度检测旋转角度。 由于旋转盘只有绝对代码模式的m位,所以旋转编码器可以很小。 这允许绝对代码图形具有更大的直径宽度,从而可以稳定地获得绝对信号的大输出。 另一方面,可以通过对标准位置信号进行计数和补偿来获得转数。 由于旋转盘具有用于检测标准位置信号和检测旋转角度的图案,因此也允许旋转编码器小。