| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary encoder device capable of driving measurement of a rotator or driving control based on measurement, and detection or correction control of mounting eccentricity of a rotary encoder. SOLUTION: First of all, in (150), an analog output from the rotary encoder is subjected to A/D conversion in (151), and in (152), (153) rotation pulse signal component extraction outputted in each pattern of P<SB>1</SB>, P<SB>2</SB>, etc., P<SB>72</SB>or the like and (154) eccentric signal component extraction are performed. Specifically, the amplitude and the phase of a periodical fluctuation of a Sin function of H/(H+L) acquired from a pattern of a rotary encoder one circuit portion (P<SB>1</SB>, P<SB>2</SB>, etc., P<SB>72</SB>) of 'an eccentricity amount phase detection means for detecting the mounting eccentricity amount and the eccentricity phase of the rotary encoder to a rotation axis core corresponding to the ratio of each pulse width of H and L levels to a rotation angle in the rotary encoder' caused by eccentricity are determined, and fluctuation components thereof are separated (filtered), to thereby determine. COPYRIGHT: (C)2007,JPO&INPIT |
