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    • 1. 发明授权
    • Device for driving stepper motor type measuring instrument
    • 驱动步进电机式测量仪器
    • US6034501A
    • 2000-03-07
    • US973422
    • 1997-12-08
    • Kouichi SatoYouichi Simazu
    • Kouichi SatoYouichi Simazu
    • G01P1/08G01D7/00G01D13/22G01P3/487G01P3/489G01R7/06H02P8/00H02P8/22H02K37/00
    • G01P3/489G01P1/07G01P3/487G01R7/06H02P8/22
    • A measure obtained by a counting circuit (2) is converted by a processing circuit (3) to an indication angle signal at a predetermined conversion cycle. A smoothing circuit (4) comprises a division circuit (11) for calculating the difference between the previous indication angle data .theta..sub.0 and the present indication angle data .theta..sub.1 which is outputted after the conversion cycle T and has changed, and sequentially accumulating the angle data corresponding to T/n (where n is an integer of 2 or more) shorter than the conversion cycle T at a division cycle T/n and a voltage memory (12) for converting and outputting a two-phase driving signal for driving a stepper motor type measuring instrument (6) on the basis of the indication angle data .theta..sub.i outputted from the division circuit (11) every division cycle T/n. A voltage signal is generated through an output circuit (5) for converting the signal to a voltage signal to be applied to a two-phase excitation coil of a stepper motor. This voltage signal drives the stepper type motor measuring instrument (6) and rotates a pointer (9) fixed to the end of a driving shaft at angle indication corresponding to a scale (8) of a dial (7).
    • PCT No.PCT / JP97 / 01279 Sec。 371 1997年12月8日第 102(e)1997年12月8日PCT PCT 1997年4月10日PCT公布。 出版物WO97 / 38285 日期1997年10月16日由计数电路(2)获得的测量由处理电路(3)以预定转换周期转换为指示角信号。 平滑电路(4)包括分割电路(11),用于计算在转换周期T之后输出的先前指示角度数据θ0和当前指示角度数据θ1之间的差异,并且依次累加角度 对应于分割周期T / n处的转换周期T的T / n(其中n是2以上的整数)的数据和用于转换和输出用于驱动的​​两相驱动信号的电压存储器(12) 步进电动机式测量仪器(6),基于每个分频周期T / n从分频电路(11)输出的指示角度数据θi。 通过输出电路(5)产生电压信号,用于将信号转换为施加到步进电机的两相励磁线圈的电压信号。 该电压信号驱动步进式电动机测量仪器(6),并以与表盘(7)的刻度(8)相对应的角度指示旋转固定在驱动轴端部的指针(9)。