1.
    发明专利
    未知

    公开(公告)号:FR2433103A1

    公开(公告)日:1980-03-07

    申请号:FR7920164

    申请日:1979-08-07

    Applicant: HITACHI LTD

    Abstract: In a detecting apparatus for indicating engine revolutions or vehicle speed, a counter is provided to count up, for a predetermined period of time, the number of pulses produced by an angle sensor. To improve the accuracy of the measurement, the time width during which the pulses are counted can be varied in accordance with a rotational speed of the engine. In this way, a larger measurement time period is provided at lower speeds than at higher speeds.

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