Level and slope control for surfacing machines
    62.
    发明授权
    Level and slope control for surfacing machines 失效
    表面机械的水平和坡度控制

    公开(公告)号:US3554291A

    公开(公告)日:1971-01-12

    申请号:US3554291D

    申请日:1967-11-08

    IPC分类号: E02F3/84 E02F3/85

    CPC分类号: E02F3/847

    摘要: A level and slope control for road graders and similar surfacing machines is described in which one or more very narrow electromagnetic beams are projected along the path to be graded, and photoelectric sensors on the grading machine are utilized to receive and detect positional information from the light beams and to generate correction signals which both adjust the position of the surfacing blade and steer the machine in the desired direction.