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    • 2. 发明授权
    • Photoelectric dimension measuring system
    • 光电尺寸测量系统
    • US4555633A
    • 1985-11-26
    • US404422
    • 1982-08-02
    • Mats Bjorkelund
    • Mats Bjorkelund
    • G01B11/10G01V8/20G01N21/86
    • G01B11/105G01V8/20
    • A method and a device for indicating the presence of an object in a measuring zone (E), and for objects having a measurable cross-sectional shape, also the extent of the object along a reference line (R). The method and device makes use of lines (A, B) of radiation emitters (11) and radiation receivers (12) located on opposite sides of the object, the receivers being fewer than the emitters. Created between the emitters and the receivers is a network of intersecting radiation paths in the measuring zone. An electronic unit (20) establishes which intersections (P.sub.1) of the radiation paths are screened-off by the object. The invention is useful for indicating the presence of objects with arbitrary cross-section when it is desired to determine a lower limit for the size an indicated object shall have, and to determine a diameter measurement, in particular in the saw mill industry.
    • 一种用于指示测量区域(E)中存在物体的方法和装置,以及用于具有可测量横截面形状的物体,以及沿着参考线(R)的物体的程度。 该方法和装置利用位于物体相对侧的辐射发射器(11)和辐射接收器(12)的线(A,B),接收器比发射器少。 在发射器和接收器之间创建的是测量区域中相交的辐射路径的网络。 电子单元(20)确定辐射路径的哪个交点(P1)被对象屏蔽掉。 当希望确定所指定的物体的尺寸的下限并且确定直径测量时,特别是在锯木厂行业中,本发明可用于指示具有任意横截面的物体的存在。