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    Flow velocity measuring apparatus and methods using sensors for measuring larger and smaller flow quantities
    1.
    发明授权
    Flow velocity measuring apparatus and methods using sensors for measuring larger and smaller flow quantities 失效
    使用传感器测量更大和更小流量的流速测量装置和方法

    公开(公告)号：US06446503B1

    公开(公告)日：2002-09-10

    申请号：US09577882

    申请日：2000-05-25

    申请人： Kazumitsu Nukui ,  Hideo Kato ,  Ken Tashiro ,  Mitunori Komaki ,  Masahiko Matushita ,  Kazuhiro Yamada

    发明人： Kazumitsu Nukui ,  Hideo Kato ,  Ken Tashiro ,  Mitunori Komaki ,  Masahiko Matushita ,  Kazuhiro Yamada

    IPC分类号： G01F700

    CPC分类号： G01F7/00

    摘要： A flowmeter capable of measuring an accurate quantity of flow over a wide range of the quantity of flow. A measurement zone (15) for smaller quantity of flow and a measurement zone (16) for larger quantity of flow are determined inside a flow path (13) of a pipe (10). Regulating strainers (14) for regulating the flow of a gas (20) are disposed inside the measurement zone (15) for smaller quantity of flow by dividing the flow path (13) into a plurality of narrower flow paths (14A). A mean flow velocity of the gas (20) flowing through each of a plurality of narrower flow paths (14A) becomes substantially equal. A part of the gas (20) reaches nozzles (22a, 22b) erected across flow velocity sensors (15a, 15b) for smaller quantity of flow and is accelerated by the operation of these nozzles. The flow velocity sensors (15a, 15b) inside the measurement zone (15) for smaller quantity of flow output signals corresponding to the flow velocity of the gas (20) passed through the narrower flow path (14a) and accelerated by the nozzles (22a, 22b) in the range of the smaller quantity of flow. Flow velocity sensors (16a, 16b) for larger quantity of flow in the measurement zone (16) for lager quantity of flow output signals corresponding to the flow velocity of the gas (20) in the range of the larger quantity of flow.

    摘要翻译： 一种流量计，能够在宽的流量范围内测量准确的流量。 在管道（10）的流路（13）内确定用于较小流量的测量区域（15）和用于较大流量的测量区域（16）。 用于调节气体（20）流动的调节过滤器（14）通过将流动路径（13）分成多个更窄的流动路径（14A）而设置在测量区域15的内部，用于较小的流量。 流过多个较窄流路（14A）中的每一个的气体（20）的平均流速基本相等。 气体（20）的一部分到达用于较少流量的跨越流速传感器（15a，15b）竖立的喷嘴（22a，22b），并且通过这些喷嘴的操作而加速。 用于对应于通过较窄流路（14a）并被喷嘴（22a）加速的气体（20）的流速的较小量的流量输出信号的测量区域（15）内部的流速传感器（15a，15b） ，22b）在较小流量的范围内。 用于在大量流量范围内对应于气体（20）的流速的较大量的流量输出信号的用于测量区域（16）中较大流量的流速传感器（16a，16b）。