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    • 6. 发明授权
    • Airflow rate measuring apparatus of Karman vortex type
    • 卡曼涡型气流量测量仪
    • US4696193A
    • 1987-09-29
    • US804848
    • 1985-12-05
    • Sinzi NanbaKazuma MatsuiToru MizunoTukasa Goto
    • Sinzi NanbaKazuma MatsuiToru MizunoTukasa Goto
    • G01F1/32
    • G01F1/3209G01F1/3245
    • A columnar vortex generator is set in a duct communicating with an intake pipe of an engine, to extend across the airflow in the duct. A vortex sensor is arranged in a downstream surface of the vortex generator. The sensor generates a signal corresponding to the frequency of Karman vortexes generated at the downstream side of the vortex generator. A turbulence generator for generating a turbulent flow in that part of intake air flowing against the vortex generator is set at the upstream side of the vortex generator. The vortex generator consists of stationary and movable units. The movable unit is moved in accordance with elongation/contraction of a bellows so as to vary the typical dimension D of the surface of the vortex generator against which air flows.
    • 柱形涡流发生器设置在与发动机的进气管连通的管道中,以延伸穿过管道中的气流。 涡流传感器设置在涡流发生器的下游表面。 传感器产生对应于在涡流发生器的下游侧产生的卡门涡流的频率的信号。 在涡流发生器的上游侧设置有用于产生湍流的湍流发生器,该湍流在该涡流发生器流动的那部分进气中产生。 涡流发生器由固定和可动单元组成。 可移动单元根据波纹管的伸长/收缩而移动,以便改变涡流发生器的与空气流动的表面的典型尺寸D.