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    • 6. 发明授权
    • High-precision vortex flow meter
    • 高精度涡流流量计
    • US07487686B2
    • 2009-02-10
    • US11790702
    • 2007-04-27
    • An-Bang WangMing-Hsun WuYi-Hua WangI-Chun LinChia-Chih ChenShiming Lin
    • An-Bang WangMing-Hsun WuYi-Hua WangI-Chun LinChia-Chih ChenShiming Lin
    • G01F1/32
    • G01F1/3218G01F1/3209G01F15/024G01F25/0007
    • A high-precision vortex flow meter includes a blunt body having a predetermined dimension and being arranged inside a fluid channel to serve as a vortex shedder. The vortex flow meter also includes a temperature detecting device for detecting the vortex shedder temperature and a temperature control element for adjusting the vortex shedder temperature. A frequency measuring device is arranged in the downstream section of the blunt body for detecting the vortex shedding frequency. From the measured temperatures of the upstream fluid flow and that of the blunt body, an effective temperature and a temperature ratio are calculated. The kinematic viscosity of the fluid is looked up from database. By using the relationship between the Strouhal number and Reynolds number, the fluid flow rate is calculated. By employing different blunt body temperature, the measurement range of the flow meter can be broadly extended.
    • 高精度涡流流量计包括具有预定尺寸的钝体并且布置在流体通道内用作涡流脱落器。 涡流流量计还包括用于检测涡流脱落器温度的温度检测装置和用于调节涡流脱落器温度的温度控制元件。 在钝体的下游部分设置有频率测量装置,用于检测涡流脱落频率。 从测量的上游流体的温度和钝体的温度,计算有效的温度和温度比。 从数据库中查找流体的运动粘度。 通过使用Strouhal数和雷诺数之间的关系,计算流体流量。 通过采用不同的体温,可以大幅度地扩展流量计的测量范围。