公开(公告)号：US06435036B1

公开(公告)日：2002-08-20

申请号：US09904545

申请日：2001-07-16

申请人： Toshisuke Sakai ,  Toshihiko Matsuda ,  Kazuyuki Kasahara ,  Yasumasa Fukami ,  Takashi Ehara ,  Motohiko Matsuguma ,  Yasuhiko Ezaki ,  Masashi Yamaguchi

发明人： Toshisuke Sakai ,  Toshihiko Matsuda ,  Kazuyuki Kasahara ,  Yasumasa Fukami ,  Takashi Ehara ,  Motohiko Matsuguma ,  Yasuhiko Ezaki ,  Masashi Yamaguchi

IPC分类号： G01F132

CPC分类号： G01F1/329 ,  G01F1/3245

摘要： A vortex flow meter includes a measuring tube in which a fluid is carried, a vortex generator provided in the measuring tube for developing a Karman vortex in the fluid, a magnetic field generator generating a magnetic field across the measuring tube downstream of the vortex generator, a pair of electromotive force measuring electrodes provided downstream of the vortex generator for measuring an electromotive force generated by the Karman vortex passing across the magnetic field, a pair of reference electrodes provided at locations upstream and downstream of the electromotive force measuring electrodes, respectively, for measuring a potential at each location, and a detector circuit electrically connected to the electromotive force measuring electrodes and the reference electrodes for calculating the flow of the fluid from the electromotive force and the potential measured by the reference electrodes. The flow is calculated by subtracting the potential difference of the reference potential measuring electrodes from the electromotive force measured by the electromotive force measuring electrodes. This allows the flow meter to have an increased measuring range, meet a wide range of flow conditions, have a simple construction, and have measurement accuracy.

摘要翻译： 涡流流量计包括其中载有流体的测量管，设置在测量管中用于在流体中显影卡曼涡流的涡流发生器，产生涡流发生器下游的测量管的磁场的磁场发生器， 设置在涡流发生器下游的一对电动势测量电极，用于测量由穿过磁场的卡门涡流产生的电动势，分别设置在电动势测量电极的上游和下游的一对参考电极，用于 测量每个位置处的电位，以及电连接到电动势测量电极和参考电极的检测器电路，用于从电动势计算流体的流量和由参考电极测量的电位。 通过从由电动势测量电极测量的电动势中减去参考电位测量电极的电位差来计算流量。 这允许流量计具有增加的测量范围，满足宽范围的流动条件，具有简单的结构，并且具有测量精度。