公开(公告)号：US5261283A

公开(公告)日：1993-11-16

申请号：US816750

申请日：1992-01-02

Applicant: Gert-Inge Bertinsson ,  Leif Mattisson ,  Goran Ohlsson

Inventor： Gert-Inge Bertinsson ,  Leif Mattisson ,  Goran Ohlsson

IPC: G01F1/58 ,  G01F15/12

CPC classification number: G01F15/12 ,  G01F1/584

Abstract: Apparatus for measuring fluid flow through a conduit including a measuring electrode and a ground electrode disposed in the conduit and connected to form an electrolytic cell, so that a voltage can be applied between the electrodes in order to cleanse deposits from the measuring electrode, and gases generated during the cleansing step can then be dissipated. Methods for measuring the fluid flow in such a manner are also described herein.

公开(公告)号：US20060096389A1

公开(公告)日：2006-05-11

申请号：US10544671

申请日：2004-01-26

Applicant: Hans Hallstadius ,  Goran Ohlsson ,  Sven Gustafson ,  Bengt Jonasson ,  Gert-Inge Bertinsson

Inventor： Hans Hallstadius ,  Goran Ohlsson ,  Sven Gustafson ,  Bengt Jonasson ,  Gert-Inge Bertinsson

IPC: G01F1/58

CPC classification number: A61M1/16 ,  A61M1/1647 ,  A61M1/341 ,  G01F1/588 ,  G01F1/60

Abstract: The invention relates to measurement of a fluid flow, wherein a flow rate component of the fluid is measured along a selected direction. A magnetic field whose polarity varies over time is applied to the fluid, which presumed to contain electrically charged elements. First and second sensor electrodes (120, 121) are arranged to be wetted by the flowing fluid. The electrodes (120, 121) are spaced apart from one another along a line being substantially perpendicular both to the selected flow direction and a magnetic axis of the magnetic field. A DC-level drift of the sensor electrodes (120, 121) is prevented by supplying a control current (Ictrl-0; Ictrl-1) each of the sensor electrode (120, 121), which has such sign and magnitude that a direct-current voltage level at the sensor electrodes (120, 121) relative a reference potential is controlled towards a predetermined voltage (DCset).

Abstract translation: 本发明涉及流体流动的测量，其中沿所选方向测量流体的流速分量。 极性随时间变化的磁场被施加到被认为包含带电元件的流体。 第一和第二传感器电极（120,121）布置成被流动的流体润湿。 电极（120,121）沿着基本上垂直于选定的流动方向和磁场的磁轴的线彼此间隔开。 传感器电极（120,121）的直流电平漂移通过提供每个传感器的控制电流（I ctrl-0; I> ctrl-1 < 电极（120,121）具有相对于参考电位的传感器电极（120,121）的直流电压电平被控制到预定电压（DC SET）的符号和大小， 。