| 摘要 |
FIELD: electricity. ^ SUBSTANCE: magnetic field of an electromagnetic flow metre, having a pipe (1) of a non-magnetic material (stainless steel), to external surface of which there are two electrodes (2) welded, is converted into electric voltage with the help of an induction coil placed into the pipe channel (1). Electric voltage produced at output terminals of the inductance coil is integrated, and a conversion ratio Kf of the flow metre is identified. At the same time current I is passed through electrodes, which is equal to I0 current by frequency and phase that supplies the flow metre inductor, and by value it is determined with an expression where D - a diameter of the pipe channel (1), Rem - a magnetic Reynolds number, R - electric resistance of an empty pipe between electrodes, 0 - magnetic permeability of a liquid metal, â - electroconductivity of a liquid metal. ^ EFFECT: invention expands the range of simulation technique of electric flow metres, which ensures the possibility of calibration at modes that correspond to high magnetic Reynolds numbers. ^ 1 dwg |
