Method and apparatus for total and individual flow measurement of a single-or multi-phase medium

An apparatus for a total and individual flow measurement of a multi-phase gas/liquid medium, said apparatus comprising:

• a hollow pendulum having an inlet, a midpoint, and an outlet, the inlet and the outlet being fixed in place, said pendulum having a first portion between the inlet and the midpoint and a second portion between the midpoint and the outlet, said portions being symmetrical about a line forming an axis of symmetry of said pendulum, said line going through said midpoint and a midway point between the inlet and the outlet of said pendulum;
• a first pair of electromagnets and a second pair of electromagnets for causing non-fading oscillations of said pendulum, said medium flowing through said pendulum from the inlet to the outlet causing Coriolis forces to disturb said oscillations, said first pair of electromagnets positioned about the first portion of said pendulum, said second pair of electromagnets respectively positioned about the second portion of said pendulum, said first and second pairs of electromagnets positioned symmetrically about the axis of symmetry of said pendulum, said first pair of electromagnets having a first electromagnet and a second electromagnet positioned opposite said first electromagnet about said pendulum and forming a closed electromechanical loop with said first portion, said second pair of electromagnets having respectively a third electromagnet and a fourth electromagnet positioned opposite said third electromagnet about said pendulum and forming a closed electromechanical loop with said second portion;
• and
• a control unit for said first and second pairs of electromagnets, said unit individually adjusting electrical currents supplied to said first and second pairs of electromagnets to compensate for oscillation disturbances caused by said Coriolis forces, said unit computing the total flow of the medium through said pendulum and the flow rates of all components of the medium based on the difference in electrical currents supplied to said first and second pairs of electromagnets and the change in frequency of said pendulum oscillations caused by the flowing medium.