Coriolis type mass flow meter

Details Coriolis type mass flow meter Coriolis type mass flow meter

G - Physics

01

F

G01F 1/84 (2006.01)

Patent

CA 2132554

ABSTRACT To realize high precision measurement of mass flow rate by equalizing the output amplitude values of upstream and downstream sensors without causing lowering of mechanical Q of the vibration system. One of the upstream and downstream sensors is comprised of a permanent magnet 2 disposed on the side of a tube 15 and an induction coil 75, disposed on the side of a base 3, the output voltage amplitude of which is fixed. Another sensor is comprised of a ferromagnetic member 72 disposed on the side of the tube 15 and a couple of an excitation coil 70 and an induction coil 71 disposed on the side of the base 3. The output voltage amplitude of the induction coil 71 is controlled to be coincident with the output voltage amplitude of the induction coil 75 by adjusting a DC current flowing through the excitation coil 70.

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