Coriolis type mass flow meter

Details Coriolis type mass flow meter Coriolis type mass flow meter

1994-09-16

1996-02-06

Noland, Thomas P.

Measuring and testing

Volume or rate of flow

Mass flow by imparting angular or transverse momentum to the...

7386137, G01F 178

Patent

active

054888700

ABSTRACT:
Measurement of a mass flow rate is accomplished by equalizing the output amplitude values of upstream and downstream sensors without causing a lowering of the mechanical Q of a vibration system. One of the upstream and downstream sensors includes a permanent magnet disposed on a side of a tube and an induction coil disposed on a side of a base, the output voltage amplitude of which is fixed. Another sensor includes a ferromagnetic member disposed on the side of the tube and an excitation coil and an induction coil disposed on the side of the base. The output voltage amplitude of the induction coil is controlled to be coincident with the output voltage amplitude of the induction coil by adjusting a DC current flowing through the excitation coil.

REFERENCES:
patent: 4747312 (1988-05-01), Herzel
patent: 4949583 (1990-08-01), Lang et al.
patent: 5218873 (1993-06-01), Lang
patent: 5365794 (1994-11-01), Hussain et al.
patent: 5373745 (1994-12-01), Cage

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