Mass flow meter

Details Mass flow meter Mass flow meter

2007-06-26

2007-06-26

Thompson, Jewel (Department: 2855)

Measuring and testing

Volume or rate of flow

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

Reexamination Certificate

active

10567288

ABSTRACT:
The invention relates to a mass flow meter for flowing media, which operates according to the Coriolis principle. At least one oscillator and at lest one sensor that detects Coriolis forces and/or oscillations based on Coriolis forces are mounted on a Coriolis measuring tube. As evaluation unit determines a measured flow valve from the measurement signal of the sensor. Means are provided which make it possible to detect zero flow in the measuring tube regardless of the detection of Coriolis forces and/or oscillations based on Coriolis forces and generate a corresponding measurement signal. Said means can comprise a sensor for measuring a flow according to a magnetic-inductive measuring method, the method for measuring the difference in propagation time or the Doppler method with the aid of noise signals, a differential pressure method, a calorimetric method, and/or a float-type measuring method, for example, whereby the problem or a measuring error caused by zero displacement is resolved in mass flow meters operating according to the Coriolis principle.

REFERENCES:
patent: 4852409 (1989-08-01), Herzl
patent: 5069075 (1991-12-01), Hansen et al.
patent: 5359881 (1994-11-01), Kalotay et al.
patent: 5996650 (1999-12-01), Phallen et al.
patent: 6327915 (2001-12-01), Van Cleve et al.
patent: 196 20 079 (2001-08-01), None
patent: 1 281 938 (2003-02-01), None

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