Coriolis mass-flow measuring device

Details Coriolis mass-flow measuring device Coriolis mass-flow measuring device

2006-05-09

2006-05-09

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

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

Reexamination Certificate

active

07040180

ABSTRACT:
A Coriolis mass-flow/density meter includes at least one measuring tube, which is traversed in operation by medium. A support structure of the Coriolis mass-flow/density meter is fixed at an inlet end and at an outlet end of the measuring tube and thus clamps the measuring tube such that it can oscillate. In operation, the measuring tube is caused by means of an exciter arrangement to oscillate with mechanical oscillations, especially bending oscillations. Furthermore, the Coriolis mass-flow/density meter includes structure for producing measurement signals (xs1, xs2) representing inlet-end and outlet-end oscillations of the measuring tube. An evaluation electronics produces an intermediate value (X′m) derived from the measurement signals (xs1, xs2) and representing an uncorrected mass flow rate. The evaluation electronics also produces a correction value (XK) for the intermediate value (X′m). The correction value (XK) is derived from the measurement signals (xs1, xs2), especially from a second measured value (Xρ) representing a density of the medium and especially likewise produced in the evaluation electronics. Moreover, the evaluation electronics produces a measured value (Xm) representing a mass flow rate on the basis of the intermediate value (X′m) and the correction value (XK).

REFERENCES:
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patent: 5069074 (1991-12-01), Young et al.
patent: 5648616 (1997-07-01), Keel
patent: 6006609 (1999-12-01), Drahm et al.
patent: 6513393 (2003-02-01), Eckert
patent: 0 831 306 (1998-03-01), None
patent: WO 00/36379 (2000-06-01), None

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