Coriolis mass measuring device

Details Coriolis mass measuring device Coriolis mass measuring device

2008-04-15

2008-04-15

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

07357039

ABSTRACT:
A Coriolis mass flow measuring device includes a vibratory measuring transducer having at least one measuring tube, which has medium flowing through it during operation. In operation, the measuring tube is caused by an exciter arrangement to undergo mechanical oscillations, especially bending oscillations. Additionally, the Coriolis mass flow measuring device includes a sensor arrangement for producing oscillation measurement signals (s1, s2) representing the inlet-end and outlet-end oscillations of the measuring tube. Measuring device electronics controlling the exciter arrangement produces an exciter current (iexc) and an intermediate value (X′m) derived from the oscillation measurement signals (s1, s2). This intermediate value represents an uncorrected mass flow. Derived from the exciter current and/or from a component of the exciter current (iexc), an intermediate value (X2) is produced, which corresponds to a damping of the oscillations of the measuring tube. This damping is especially a function of an apparent viscosity, and/or a viscosity-density product, of the medium guided in the measuring tube. Furthermore, a correction value (XK) is produced for the intermediate value (X′m) utilizing the intermediate value (X2) and a viscosity measurement value (Xη) determined initially or during operation. The viscosity measurement value (Xη) corresponds to a viscosity of the medium guided in the measuring tube and/or to a predetermined reference viscosity. On the basis of the intermediate value (X′m) and the correction value (XK), the measuring device electronics then produces an exact mass flow rate measurement value (Xm).

REFERENCES:
patent: 4187721 (1980-02-01), Smith
patent: 4491025 (1985-01-01), Smith
patent: 4524610 (1985-06-01), Fitzgerald
patent: 4660421 (1987-04-01), Dahlin
patent: 4733569 (1988-03-01), Kelsey
patent: 4801897 (1989-01-01), Flecken
patent: 4876898 (1989-10-01), Cage
patent: 5069074 (1991-12-01), Young
patent: 5218873 (1993-06-01), Lang
patent: 5253533 (1993-10-01), Lam
patent: 5301557 (1994-04-01), Cage
patent: 5448921 (1995-09-01), Cage
patent: 5531126 (1996-07-01), Drahm
patent: 5602345 (1997-02-01), Wenger
patent: 5602346 (1997-02-01), Kitami
patent: 5616868 (1997-04-01), Hagenmeyer
patent: 5796011 (1998-08-01), Keita
patent: 5869770 (1999-02-01), Yoshimura
patent: 6006609 (1999-12-01), Drahm
patent: 6311136 (2001-10-01), Henry
patent: 6378364 (2002-04-01), Pelletier
patent: 6505519 (2003-01-01), Henry
patent: 6513393 (2003-02-01), Eckert
patent: 6636815 (2003-10-01), Keilty
patent: 6651513 (2003-11-01), Wenger
patent: 6691583 (2004-02-01), Rieder
patent: 6910366 (2005-06-01), Drahm
patent: 7191667 (2007-03-01), Wenger et al.
patent: 2001/0039839 (2001-11-01), Wenger
patent: 2002/0184940 (2002-12-01), Storm, Jr.
patent: 2003/0056574 (2003-03-01), Drahm
patent: 2003/0208325 (2003-11-01), Keilty
patent: 2003/0233878 (2003-12-01), Drahm
patent: 2004/0221660 (2004-11-01), Dutton
patent: 2005/0022611 (2005-02-01), Hemp
patent: 2005/0081643 (2005-04-01), Mattar
patent: 0 553 939 (1993-08-01), None
patent: 1 001 254 (2000-05-01), None
patent: 1 281 938 (2003-02-01), None
patent: 1 291 639 (2003-03-01), None
patent: WO 88/03261 (1988-05-01), None
patent: WO 93/01472 (1993-01-01), None
patent: WO 95/16897 (1995-06-01), None
patent: WO 97/03339 (1997-01-01), None
patent: WO 98/07009 (1998-02-01), None
patent: WO 99/39164 (1999-08-01), None
patent: WO 00/36379 (2000-06-01), None
patent: WO 00/57141 (2000-09-01), None
patent: WO 01/33174 (2001-05-01), None
patent: WO 02/37063 (2002-05-01), None
patent: WO 03/076880 (2003-09-01), None
patent: WO 03/095949 (2003-11-01), None
patent: WO 03/095950 (2003-11-01), None

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