In-line measuring device

Details In-line measuring device In-line measuring device

2011-06-28

2011-06-28

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

07966894

ABSTRACT:
An in line measuring device, includes a measuring transducer having: a least one measuring tube vibrating, during operation, and serving for conveying, a two- or multiphase, flowable medium; an exciter mechanism for producing vibrations of the at least one measuring tube; a sensor arrangement for registering vibrations of the measuring tube and for delivering an oscillation measurement signal representing oscillations of the measuring tube, and a measuring device electronics electrically coupled with the measuring transducer. The measuring device electronics delivers, at least one exciter signal driving the exciter mechanism, and, in such a manner that the at least one measuring tube, during operation, —driven by the exciter mechanism driven by means of the at least one exciter signal—is excited, to execute vibrations in a wanted mode of the measuring transducer, in which it, at least partially, executes bending oscillations about an imaginary bending oscillation axis of the measuring transducer, Moreover, the measuring device electronics ascertains, a damping value of first type, which represents, instantaneously, a damping of vibrations of the at least one measuring tube, which opposes the bending oscillations of the at least one measuring tube corresponding to the Coriolis mode.

REFERENCES:
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patent: 2008/0066521 (2008-03-01), Logue
patent: 10 2004 021 690 (2005-11-01), None
patent: 1 724 558 (2006-11-01), None
patent: WO 2007/040468 (2007-04-01), None
U.S. Appl. No. 12/588,179 Daniel Kuttler et al Oct. 16, 2009.

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