Coriolis-type mass flow sensor with flow condition compensating

Details Coriolis-type mass flow sensor with flow condition compensating Coriolis-type mass flow sensor with flow condition compensating

1994-07-19

1996-07-02

Chilcot, Richard

Measuring and testing

Volume or rate of flow

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

73861356, G01F 184

Patent

active

055311261

ABSTRACT:
This mass flow sensor is to be fitted with two straight tubes, but conventionally needed manifolds are to be dispensed with. The sensor can be installed, by flanges, in a conduit of a given diameter so as to be axially aligned with the conduit, through which flows a fluid to be measured. It has a straight measuring tube, which extends between the flanges and is traversed by the fluid, and a straight dummy tube, which extends parallel to the measuring tube and is not traversed by the fluid. Also provided are a nodal plate on the inlet side and a nodal plate on the outlet side, one of which fixes the inlet-side end portion of the measuring tube to the corresponding end portion of the dummy tube, and the other of which fixes the outlet-side end portion of the measuring tube to the corresponding end portion of the dummy tube, such that the measuring tube and the dummy tube are arranged side by side. A support tube has its ends fixed to the respective flanges. A circuit for exciting resonance vibrations of the measuring tube acts only on the dummy tube. The measuring tube and dummy tube may also be coaxial with one another.

REFERENCES:
patent: 3729982 (1973-05-01), Senda
patent: 4422338 (1983-12-01), Smith
patent: 4793191 (1988-12-01), Flecken et al.
patent: 4801897 (1989-01-01), Flecken
patent: 4949583 (1990-08-01), Lang et al.
patent: 5253533 (1993-10-01), Lam et al.
patent: 5321991 (1994-06-01), Kalotay
patent: 5398554 (1995-03-01), Ogawa et al.
Vogtlin et al., "Direct Measurement of Mass Flow Using the Coriolis Force", FLOWTEC AG Flow Measurement, Reinach (Switzerland), pp. 1-8, 1988.

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