Sensitivity enhancing balance bar

Details Sensitivity enhancing balance bar Sensitivity enhancing balance bar

1998-07-01

1999-11-23

Patel, Harshad

Measuring and testing

Volume or rate of flow

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

73861355, G01F 184

Patent

active

059879998

ABSTRACT:
A single tube Coriolis flowmeter having a balance bar that enhances the flowmeter sensitivity to material flow. The balance bar's design lowers its second bending mode response to have a frequency that may be lower than the flow tube resonant drive frequency. The lowering of the second bending mode frequency of the balance bar enables the Coriolis response of the vibrating flow tube with material flow to extend force from the flow tube through a brace bar to the balance bar. These Coriolis forces induce Coriolis-like response vibrations in the balance bar because of the lowered second bending mode frequency of the balance bar. The Coriolis response of the flowmeter is enhanced since the Coriolis-like response of the balance bar is out of phase with and is additive to the Coriolis deflection of the flow tube.

REFERENCES:
patent: 4823614 (1989-04-01), Dahlin
patent: 5531126 (1996-07-01), Drahm
patent: 5616868 (1997-04-01), Hegenmeyer
patent: 5796012 (1998-08-01), Gomi et al.

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