Vibration measuring instrument

Details Vibration measuring instrument Vibration measuring instrument

1995-09-08

1998-03-17

Chilcot, Richard

Measuring and testing

Volume or rate of flow

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

73 32A, G01F 184

Patent

active

057289522

ABSTRACT:
The precision of phase difference obtained by a phase difference calculating unit is improved by correction through outputs of a frequency ratio calculating unit and a temperature calculating unit considering that the phase or time difference of each output signal of a vibration sensor indicating the mass flow or density of a fluid is a function of the temperature and axial force on a measurement pipe, or that the axial force is a function of the ratio between two resonant frequencies.

REFERENCES:
patent: 5054326 (1991-10-01), Mattar
patent: 5115683 (1992-05-01), Pratt
patent: 5373745 (1994-12-01), Cage
patent: 5398554 (1995-03-01), Ogawa et al.
patent: 5448921 (1995-09-01), Cage et al.
patent: 5469748 (1995-11-01), Kalotay

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