Mass flow meter on the coriolis principle
US4680974A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Feb 5, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/8495
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a mass flow meter operable on the Coriolis principle having two rectilinear juxtaposed parallel arranged measuring tubes mechanically interconnected at their ends. An oscillator between the tubes produces opposite oscillatory movement of the tubes with a harmonic oscillation superimposed on the fundamental oscillation. Sensors between the tubes on opposite sides of the oscillator sense relative movement between the tubes and generate signals corresponding thereto. A circuit responsive to these signals determines resonant frequencies of the fundamental and harmonic oscillations and derives therefrom a correcting value which gives effect to axial stresses in the measuring tubes to determine a corrected mass flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.