Bypass type coriolis effect flowmeter
US5861561A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1997 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Feb 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A bypass flowmeter for measuring the material flow in a conduit. An optimum pressure drop is developed across the flowmeter by coupling the material outlet of the flowmeter to the throat of a venturi positioned within the conduit. This increased pressure drop improves the material flow rate through the flowmeter. This enhances flowmeter accuracy and sensitivity and the flowmeter's ability to measure mass flow rates for low density materials such as gas. The ratio of the material flow within the flowmeter to that of the conduit is derived with improved precision over prior arrangements which assume a constant ratio of material flow between the flowmeter and the conduit. The material flow information for the conduit is obtained for materials having a varying viscosity by the use of a differential pressure sensor which measures the pressure drop across the flowmeter and transmits this information to instrumentation which uses it to derive material flow information for the conduit with improved precision. An alternative embodiment not having a venturi operates in the same manner to derive the material flow ratio between the flowmeter and the conduit and, in turn, the total material flo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.