Annular void electromagnetic flowmeter
US6752026B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Feb 3, 2003 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Feb 3, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/586
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The Annular Void Electromagnetic Flowmeter [AVEF] is a flowmeter in which fluid flow rate of compressible or incompressible fluid is determined by measuring a fluid-mechanical-electrical response that is dependent upon an electromagnetic field. The construction of the flowmeter may be such that it does not reduce the flowing area of an open or closed fluid conduit. The measured electronic response may be generated by a fluid that is in an explosive, fast-transient, or steady-state flow condition, and which fluid may have a laminar, turbulent, or combined flowing property. High resolution of flow rate is achieved by a range of magnitude of the measured voltage with respect to a reference voltage of up to fifty percent. The AVEF is characterized by an annular void for obstructionless flow and by perturbations of an impressed electromagnetic field in which the field is altered as a result of an expanding fluid. The electromagnetic field is generated by an axial or a longitudinal coil. The AVEF has the attributes of a tunable impedance in which fluid force alters the electronic response of a resonant circuit. Fluids can flow through the flowmeter in either direction at widely differing…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.