Electromagnetic flowmeter
US6865956B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 2002 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Sep 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/588
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
When a plane (PLN) which includes electrodes (2a, 2b) and is perpendicular to the direction of an axis (PAX) of a measuring pipe (1) is defined as a boundary in the measuring pipe (1), an exciting coil (3) applies asymmetrical magnetic fields to a fluid to be measured, which flows through the measuring pipe (1), on both sides of the plane (PLN) serving as the boundary in the measuring pipe (1). A signal conversion unit (5) obtains the phase difference between an exciting current supplied to the exciting coil (3) and an interelectrode electromotive force detected by the electrodes (2a, 2b). A flow rate output unit (6) calculates the flow rate of the fluid on the basis of the phase difference obtained by the signal conversion unit (5).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.