Electromagnetic flow sensor
US6983661B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 2004 |
| Grant date | Jan 10, 2006 |
| Priority date | — |
| Expiry date | May 22, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/586
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The flow sensor serves to measure an electrically conductive fluid flowing in a pipe. It comprises a flow tube designed to be inserted into the pipe for conducting the fluid, the flow tube being electrically nonconductive at least on a fluid-contacting inner side, an electrode arrangement consisting of at least two measuring electrodes disposed on the flow tube for picking up a voltage induced in the fluid, and a magnetic field system likewise disposed on the flow tube. The magnetic field system comprises at least two saddle-shaped field coils for producing a magnetic field cutting the fluid during operation of the flow sensor, a respective ferromagnetic pole piece for each of the two field coils, as well as at least one ferromagnetic return path extending around the flow tube upstream of the two field coils and at least one ferromagnetic return path extending around the flow tube downstream of the two field coils for directing the magnetic field around the flow tube. The pole pieces are magnetically coupled to the return paths by means of ferromagnetic coupling elements. Each of the, preferably identically shaped, coupling elements has at least one essentially trough-shaped cover …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.