Electromagnetic velocity transducer
US4389898A · kind A · utility
Inventors
Key dates
| Filing date | Dec 4, 1980 |
| Grant date | Jun 28, 1983 |
| Priority date | — |
| Expiry date | Dec 4, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A low power, reliable velocity transducer is particularly adapted to measure the flow of a fluid in a metallic pipe. A pair of U-shaped cores of high magnetic permeability are arranged side-by-side and surrounded by an energizing coil to provide an electromagnet of high electromagnetic energy conversion efficiency and low susceptibility to stray and shunt fields. A triad of electrodes is mounted thereon to detect a resultant electric field from the interaction of the velocity of the flow with the imposed magnetic field. Conductors engaged to the measuring electrodes effect a generally S-shaped geometry so that the signals applied to a differential amplifier to derive the E field waveforms are unencumbered by induced currents unrelated to the cross product of B and V.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.