State detection device
US8037774B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 2010 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Sep 2, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A state detection device which detects parameters includes a measuring pipe, electrodes, an exciting coil that applies a magnetic field to the fluid, signal lines arranged at angle to the magnetic field such that an electromotive force is generated due to a change with passage of time in the magnetic field, and a state quantifying unit for extracting a ∂A/∂t component from resultant electromotive forces that are detected at the electrodes and the signal lines and are composed of an electromotive force of the ∂A/∂t component irrelevant to a flow velocity of the fluid and resulting from a change with passage of time in the magnetic field and an electromotive force of a v×B component relevant to the flow velocity of the fluid, and extracts a variation factor relevant to the parameter from the ∂A/∂t component to quantify the parameter based on the variation factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.