Fluid flow measuring and proportional fluid flow control device
US7885773B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2008 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | May 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06N7/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments disclosed herein provide restrictive-flow flow measurement devices, valve improvements and signal control devices and processes that control the flow of liquids, including control processes for single-liquid calibration. In some embodiments, a fluid flow device can be calibrated using a single standard calibration fluid. The fluid flow of a first fluid through a flow meter is measured by calculating a first pressure difference between pressures sensed by two pressure sensors of the flow meter. The fluid flow of a second fluid through the flow meter is measured by calculating a second pressure difference between pressures sensed by the same two pressure sensors. A calibration coefficient is determined based upon the relationship between the flow rate, the fluid density and the calculated pressure difference for the first and second fluids. A relationship between the calibration coefficient and the kinematic viscosity of each fluid is then determined and stored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.