Apparatus and method for measuring fluid flow over a wide range of fluid flow conditions and viscosities
US3945253A · kind A · utility
Inventors
Key dates
| Filing date | Mar 28, 1974 |
| Grant date | Mar 23, 1976 |
| Priority date | — |
| Expiry date | Mar 28, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Flowmeter apparatus and method for obtaining accurate measurement of fluid flow, not only in the turbulent flow range, but also in the laminar and transitional flow ranges by compensation of the meter reading. The meter reading is also compensated for change in viscosity of the fluid flowing through the meter. The compensation for flow range is based on the best-fit straight line approach obtained by matching straight line segments to the quantity versus frequency output curve throughout the laminar and transitional ranges, and compensating the flowmeter reading in accordance with the shape of the straight line segments. The compensation for change in kinematic viscosity of the fluid is added to the flowmeter output in accordance with the temperature-viscosity relationship for the fluid and in accordance with a ratio of compensation factors between the actual fluid and a reference fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.