Methods of measuring fluid viscosity and flow rate
US4331025A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Oct 14, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02881
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring the flow rate of a fluid through a conduit by means of a sonic flow meter employing the steps of measuring the speed of sound transmission through the fluid from an upstream point in the conduit to an opposed downstream point, measuring the speed of sound transmission through the fluid from the downstream point to the upstream point, subtracting the two measurements to obtain a liquid flow rate indication, adding the two measurements to obtain the fluid sound velocity, measuring the temperature of the fluid in the conduit, determining a measurement of the fluid viscosity from the fluid speed of sound transmission and the temperature, and correcting the determined fluid velocity utilizing the detected fluid viscosity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.