Flow measurement compensation technique for use with an averaging pitot tube type primary element
US5817950A · kind A · utility
92Cited by
18References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Jan 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transmitter in a process control system for measuring flow rate measures total pressure (P.sub.TOT) and differential pressure (h) of process fluid flowing through a process pipe. The static pressure (P.sub.STAT) is determined based upon the total pressure (P.sub.TOT). The calculated static pressure is used to determine the fluid density (.rho.) and the gas expansion factor (Y.sub.1) of the process fluid flowing in the pipe. This information is used to calculate flow rate (Q) of the process fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.