Method for measuring flow rate and direction of a fluid in a conduit
US5509313A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Sep 30, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring fluid flow through a conduit first finds a null position then rotates the probe 90.degree. from the null position to be aligned with the true flow direction of the field. The null position is found by incremental movement of the probe through selected angles. At each position a differential pressure reading is taken. These readings are then compared to determine subsequent incremental movements to identify an approximate null position. The true null position is found from the approximate null by applying at least squares fit to differential pressure readings taken within a range, preferably +/-5.degree., around the approximate null. The probe is then rotated 90.degree. from the null position. A plurality of differential pressure readings are taken and the square root of each such reading is found. An average of those square roots is multiplied by a predetermined constant to find the flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.