Flow metering
US7004036B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2005 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Apr 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/05
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for operating a flow meter incorporating thermal loss sensors and an installation adapter to provide known flow conditions upstream of the meter. The method includes distributing a plurality of the thermal loss sensors about a passageway through which flow is to be monitored, wherein during normal operation a single sensor is energized to provide an output representative of thermal loss due to the flow adjacent that sensor; and deriving an output representative of the flow rate from the output representative of thermal loss on the basis of a predetermined calibration relationship between flow rate and thermal loss from a single sensor; establishing the calibration relationship on the basis of outputs derived from all of the sensors at calibration, a representation of the relative values of the outputs of the sensors at calibration being recorded, and during use the accuracy of the calibration being tested by energizing all of the sensors; and comparing the relative values of the resultant sensor outputs with the recorded relative values, with changes in the relative values as between calibration and test being indicative of loss of calibration accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.