Method of automatically measuring fluid flow rates
US4653321A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1985 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Jun 7, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6965
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method comprises providing at least two fluid flow channels of different sizes wherein each contain a temperature sensitive resistance fluid flow sensor. An electronic controller is provided with the electrical information from the temperature sensitive resistance fluid flow sensor. The electronic controller is provided with a data base including at least the calibration data between fluid flow rate and the electrical information from the resistance sensor and the designated fluid flow rates at which each of the flow channels other than the smallest that could be opened or closed. Next, the fluid whose flow rate is to be measured is caused to flow through the smallest flow channel. Then the electronic controller compares the flow rate through the smallest flow channel with the designated flow rate for the smallest channel and opens the next larger flow channel to fluid flow if the designated flow rate is exceeded or closes such flow channel if such designated flow rate is not exceeded. If the next largest channel is to be opened, the proceeding three steps are repeated for each succeeding pair of flow channels until the flow rate does not exceed the designated flow rate or until …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.