Non invasive flow rate measuring system and method
US7908931B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 2009 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Dec 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/7084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for measuring the flow rate of a liquid in a tube non-invasively has a heating element that generates energy that is applied to the liquid to produce a heat marker that is detected by a temperature sensor located at a known distance from the heating element and the flow rate is calculated from measuring the travel time of the heat marker from the heating element to the sensor. A second temperature sensor measures the ambient temperature of the liquid before the heat marker is produced and detection of the heat marker is made on the basis of the difference between the ambient temperatures and the temperature of the heat marker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.