Flow-rate measuring method and flow-rate measuring device
US7856892B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 2009 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Jan 30, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/7084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurable flow-rate range is increased to enhance usability. A flow-rate measuring method for measuring the flow rate of a fluid inside a tube is provided. This method uses a thermal-marker generator that heats the fluid flowing through the tube from the outside thereof to generate a thermal marker in the fluid inside the tube and a thermal-marker detector disposed downstream of the thermal-marker generator and configured to detect the thermal marker in the fluid inside the tube generated by the thermal-marker generator, so as to measure the flow rate on the basis of the distance between the thermal-marker generator and the thermal-marker detector, a time period between a point at which the thermal marker in the fluid inside the tube is generated by the thermal-marker generator and a point at which the thermal marker is detected by the thermal-marker detector, and the cross-sectional area of the tube. In this method, the thermal-marker generator heats the fluid by a microwave heating technique, and microwaves are applied to the fluid by using a microstrip line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.