Multi-vortex flowmeter
US7614297B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 2004 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Sep 9, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F7/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flowmeter having a vortex type detection means with a measurement tube provided in a flow passage that allows passage of a fluid therethrough, and having a vortex generator provided in the measurement tube that is opposed to a flow of the fluid. The flowmeter also includes a vortex detector detecting a change based on a Karman vortex generated by the vortex generator, a thermal type detection means having a temperature sensor and a heating temperature sensor protruding into the flow passage, and a flow rate converter controlling a power supply amount related to heating of the heating temperature sensor for attaining a fixed difference in temperature between the temperature sensor and the heating temperature sensor and calculating a flow rate of the fluid from the power amount. The flow rate converter also calculates the flow rate of the fluid from a detection value obtained by the vortex detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.