Vortex flowmeter
US6480812B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Mar 10, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/3287
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention encompasses a vortex flowmeter for measuring the flow rate of a fluid by detecting an alternating signal produced by Karman vortices using a sensor comprising a low pass filter for passing the frequency band of the alternating signal that is determined by the diameter and flow rate range of the vortex flowmeter; subband filters for splitting the frequency band passing through the low pass filter into a plurality of component bands; a spectrum analyzer for analyzing the plurality of component bands; and a bandpass filter for passing a frequency band to be measured according to the analysis results of the spectrum analyzer, thereby providing flow rate measurement with high precision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.