Double wing vortex flowmeter with strouhal number corrector
US5347873A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Sep 9, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/3287
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vortex flowmeter includes a body having a flow passage, a vortex generator that generates a standing transverse wave in the flow passage, and first wing and second wings in the passage downstream of the generator. A circuit that utilizes sensors in the two wings is provided for first determining an operational phase difference, .DELTA..phi..sub.m between the signals representing movement of the first and second wings. A microprocessor then determines a corrected vortex frequency, .sup.f corr, in response to a ratio of a predetermined calibration phase difference .DELTA..phi..sub.c to the measured phase difference .DELTA..phi..sub.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.