Vortex flow meter transducer
US4085614A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1975 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Dec 11, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/3266
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vortex-shedding flow-sensing instrument comprising a flat-faced vortex-generating plate integral with a downstream sensor-bar having flat sides set back laterally with respect to the rows of vortices shed from the edges of the vortex-generating plate. The side surfaces of the plate are tapered inwardly at a moderate angle, and extend downstream a short distance to rear surfaces at right angles with respect to the direction of fluid flow. The downstream end of the sensor bar comprises a tail piece the side surfaces of which are tapered inwardly at a moderate angle, and extend downstream a short distance to a rear surface perpendicular to the direction of fluid flow. The sensor bar carries a liquid-filled capsule having as side walls a pair of flexible diaphragms effectively in the plane of the sensor-bar side surfaces. These diaphragms are of moderately large area so as to respond to a relatively large portion of the vortex energy. The diaphragms transmit alternating vortex pressure pulses interiorly of the capsule to a sensing element in the form of a ceramic disc having piezo-electric properties. The resulting alternating voltage signal developed by this element is coupled throu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.