Vortex flow meter
US4201084A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1978 |
| Grant date | May 6, 1980 |
| Priority date | — |
| Expiry date | Nov 9, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P5/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vortex flow meter produces Karman's vortices in a fluid to be measured and a piezoelectric sensor develops a vortex signal therefrom which is proportional to the flow velocity of the fluid. The output signal of the sensor is applied to a charge amplifier and a low pass filter coupled thereto which functions to a predetermined signal amplitude for limiting low and high frequency noise and stabilizing the gain of the system within the vortex frequency measuring range. The output signal is converted by a logic circuit to a pulse signal of vortex frequency and then converted to a DC signal for transmission to an indicator or a receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.