Vortex flowmeter
US4924710A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | May 19, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/3282
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vortex flowmeter comprising ultrasonic wave transmitters and ultrasonic wave receivers adapted to receive ultrasonic waves transmitted by the transmitters through a flow of fluid in which vortices are generated by a vortex generator, the ultrasonic wave signals output by the ultrasonic wave receivers being compared by a phase comparator to measure the flow rate of the fluid by detecting the difference in phase of the ultrasonic waves due to generation of the vortices. First and second ultrasonic wave transmitters are disposed on the wall of a pipe line defining the flow path for the fluid downstream of the vortex generator and first and second ultrasonic wave receivers are respectively disposed at positions on the wall of the pipe line opposite to the first and second transmitters and in such a manner that the first propagation route for the ultrasonic waves propagating from the first ultrasonic wave transmitter to the first ultrasonic wave receiver and the second propagation route for ultrasonic waves propagating from the second ultrasonic wave transmitter to the second ultrasonic wave receiver intersect each other and extend in opposite directions. The phase of the respective u…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.