Clamp-on ultrasonic volumetric flowmeter
US5533408A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1994 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Dec 22, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/7082
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To permit this flowmeter to automatically operate either on one measurement principle or on another depending on a selectable foreign-particle content of the fluid, it has a first pair of ultrasonic transducers, one of which is operated as a transmitting transducer and the other as a receiving transducer or vice versa, and which are mounted on the outside surface of a fluid-carrying pipe and separated by a given distance in a direction parallel to the axis of the pipe, with the angle between the direction of the ultrasound and the pipe axis differing from 90.degree.. There is provided a second pair of ultrasonic transducers which are operated simultaneously as transmitting transducers or receiving transducers and are mounted on the outside surface of the pipe and separated by a given distance in a direction parallel to the axis of the pipe, the angle between the direction of the ultrasound and the pipe axis being less than or equal to 90.degree.. Driver/evaluation electronics either supply the ultrasonic transducers of the first pair successively with a pulse burst, measure the travel time in the downstream and upstream directions of the ultrasonic signals propagating through the f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.