Apparatus for measuring the flow quantity or associated parameters of a liquid with two ultrasonic transducers
US4159647A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1978 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Jan 20, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to ultrasonic apparatus for measuring flow quantities and related parameters of a liquid flowing with a free surface in a channel. Two transducers are mounted in longitudinally spaced relation to each other in the channel and below the level of the flowing liquid. The transducers are positioned and directed so that the effective measuring path therebetween is reflected from the underside of the liquid surface level and has components in the vertical direction and in the direction of flow. There is a measuring circuit for determining the transit times of the ultrasonic waves in both directions and an evaluating circuit for determining the desired quantities with regard to the transit times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.