Patent · US Expired

Method and device for measuring volume flows in liquids and gases

US5325726A · kind A · utility

3Cited by

8References

21Claims

0Family size

Assignee

Prof. Dr.-Ing. Gunther Krieg · DE

Inventors

Gunther Krieg · Karlsruhe, DE
Thomas Dornhofer · Waldbronn, DE
Michael Schultz · San Jose, US

Key dates

Filing date	May 5, 1992
Grant date	Jul 5, 1994
Priority date	—
Expiry date	May 5, 2012

Classification

Technology area (CPC G)Physics
CPC primaryG01F1/662
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method and device for measuring a volume flow of fluids in flow channels using ultrasound, wherein two ultrasonic transducers, each with a different transmitting frequency, are disposed in a flow channel in such a manner that emitted wave trains travel toward one another, with speed vectors of both wave trains having components that are in the flow direction and against the flow direction, and the superimposed signal is evaluated in terms of its position with respect to time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.