The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2012
Filed:
Nov. 09, 2007
Arno Willem Frederik Volker, Delft, NL;
Huibert Blokland, Noordeloos, NL;
Johannes Fransiscus Maria Velthuis, Leiden, NL;
Joost Conrad Lötters, Ruurlo, NL;
Arno Willem Frederik Volker, Delft, NL;
Huibert Blokland, Noordeloos, NL;
Johannes Fransiscus Maria Velthuis, Leiden, NL;
Joost Conrad Lötters, Ruurlo, NL;
Abstract
A fluid flow meter is described that uses thermal tracers to measure flow speed. For fluid flowing through a conduit, the fluid is heated at a heating location in the conduit with a time-dependent heating strength. A speed of sound in fluid flowing in the conduit is measured at multiple sensing locations downstream from said heating location. The flow speed of the fluid is determined from a delay with which the time dependence is detected in the sound speeds measured at the sensing locations. A frequency of the variation of heating strength that is used to determine the flow speed is selected automatically based on the flow speed and/or other circumstances.