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:
Sep. 18, 2012
Filed:
Nov. 30, 2007
Ole Koudal, Baden, CH;
Chris Gimson, Reinach, CH;
Oliver Popp, Fislisbach, CH;
Endress + Hauser Flowtec AG, Reinach, CH;
Abstract
An apparatus for determining and/or monitoring mass flow of a fluid medium through a pipeline, or through a measuring tube. The apparatus includes two temperature sensors and a control/evaluation unit. The two temperature sensors are arranged in a region of a housing facing the medium and in thermal contact with the medium flowing through the pipeline, or through the measuring tube. A first of the temperature sensors is heatably embodied. A second of the temperature sensors provides information concerning the present temperature of the medium. The control/evaluation unit, on the basis of primary measured variables, such as temperature difference between the two temperature sensors and/or heating power fed to the first temperature sensor, ascertains the mass flow of the medium through the pipeline. The control/evaluation unit, in ascertaining the mass flow, provides a correction value for the mass flow and/or for the primary measured variable and/or for a measured value derived from the primary measured variable. And, the control/evaluation unit, in ascertaining the correction value, takes into consideration heat exchange by forced convection and heat exchange by free convection between the temperature sensors and the medium.