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:
Jan. 14, 2020
Filed:
Dec. 07, 2015
Endress + Hauser Flowtec Ag, Reinach, CH;
Martin Arnold, Reinach, CH;
Axel Pfau, Aesch, CH;
ENDRESS + HAUSER FLOWTEC AG, Reinach, CH;
Abstract
A thermal flow measuring device for determining and/or monitoring the mass flow and/or the flow velocity of a flowable medium through a pipeline, comprising at least three sensor elements and an electronics unit. Each sensor element is in thermal contact with the medium, and includes a heatable temperature sensor. The electronics unit is embodied to heat each of the three sensor elements with a heating power, to register their temperatures, to heat at least two of the at least three sensor elements simultaneously, to ascertain the mass flow and/or the flow velocity of the medium, from a pairwise comparison of the temperatures and/or heating powers and/or at least one variable derived from at least one of the temperatures and/or heating powers, to provide information concerning a change of the thermal resistance of at least one of the at least three sensor elements, from a response to an abrupt change of the heating power supplied to at least one of the at least three sensor elements, to provide information concerning a change of the inner thermal resistance of the at least one sensor element, and in the case that a change of the inner and/or outer thermal resistance occurs in the case of at least one of the at least three sensor elements, to perform a correction of the measured value for the mass flow and/or the flow velocity and/or to generate and to output a report concerning the state of the at least one sensor element mass flow and/or the flow velocity.