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:
Jun. 06, 2017
Filed:
Mar. 19, 2013
Endress + Hauser Flowtec Ag, Reinach, CH;
Anastasios Badarlis, Birsfelden, CH;
Tobias Baur, Reinach, CH;
Axel Pfau, Aesch, CH;
Hanno Schultheis, Lorrach, DE;
Endress + Hauser Flowtec AG, Reinach, CH;
Abstract
A method for determining mass flow of a gas by means of a mass flow meter, which has a first and a second temperature sensor, which can be flowed around by the gas. The first temperature sensor is heated with a heating power Q, wherein the mass flow of the medium is determined by means of a power coefficient PC=Q/ΔT as a function of a heating power Q and a temperature difference ΔT=T−Tbetween the measured values of the temperature sensor. A corrected power coefficient PCis determined, wherein at least one correction occurs by means of at least one recovery correction term K, wherein the recovery correction term Khas the form K=Δ·u/(2·c), wherein u is the flow velocity and cthe heat capacity of the medium, Δis an element of the set {Δ; Δ; Δ}, Δ:=e−c, Δ:=e−cand Δ:=e−e=Δ−Δ, eand eare the recovery factors of the first, respectively second, temperature sensors, and wherein cis a constant reference value, for which holds c≦1, especially c=1.