Invention Publication
- Patent Title: VERFAHREN ZUM ERMITTELN DES DURCHFLUSSES MITTELS ULTRASCHALL
- Patent Title (English): Method for determining the flow rate using ultrasound
- Patent Title (中): 方法用于利用超声流量
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Application No.: EP12740565.2Application Date: 2012-07-23
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Publication No.: EP2739943A1Publication Date: 2014-06-11
- Inventor: BEZDEK, Michal , UEBERSCHLAG, Pierre , BRUMBERG, Oliver
- Applicant: Endress+Hauser Flowtec AG
- Applicant Address: Kägenstrasse 7 4153 Reinach (BL) CH
- Assignee: Endress+Hauser Flowtec AG
- Current Assignee: Endress+Hauser Flowtec AG
- Current Assignee Address: Kägenstrasse 7 4153 Reinach (BL) CH
- Agency: Andres, Angelika Maria
- Priority: DE102011080365 20110803
- International Announcement: WO2013017447 20130207
- Main IPC: G01F1/66
- IPC: G01F1/66
Abstract:
A method for determining the flow rate of a fluid, which is a gas mixture, wherein at least one component of the gas mixture is a hydrocarbon, through a circular cylindrical measuring tube with a straight measuring tube longitudinal axis and an internal diameter D
I , characterized by the following method steps: determining a first average flow velocity v
L by measuring the propagation time difference of acoustic signals along a signal path; determining a modified Reynolds number Re
mod according to the formula Re
mod = (v
L *D
I )/v
kin , wherein v
kin , the kinematic viscosity of the fluid, is known; determining a second average flow velocity v
A using a known function v
A = f(Re
mod ) on the basis of the modified Reynolds number Re
mod , wherein the method step of determining the modified Reynolds number Re
mod is preceded by the method step of determining the kinematic viscosity v
kin of the fluid.
I , characterized by the following method steps: determining a first average flow velocity v
L by measuring the propagation time difference of acoustic signals along a signal path; determining a modified Reynolds number Re
mod according to the formula Re
mod = (v
L *D
I )/v
kin , wherein v
kin , the kinematic viscosity of the fluid, is known; determining a second average flow velocity v
A using a known function v
A = f(Re
mod ) on the basis of the modified Reynolds number Re
mod , wherein the method step of determining the modified Reynolds number Re
mod is preceded by the method step of determining the kinematic viscosity v
kin of the fluid.
Public/Granted literature
- EP2739943B1 VERFAHREN ZUM ERMITTELN DES DURCHFLUSSES MITTELS ULTRASCHALL Public/Granted day:2020-01-15
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