US 12,241,764 B2
Method and device for non-invasively determining properties of a multiphase flow
Rüdiger Bauernschmitt, Linkenheim-Hochstetten (DE); Michael Black, Münster (DE); Natalia Rodriguez, CR Enschede (NL); Ralf Schlesiger, Münster (DE); and Burkhard Reetmeyer, Neuenhaus (DE)
Assigned to ROSEN 2 Holding AG, Stans (CH)
Appl. No. 17/285,934
Filed by ROSEN SWISS AG, Stans (CH)
PCT Filed Oct. 10, 2019, PCT No. PCT/EP2019/077533
§ 371(c)(1), (2) Date Apr. 16, 2021,
PCT Pub. No. WO2020/078833, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 102018125923.9 (DE), filed on Oct. 18, 2018.
Prior Publication US 2021/0381866 A1, Dec. 9, 2021
Int. Cl. G01F 1/663 (2022.01); G01N 29/032 (2006.01); G01N 29/22 (2006.01); G01N 29/24 (2006.01); G01N 33/28 (2006.01)
CPC G01F 1/663 (2013.01) [G01N 29/032 (2013.01); G01N 29/222 (2013.01); G01N 29/2412 (2013.01); G01N 33/2847 (2013.01); G01N 2291/015 (2013.01); G01N 2291/024 (2013.01); G01N 2291/106 (2013.01)] 37 Claims
OG exemplary drawing
 
1. A method for non-invasively determining properties of a multiphase flow which comprises a liquid fraction and a gaseous fraction and flows through an electrically conductive object, the method using a single set-up having a plurality of EMAT transducers, the method comprising the steps of:
determining the velocity of the gaseous fraction by spatially correlating at least two signals with one another;
determining the velocity of the liquid fraction by evaluating:
at least one signal arising on the basis of a wave reflected from a reflection source in the multiphase flow, or
at least one signal arising on the basis of a wave transmitted upstream and coupled at least into a part of the multiphase flow and at least one signal arising on the basis of a wave transmitted downstream and coupled at least into a part of the multiphase flow; and
determining at least one of the flow cross-section fraction of the gaseous fraction and the flow cross-section fraction of the liquid fraction by evaluating:
at least one signal arising on the basis of a wave transmitted downstream or upstream and coupled at least into a part of the multiphase flow, or
at least one signal arising on the basis of a part of a wave transmitted downstream or upstream, said part propagating exclusively in the object wall.