Global Patent Index - EP 2188610 A1

EP 2188610 A1 20100526 - METHOD FOR DETERMINING AND/OR MONITORING VISCOSITY, AND CORRESPONDING APPARATUS

Title (en)

METHOD FOR DETERMINING AND/OR MONITORING VISCOSITY, AND CORRESPONDING APPARATUS

Title (de)

VERFAHREN ZUR BESTIMMUNG UND/ODER ÜBERWACHUNG DER VISKOSITÄT UND ENTSPRECHENDE VORRICHTUNG

Title (fr)

PROCEDE POUR DETERMINER ET/OU CONTROLER LA VISCOSITE ET DISPOSITIF CORRESPONDANT

Publication

EP 2188610 A1 20100526 (DE)

Application

EP 08787075 A 20080811

Priority

  • EP 2008060500 W 20080811
  • DE 102007043811 A 20070913

Abstract (en)

[origin: WO2009037050A1] The invention relates to a method for determining and/or monitoring the viscosity of a medium (2). In said method, a unit (1) that can mechanically oscillate is excited to oscillate by means of an excitation signal, and the unit (1) receives oscillations and converts the same into a receive signal. The natural oscillation (w0) and/or the resonant frequency (wres) of the unit (1) that can oscillate and/or the phase angle between the excitation signal and the receive signal are determined and/or monitored. Conclusions about a change in viscosity are drawn from changes in the natural oscillation (w0) and/or the resonant frequency (wres) and/or the phase angle, and/or the viscosity is determined from the natural oscillation (w0) and/or the resonant frequency (wres) and/or the phase angle on the basis of correspondingly stored dependencies of the oscillations on the viscosity of the medium. In a second variant of said method, the damping behavior of the unit that can mechanically oscillate is evaluated. The invention further relates to an apparatus for determining and/or monitoring viscosity.

IPC 8 full level

G01N 9/00 (2006.01); G01N 11/16 (2006.01)

CPC (source: EP US)

G01F 23/2965 (2013.01 - EP US); G01F 23/2967 (2013.01 - EP US); G01N 9/002 (2013.01 - EP US); G01N 11/16 (2013.01 - EP US)

Citation (search report)

See references of WO 2009037050A1

Citation (examination)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA MK RS

DOCDB simple family (publication)

DE 102007043811 A1 20090319; CN 101842687 A 20100922; CN 101842687 B 20130102; EP 2188610 A1 20100526; US 2010236323 A1 20100923; US 2014331747 A1 20141113; US 8756980 B2 20140624; US 9709475 B2 20170718; WO 2009037050 A1 20090326

DOCDB simple family (application)

DE 102007043811 A 20070913; CN 200880107160 A 20080811; EP 08787075 A 20080811; EP 2008060500 W 20080811; US 201414284628 A 20140522; US 73368508 A 20080811