EP 1649251 A1 20060426 - METHOD FOR THE MAGNETIC-INDUCTIVE DETERMINATION OF THE FLOW RATE OF A MEDIUM
Title (en)
METHOD FOR THE MAGNETIC-INDUCTIVE DETERMINATION OF THE FLOW RATE OF A MEDIUM
Title (de)
VERFAHREN ZUR MAGNETISCH-INDUKTIVEN BESTIMMUNG DER DURCHFLUSSRATE EINES MEDIUMS
Title (fr)
PROCEDE DE DETERMINATION MAGNETO-INDUCTIVE DU DEBIT D'UN AGENT
Publication
Application
Priority
- EP 2004007976 W 20040716
- DE 10335205 A 20030730
Abstract (en)
[origin: WO2005012842A1] The invention relates to a magnetic-inductive method for determining the flow rate of a medium that penetrates a measuring tube (2) in the direction of the axis thereof. In order to be able to detect the formation of a coating at an early stage and with great reliability, a test pulse (Up) having a defined duration (tp) is applied to the measuring electrode (3, 4); at least one response signal to the test pulse (Up) is determined at least at two measurement times (t1, t2) located within a time slot (tend tbegin) which is selected such that no foreseeable unwanted signals occur at the measuring electrode (3, 4) during said time slot (tend tbegin); the relaxation period (t) or the time it takes the measuring electrode (3, 4) to reach a predefined discharged state (Ui) is determined based on the response signal determined at the measurement times (t1, t2); a malfunction of the measuring electrode (3, 4) is or can be detected based on the determined relaxation period (t) or the time it takes the measuring electrode (3, 4) to reach the defined discharged state (Ui).
IPC 1-7
IPC 8 full level
G01F 1/58 (2006.01)
CPC (source: EP US)
G01F 1/58 (2013.01 - EP US); G01F 1/60 (2013.01 - EP US); G01F 15/12 (2013.01 - EP US); G01F 25/10 (2022.01 - EP US)
Citation (search report)
See references of WO 2005012842A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005012842 A1 20050210; CN 100420920 C 20080924; CN 1829901 A 20060906; DE 10335205 A1 20050217; EP 1649251 A1 20060426; US 2007143041 A1 20070621; US 7340963 B2 20080311
DOCDB simple family (application)
EP 2004007976 W 20040716; CN 200480021655 A 20040716; DE 10335205 A 20030730; EP 04741101 A 20040716; US 56638804 A 20040716