EP 1397647 A2 20040317 - EXCITATION CIRCUITS FOR CORIOLIS MASS FLOWMETERS
Title (en)
EXCITATION CIRCUITS FOR CORIOLIS MASS FLOWMETERS
Title (de)
ERREGER-SCHALTUNGEN FÜR CORIOLIS-MASSEDURCHFLUSSMESSER
Title (fr)
CIRCUITS D'EXCITATION DESTINES A DES DISPOSITIFS DE MESURE DE DEBIT DE MASSE DE CORIOLIS
Publication
Application
Priority
- EP 02747393 A 20020617
- EP 0206631 W 20020617
- EP 01114644 A 20010619
Abstract (en)
[origin: EP1271111A1] The excitation circuit has a peak value detector (pd) receiving a signal from one of the sensors (7,8) positioned along the vibrating measuring tube of the flowmeter at its input and a comparator (sa) comparing the output of the peak value detector with an adjustable reference signal (Sr) defining a vibration amplitude. The output of the comparator is multiplied with the input signal of the peak value detector via a multiplier (m) coupled to an output stage (ps) supplying the excitation assembly (6) for vibration of the measuring tube. An Independent claim for a coriolis mass flowmeter provided with an excitation circuit is also included.
IPC 1-7
IPC 8 full level
G01F 1/84 (2006.01); G08C 19/02 (2006.01)
CPC (source: EP)
G01F 1/8409 (2013.01); G01F 1/8413 (2013.01); G01F 1/8431 (2013.01); G01F 1/8477 (2013.01); G08C 19/02 (2013.01)
Citation (search report)
See references of WO 02103302A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1271111 A1 20030102; EP 1397647 A2 20040317; WO 02103302 A2 20021227; WO 02103302 A3 20030918
DOCDB simple family (application)
EP 01114644 A 20010619; EP 0206631 W 20020617; EP 02747393 A 20020617