EP 1242792 A1 20020925 - METHOD AND DEVICE FOR DETECTING A DYSFUNCTION OF AN ULTRASONIC FLOWMETER
Title (en)
METHOD AND DEVICE FOR DETECTING A DYSFUNCTION OF AN ULTRASONIC FLOWMETER
Title (de)
VERFAHREN UND VORRICHTUNG ZUR FEHLERERKENNUNG FÜR EINEN ULTRASCHALLDURCHFLUSSMESSER
Title (fr)
PROCEDE ET DISPOSITIF DE DETECTION D'UN DYSFONCTIONNEMENT POUR UN DEBITMETRE A ULTRASONS
Publication
Application
Priority
- FR 0003590 W 20001219
- FR 9916699 A 19991229
Abstract (en)
[origin: FR2803383A1] The invention relates to a method for detecting a dysfunction such as clogging or ageing in a flowmeter comprising at least one transducer. Said method also enables the generation of a conditioned signal based on an analog signal from said transducer. The method comprises the following steps: measuring the receive signal (VIN) output from the transducer; comparing a characteristic of a received signal with a predetermined reference characteristic (VREF); storing a peak voltage (VPK) of the receive signal (VIN); generating a warning signal (VAL) when a triggering characteristic (VDEC) of the receive signal (VIN) is lower than the predetermined reference characteristic (VREF); defining a threshold voltage (VTH) which is proportionate to the peak amplitude of the receiving signal in such a way that (VTH) = K x (VPK), K being a factor that is dependent on the transducer; comparing the receive signal (VIN) to the threshold voltage (VTH); generating a conditioned output signal (VOUT) in a first state when a receive signal (VIN) is above a threshold voltage (VTH) and in a second state when the receive signal (VIN) is lower than the threshold voltage (VTH).
IPC 1-7
IPC 8 full level
G01F 1/66 (2006.01)
CPC (source: EP US)
G01F 1/667 (2013.01 - EP US)
Citation (search report)
See references of WO 0150095A1
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)
FR 2803383 A1 20010706; FR 2803383 B1 20020329; AU 2686801 A 20010716; BR 0017057 A 20030107; CN 1192212 C 20050309; CN 1415068 A 20030430; EP 1242792 A1 20020925; JP 2003519375 A 20030617; MX PA02006401 A 20050826; RU 2002120506 A 20040310; RU 2232978 C2 20040720; US 6766276 B1 20040720; WO 0150095 A1 20010712
DOCDB simple family (application)
FR 9916699 A 19991229; AU 2686801 A 20001219; BR 0017057 A 20001219; CN 00817937 A 20001219; EP 00990063 A 20001219; FR 0003590 W 20001219; JP 2001549996 A 20001219; MX PA02006401 A 20001219; RU 2002120506 A 20001219; US 16933902 A 20020930