Global Patent Index - EP 1163494 A1

EP 1163494 A1 2001-12-19 - DEVICE AND METHOD FOR ULTRASONIC MEASUREMENT OF A FLUID FLOW RATE COMPRISING A SIGMA-DELTA BAND PASS ANALOG-TO-DIGITAL CONVERTER

Title (en)

DEVICE AND METHOD FOR ULTRASONIC MEASUREMENT OF A FLUID FLOW RATE COMPRISING A SIGMA-DELTA BAND PASS ANALOG-TO-DIGITAL CONVERTER

Title (de)

VORRICHTUNG UND VERFAHREN ZUR ULTRASCHALLSTRÖMUNGSMESSUNG MIT EINEM BANDPASS-SIGMA-DELTA-ANALOG-DIGITAL-WANDLER

Title (fr)

DISPOSITIF ET PROCEDE DE MESURE ULTRASONORE DE DEBIT DE FLUIDE COMPORTANT UN CONVERTISSEUR ANALOGIQUE NUMERIQUE SIGMA-DELTA PASSE BANDE

Publication

EP 1163494 A1 (FR)

Application

EP 99961156 A

Priority

  • FR 9903266 W
  • FR 9816608 A

Abstract (en)

[origin: FR2787880A1] The invention concerns a device for ultrasonic measurement of a fluid flow rate comprising a first and a second transducer (1, 2) placed in the fluid whereof the flow is to be determined. Said device comprises means for processing (21) an analog signal coming from the receiving transducer, designed to transform it into a digital signal used for determining the fluid flow rate. Said means processing (21) the analog signal comprise a Sigma-Delta band pass converter including a passband loop filter (22) whereof the input is connected to said receiving transducer output, an analog-to-digital converter (24) whereof the input is connected to said loop filter (22) output, said analog-to-digital converter output (24) forming the digital output of said analog-to-digital converter output (21), and a digital-to-analog converter (26), forming a feedback loop, connecting the analog converter (24) output to said loop filter input (22). In a preferred embodiment, the band pass loop filter (22) of the Sigma-Delta band pass converter consists of the receiving transducer.

IPC 1-7 (main, further and additional classification)

G01F 1/66

IPC 8 full level (invention and additional information)

G01F 1/66 (2006.01); H03M 3/02 (2006.01)

CPC (invention and additional information)

G01F 1/667 (2013.01)

Citation (search report)

See references of WO 0039538A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

FR 2787880 A1 20000630; FR 2787880 B1 20010302; AU 1786000 A 20000731; CN 1332841 A 20020123; EP 1163494 A1 20011219; JP 2002533709 A 20021008; US 6696843 B1 20040224; WO 0039538 A1 20000706

INPADOC legal status


2003-05-28 [18W] WITHDRAWN

- Effective date: 20030327

2003-05-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010723

2001-12-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-12-19 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI