Global patent index - EP 1019677 A1

EP 1019677 A1 2000-07-19 - TURBULENT FLOW SENSOR

Title (en)

TURBULENT FLOW SENSOR

Title (de)

WIRBELSTRÖMUNGSAUFNEHMER

Title (fr)

CAPTEUR D' COULEMENT TURBULENT

Publication

EP 1019677 A1 (DE)

Application

EP 99944110 A

Priority

  • EP 99944110 A
  • EP 9905884 W
  • EP 98115162 A

Abstract (en)

[origin: WO0009973A1] The present invention relates to a turbulent flow sensor (1) in which the vortex piezoelectric detector (3, 3', 3", 3*) can be easily assembled from individual components so that a defective piezoelectric member (34, 34', 34", 34*, 34<+>, 34<++>) in said sensor can be easily replaced. The vortex detector can also be designed so as to be essentially non-sensitive to vibration applied from the outside. This turbulent flow sensor (1) is used for measuring the flow speed and/or the flow rate of a fluid flowing in a measuring tube (2). A retaining member (4) that generates Karman vortices is arranged along the diameter of the measuring tube and is connected thereto at one or more connection point (41). The vortex detector is sensitive to the vortex-induced pressure fluctuation and is either introduced sealingly and downstream from the retaining member into an opening (22) on the wall side of the measuring tube, or protrudes through a main opening (46) that extends in the retaining member through the measuring tube. A membrane (33, 33", 33<+>) is used for covering the main opening (46) or the opening (22). A detector tab (31, 31", 31<+>) or a detector bushing (31', 31*) is connected at the surface (331) of the membrane which is directed towards the fluid. The piezoelectric member is mechanically coupled to the surface (332) of the membrane which is opposite from the fluid.

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

G01F 1/32

IPC 8 full level (invention and additional information)

G01F 1/32 (2006.01)

CPC (invention and additional information)

G01F 1/3263 (2013.01)

Citation (search report)

See references of WO 0009973A1

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

WO 0009973 A1 20000224; CN 1131996 C 20031224; CN 1275196 A 20001129; EP 1019677 A1 20000719; JP 2002522781 A 20020723; JP 3305704 B2 20020724; US 6352000 B1 20020305

INPADOC legal status

2010-01-20 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20090731

2007-10-17 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20070817

2000-09-27 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000729

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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