Global Patent Index - EP 1039975 A1

EP 1039975 A1 20001004 - PIEZOELECTRIC TRANSDUCER WITH A TEMPERATURE-SENSITIVE COMPONENT

Title (en)

PIEZOELECTRIC TRANSDUCER WITH A TEMPERATURE-SENSITIVE COMPONENT

Title (de)

PIEZOELEKTRISCHER SCHWINGER MIT TEMPERATURABHÄNGIGEM BAUELEMENT

Title (fr)

TRANSDUCTEUR PIEZOELECTRIQUE A COMPOSANT SENSIBLE A LA TEMPERATURE

Publication

EP 1039975 A1 20001004 (DE)

Application

EP 98962248 A 19981103

Priority

  • DE 19756534 A 19971218
  • DE 19820208 A 19980506

Abstract (en)

[origin: DE19820208A1] The invention relates to a piezoelectric transducer of the type used for ultrasound propagation, for example in acoustic flow rate measuring devices or level detecting devices. The inventive piezoelectric transducer preferably consists of a piezoelectric ceramic (1) which has a first electrode (2) on a first surface and a second electrode (6) on a second surface opposite the first. An electrode-free edge area (3) on which a temperature-sensitive component (9) is mounted is provided on the first surface of the piezoelectric ceramic. Said component is conductively connected to at least one of the electrodes (2, 6). The inventive piezoelectric transducer enables temperature to be measured directly at the acoustic measuring point without any additional cabling.

IPC 1-7

B06B 1/06; G01K 7/16

IPC 8 full level

B06B 1/06 (2006.01); G01F 1/66 (2006.01); G01F 23/296 (2006.01); H03H 9/17 (2006.01)

CPC (source: EP)

B06B 1/0651 (2013.01); G01F 1/662 (2013.01); G01F 23/2968 (2013.01); H03H 9/176 (2013.01); H10N 30/802 (2023.02); H10N 30/87 (2023.02); G01F 15/022 (2013.01)

Citation (search report)

See references of WO 9932236A1

Designated contracting state (EPC)

AT BE CH DE DK FI FR GB LI NL SE

DOCDB simple family (publication)

DE 19820208 A1 19990701; DE 19820208 C2 20030828; EP 1039975 A1 20001004; WO 9932236 A1 19990701

DOCDB simple family (application)

DE 19820208 A 19980506; DE 9803300 W 19981103; EP 98962248 A 19981103