EP 0162515 B1 19900808 - ULTRASONIC TRANSDUCER DEVICES USING AN ARRAY OF PIEZOELECTRIC TRANSDUCER ELEMENTS
Title (en)
ULTRASONIC TRANSDUCER DEVICES USING AN ARRAY OF PIEZOELECTRIC TRANSDUCER ELEMENTS
Publication
Application
Priority
FR 8407957 A 19840522
Abstract (en)
[origin: US4603276A] An ultrasonic transducer comprising a network of parallel piezoelectric transducer elements having a width W or in the form of a parallelepipedon having a length H and a width W, characterized in that the thickness T of the said transducer elements is equal to half the wavelength corresponding to a frequency F which is equal to the average value of at least two of the successive piezoelectric resonance frequencies of the piezoelectric material concerned, the products of the thickness and the resonance frequencies framing at least two successive vibratory modes of this material in the bidimensional diagram of the curves FxT=f(W/T) of the spread of the resonance frequencies relating to the piezoelectric material concerned or in the tridimensional diagram of the curves FxT=f(W/T, H/T).
IPC 1-7
IPC 8 full level
B06B 1/06 (2006.01); G01N 29/04 (2006.01); G01N 29/24 (2006.01); H04R 17/00 (2006.01)
CPC (source: EP US)
B06B 1/0622 (2013.01 - EP US)
Citation (examination)
- Proc IEEE, 1983, Ultrasonics Symposium, Atlanta, pp. 773-777
- Acta Electronica, 25, 4, 1983, pp. 325-340
Designated contracting state (EPC)
BE DE FR GB SE
DOCDB simple family (publication)
EP 0162515 A1 19851127; EP 0162515 B1 19900808; CA 1230409 A 19871215; DE 3579039 D1 19900913; FR 2565033 A1 19851129; FR 2565033 B1 19870605; IL 75246 A0 19850929; IL 75246 A 19881115; JP H0695088 B2 19941124; JP S60260849 A 19851224; US 4603276 A 19860729
DOCDB simple family (application)
EP 85200735 A 19850510; CA 481627 A 19850515; DE 3579039 T 19850510; FR 8407957 A 19840522; IL 7524685 A 19850520; JP 10920985 A 19850521; US 73438085 A 19850515