EP 1432530 A1 20040630 - DEVICE AND METHOD FOR PRODUCING HIGH-PRESSURE ULTRASONIC PULSES
Title (en)
DEVICE AND METHOD FOR PRODUCING HIGH-PRESSURE ULTRASONIC PULSES
Title (de)
VORRICHTUNG UND VERFAHREN ZUR ERZEUGUNG VON HOCHDRUCKULTRASCHALLIMPULSEN
Title (fr)
DISPOSITIF ET PROCEDE DE PRODUCTION D'IMPULSIONS ULTRASONORES DE FORTE PRESSION
Publication
Application
Priority
- FR 0203390 W 20021004
- FR 0112774 A 20011004
Abstract (en)
[origin: WO03028904A1] The invention concerns a device for producing high-pressure ultrasonic pulses comprising an ultrasound source including a piezoelectric transducer (2) provided with electrodes (3) and having a polarizing direction (f1), and means (4) for applying an electric voltage on the electrodes (3) of the ultrasonic transducer (2), providing for producing an ultrasonic emission: application of an electric field with direction (f2) opposite to the polarizing direction (f1), then application of a transitory electric field in the same direction as that of the polarizing direction (f1). The invention is characterized in that the means (4) apply a gradual electric voltage with a build-up time to create an electric field with direction (f2) opposite to that of the polarizing direction (f1), for a duration less than that resulting in depolarization of the piezoelectric transducer.
IPC 1-7
IPC 8 full level
G01N 29/24 (2006.01); A61B 17/22 (2006.01); B06B 1/02 (2006.01); B06B 3/04 (2006.01); H02N 2/00 (2006.01)
CPC (source: EP US)
B06B 1/0215 (2013.01 - EP US)
Citation (search report)
See references of WO 03028904A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03028904 A1 20030410; AT E294028 T1 20050515; CN 1326634 C 20070718; CN 1564717 A 20050112; DE 60203922 D1 20050602; DE 60203922 T2 20060216; EP 1432530 A1 20040630; EP 1432530 B1 20050427; FR 2830468 A1 20030411; FR 2830468 B1 20040220; IL 161254 A0 20040927; IL 161254 A 20071203; JP 2005503921 A 20050210; JP 2009022012 A 20090129; JP 5280761 B2 20130904; US 2004254506 A1 20041216; US 7264597 B2 20070904
DOCDB simple family (application)
FR 0203390 W 20021004; AT 02793156 T 20021004; CN 02819713 A 20021004; DE 60203922 T 20021004; EP 02793156 A 20021004; FR 0112774 A 20011004; IL 16125402 A 20021004; IL 16125404 A 20040401; JP 2003532216 A 20021004; JP 2008183834 A 20080715; US 49148004 A 20040721