Title:
【発明の名称】所定波形を有した弾性パルス発振器及びその医療診断又は処理への応用
Document Type and Number:
Japanese Patent JP2578638
Kind Code:
B2
Abstract:
Generator for elastic pulses comprising a piezoelectric transducer (17) or magnetostriction transducer focusing or associated with focusing means, having a plurality of emitting surface elements (18) generating elastic signals which become superimposed, after propagation over a certain distance, in a focal region, and means (19) for exciting periodically, at a determined rhythm, several groups of surface elements (18) with short and distinct electrical signals respectively, characterised in that the said emitting surfaces (18) belong to transducing elements which are electrically insulated from one another and have different transfer functions, and in that means are provided for phase shifting of the elastic signals emitted by the transducing elements (delay lines 20-21-22).
Inventors:
JATSUKU DOORII
Application Number:
JP10742588A
Publication Date:
February 05, 1997
Filing Date:
April 28, 1988
Export Citation:
Assignee:
EDA INTERN
International Classes:
A61B8/00; A61B18/00; B06B1/02; B06B1/06; G10K11/34; H04R3/00; H04R15/00; H04R17/00; (IPC1-7): B06B1/02; A61B8/00; A61B17/36; H04R3/00; H04R15/00; H04R17/00
Domestic Patent References:
| JP56103598A | ||||
| JP56100048A | ||||
| JP6242773A | ||||
| JP5962040A |
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)