SONDE A BARRETTE COURBE POUR ECHOGRAPHE

PCT No. PCT/FR87/00463 Sec. 371 Date Jul. 17, 1989 Sec. 102(e) Date Jul. 17, 1989 PCT Filed Nov. 24, 1987 PCT Pub. No. WO88/04088 PCT Pub. Date Jun. 2, 1988.A curved bar probe (1) for an echograph is fabricated by using a thin support (2) on which is placed a bar of piezoelectric crystal. The bar is...

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1. Verfasser:	JEAN-FRANCOIS GELLY, RENE REYNIER, PATRICK DUBUT ET CHARLES MAERFELD
Format:	Patent
Sprache:	fre
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR DEAF-AID SETS DIAGNOSIS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY HUMAN NECESSITIES HYGIENE IDENTIFICATION INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS MEASURING MEDICAL OR VETERINARY SCIENCE METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS PUBLIC ADDRESS SYSTEMS SOUND-PRODUCING DEVICES SURGERY TESTING
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Zusammenfassung:	PCT No. PCT/FR87/00463 Sec. 371 Date Jul. 17, 1989 Sec. 102(e) Date Jul. 17, 1989 PCT Filed Nov. 24, 1987 PCT Pub. No. WO88/04088 PCT Pub. Date Jun. 2, 1988.A curved bar probe (1) for an echograph is fabricated by using a thin support (2) on which is placed a bar of piezoelectric crystal. The bar is divided into a plurality of piezoelectric transducers elements (3). The thin support presents the particularity of being rigid at room temperature but is thermodeformable. By subjecting it to a heating-cooling cycle during which it is given a desired curved shape, a rigid bar having an imposed curved shape is obtained. It is then possible to avoid the adhesion of said support to a base (16). This would form a back-reflecting surface for acoustic waves and would create interference harmful to the useful acoustic signal.