ELECTROACOUSTIC TRANSDUCER

The inventive electroacoustic transducer comprises a body (1) provided with a magnetic system which is disposed therein and formed by at least three constant magnets (5, 6) having a substentially rectangular cross-section and arranged in such a way that they are immediately adjacent to each other an...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SMIRNOV, ANDREI YUREVICH, KALACHEV, NIKOLAI VALENTINOVICH, SOKOLOV, MIKHAIL VLADIMIROVICH, KIRIKOV, ANDREI VASILIEVICH, PASHNIN, VYACHESLAV VLADIMIROVICH
Format:	Patent
Sprache:	eng ; fre ; rus
Schlagworte:	FOR PERFORMING MECHANICAL WORK IN GENERAL GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY PERFORMING OPERATIONS PHYSICS TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	The inventive electroacoustic transducer comprises a body (1) provided with a magnetic system which is disposed therein and formed by at least three constant magnets (5, 6) having a substentially rectangular cross-section and arranged in such a way that they are immediately adjacent to each other and are parallel to a working surface (4). The central magnet (5) has a vertical polarisation with respect to said working surface (4) and the side magnets (6) have a horizontal polarisation and are oriented towards the central magnet by poles which are analogous to the pole by which the central magnet (5) is oriented towards the working surface (4). Concentrators (7) are placed remotely with respect to each other and adjoined to the nearest, in relation to the working surface, surface of the central magnet pole. Inductance coils (8) are mounted under said concentrators. The magnets can be shaped in the form of a rectangular parallelepiped or a ring and embodied in the form of constant magnets or electromagnets, i.e. solenoids. Le transducteur électromagnétique / acoustique de l'invention comprend un corps (1) contenant un système magnétique formé par au moins trois aimants permanents (5, 6) sensiblement rectangulaires en coupe transversale, qui sont montés adjacents parallèlement à la surface de travail (4), l'aimant central (5) ayant une polarisation verticale par rapport à la surface de travail (4), et les aimants latéraux (6) ayant une polarisation horizontale et étant orientés vers l'aimant central par leurs pôles ayant le même signe que le pôle de l'aimant central (5) orienté vers la surface de travail (4). Des concentrateurs (7), adjacents à la surface de l'électroaimant qui est proximale à sa surface de travail, sont disposés à une certaine distance les uns des autres, et des bobines d'induction (8) sont montées en dessous de ces concentrateurs. Les aimants peuvent avoir la forme de parallélépipèdes rectangulaires ou d'anneaux et être des aimants permanents ou des électroaimants (solénoïdes).