公开(公告)号：US4991152A

公开(公告)日：1991-02-05

申请号：US380478

申请日：1989-07-07

申请人： Michel Letiche

发明人： Michel Letiche

IPC分类号： B06B1/06

CPC分类号： B06B1/0618

摘要： This electroacoustic transducer has a structure of the so-called "Tonpilz" general type, i.e., comprising a radiating horn, a rear mass and a motor formed by at least one piezoelectric element interposed between said horn and said rear mass, and electrically excited so as to produce a vibration transmitted to the horn. Said piezoelectric element is submitted to an electric field with a direction perpendicular to the main direction of polarization of said piezoelectric material so as to stress the latter in the shear mode. Said horn and rear mass are terminated one in the form of a foot and the other in the form of a U accommodating said foot between rectilinear arms, the foot and arms extending parallel to the longitudinal direction of the transducer, and said motor being formed by substantially parallelepipedal piezoelectric elements disposed between the facing sides of said foot and of each arm, these elements being fitted with electrodes creating an electric field parallel to said longitudinal direction, and the shape of said piezoelectric elements being chosen so as to promote the strain of the piezoelectric material substantially in this longitudinal direction. This configuration allows to considerably lower the resonant frequency of the assembly with moderate overall size and weight and with a small volume of piezoelectric material.

摘要翻译： 该电声换能器具有所谓的“Tonpilz”一般型的结构，即包括辐射喇叭，后质量体和由置于所述喇叭和所述后质量块之间的至少一个压电元件形成的电动机，并被电激励 以产生传递到喇叭的振动。 所述压电元件以与所述压电材料的主要偏振方向垂直的方向进行电场，以在剪切模式下对其施加应力。 所述喇叭和后质量以脚的形式被终止，而另一个以U形式容纳所述脚的直线臂之间，所述脚和臂平行于换能器的纵向方向延伸，并且所述电动机由 设置在所述脚和每个臂的相对侧之间的基本上平行六面体的压电元件，这些元件装配有产生平行于所述纵向方向的电场的电极，并且所述压电元件的形状被选择为促进 压电材料基本上在该纵向方向上。 该配置允许显着地降低组件的谐振频率，具有适度的整体尺寸和重量以及小体积的压电材料。

公开(公告)号：US4970706A

公开(公告)日：1990-11-13

申请号：US430574

申请日：1989-11-01

申请人： Bernard Tocquet ,  Michel Letiche

发明人： Bernard Tocquet ,  Michel Letiche

IPC分类号： B06B1/06 ,  G10K9/12

CPC分类号： G10K9/121 ,  B06B1/0618

摘要： The disclosed flextensor transducer enables the transmission and reception of acoustic waves in water at very great depths. It includes at least one pillar of piezoelectrical cells placed within an impervious shell. Each pillar is supported solely by a first end on the shell, and is compressed on the shell by a counter-mass applied to its second end.

摘要翻译： 所公开的柔性传感器能够在非常大的深度的水中传输和接收声波。 它包括放置在不透水壳体内的至少一个压电电极柱。 每个支柱仅由壳体上的第一端支撑，并且通过施加到其第二端的反质量体在壳体上被压缩。

公开(公告)号：US06515940B2

公开(公告)日：2003-02-04

申请号：US09864313

申请日：2001-05-25

申请人： Vito Suppa ,  Michel Letiche ,  Michel Lattard

发明人： Vito Suppa ,  Michel Letiche ,  Michel Lattard

IPC分类号： H04R1700

CPC分类号： G10K11/006 ,  B06B1/045

摘要： Disclosed is an electrodynamic transducer designed to emit acoustic waves in a sea environment while being capable of withstanding external explosions. The lower pole piece of such a transducer is drilled with vertical holes enabling air to circulate inside the transducer in order to efficiently cool the coil that makes it work. Light metal masses that are good heat conductors, attached between the magnets which excite the pole pieces, furthermore drain the heat out of the transducer. The efficiency of such a transducer is increased by at least 4.