A flexible line array transducer assembly for detecting underwater acoustical signals. The assembly includes an array of spaced-apart piezoelectric elements (4) arranged generally in a line and selected to have low cross-coupling characteristics, low sensitivity to incoherent mechanical perturbations in the directions longitudinal and lateral to the axis of the array, and high sensitivity to coherent mechanical perturbations such as acoustical signals. The elements (4) are polarized in a direction generally transverse to the array and each include opposing surface areas which are generally parallel with the linear axis of the array. Electrodes (28, 32 etc.) are disposed on the opposing surface areas of the elements and are coupled to conductors (20, 24) which carry signals produced by the piezoelectric elements (4) when the elements are stressed by acoustical signals. A porous, open-cell material (8) is disposed about the piezoelectric elements (4) as an encasement to maintain the elements in place and mechanically isolate the elements. An outer, water-tight jacket (16) encloses the open cell material and holds a fill fluid carried within the open-cell material. An electically conductive flexible sleeve (12) may be placed either about the open-cell material or about the outer jacket to shield the piezoelectric elements from electromagnetic waves.
一种用于检测
水下声学信号的柔性线阵列换能器组件。该组件包括一排间隔排列的压电元件(4),通常排列成一条线,并且选择具有低交叉耦合特性,对于沿着阵列轴线纵向和横向的非相干机械扰动具有低灵敏度,对于相干机械扰动(如声学信号)具有高灵敏度。元件(4)在通常与阵列横向相对的方向上极化,并且每个元件包括与阵列线性轴线大致平行的相对表面区域。电极(28、32等)位于元件的相对表面区域上,并与传导体(20、24)耦合,传导体携带由压电元件(4)在受到声学信号的应力时产生的信号。多孔、开孔材料(8)被置于压电元件(4)周围作为外壳,以保持元件的位置并机械隔离元件。外部的防
水夹克(16)包裹开孔材料,并容纳在开孔材料内携带的填充液。电导性柔性套管(12)可以放置在开孔材料或外夹克上,以屏蔽压电元件免受电磁波的影响。