公开(公告)号：US07457197B1

公开(公告)日：2008-11-25

申请号：US07566700

申请日：1990-07-26

Applicant: Alan T Parsons

Inventor： Alan T Parsons

IPC: G01S3/801

CPC classification number: G01V1/201 ,  G01S3/801 ,  G01S7/52003 ,  G01S7/52004 ,  G01S7/521 ,  G01S7/527 ,  G01V1/3808 ,  G10K11/341 ,  Y10S367/901

Abstract: Low frequency vibration induced noise is reduced in a towed sonar array of the type comprising a number of oil-filled modules joined end to end with each module housing a plurality of hydrophones by arranging that the signal output from each hydrophone in an array is equally weighted at low frequencies to form a single channel. Beamforming is then carried out by applying different weights to the different module channels. High modulus internal strength members are included in each module to resist anti-phase vibration of the couplings at the end of the module. The hydrophone spacing and the coupling lengths are both made small compareed to the module length to improve vibration noise reduction.

Abstract translation: 拖曳声纳阵列的拖曳声纳阵列减少了低频振动引起的噪声，其中包括多个充油模块，其端接到端连接，每个模块通过安排阵列中每个水听器输出的信号被均等地加载多个水听器 在低频处形成单通道。 然后通过对不同的模块通道应用不同的权重来进行波束形成。 每个模块都包括高模量内部强度部件，以抵抗模块末端的联轴器的相位振动。 与模块长度相比，水听器间距和耦合长度都小，以改善振动噪声的降低。