一、前言固定在近海海床上的无源声检测系统对秘密的远程监视具有显而易见的优点。这些系统可按其在海床上的配置方式及其声学环境进行分类。配置方式系统中的水听器可按“绊网”的方式排列,在每个传感器之间有一定的间隔,其间距随预计的目标强度和环境噪声最低限度而定。或者与之相反过来,即把多只水听器分成组,形成一个相控阵列,其间距大约为声频带中最长波长之一半。一般来说,在后一种配置方式中,由于采用组合式传感器,所以方向性得到了改善,故可以监听到较远距离的声目标,并且在许多情况下,还是解决检测问题最好的经 I. INTRODUCTION The passive acoustic detection system fixed on the seabed in the open sea has the obvious advantage to the remote monitoring of the clandestine. These systems can be classified according to their placement on the seabed and their acoustic environment. Configurations The hydrophone in the system can be arranged in a “tripwire” fashion with a certain separation between each sensor with a minimum distance between the expected target intensity and the ambient noise. Or, conversely, dividing multiple hydrophones into groups creates a phased array with a pitch of about half the longest wavelength in the acoustic band. In general, in the latter configuration, since the combination sensor is used, the directivity is improved so that the acoustic target at a longer distance can be monitored and in many cases the best solution to the problem of detection