声场是舰船重要的物理场.但是对于低速出港的舰船,由于受到港口和船坞噪声等的影响,其信号几乎完全淹没在环境噪声当中.此时,传统的方法已很难检测到目标是否存在.本文针对低速出港舰船信号难以检测的问题,通过分析入耳听测原理,提出了一种模仿生物听力的低速舰船目标信号检测的模型,最后利用某次海试数据对检测方法进行分析和研究.结果表明,在利用积分梳状滤波器对舰船信号进行滤波的情况下,可显著提高信噪比,增强对目标的检测能力.%Acoustic field is an important physical field of ships. But, because of the noise form both ports and docks, the low speed leaving port ships' signal is nearly annihilated by noise. At this moment, traditional methods can hardly detect the existence of the target. Aim at detecting the low speed leaving port ships, this passage makes an analysis on human hearing principle firstly, then designs a model of using CIC to detect the low speed ship target based on imitating biologic hearing, at last, proves the method with actual acoustic signals. The result shows,using the CIC to filtrate sound signal of low speed ships can advance the SNR and reinforce the detecting capacity evidently.
展开▼
