一种船舶辐射噪声自动检测系统的实现

Realization on an Automatic Detection System of Ship Radiated Noise

实现了一种用于研究船舶辐射噪声的自动探测和记录装置。由预处理模块利用过零检测和幅度检测原理探测信号，它不仅是无Ａ／Ｄ、低功耗的，而且能估算出噪声强度。信号处理模块分析噪声并记录频谱。实际运行结果表明，该系统具有体积小、检测能力强和寿命长等优点。

An automatic detection and record system for the research of the ship radiated noise is presented. Based on zero crossing and limited amplitude detection theory, the pretreatment part, with low power consumption and without A/D converter, can not only detect the ship radiated noise but also estimate its acoustic intensity. The radiated noise can be analyzed and its spectrum recorded by signal processing part. Experimental results indicate that this system has such advantages such as small size, reliable detection ability and long service time, etc.