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 recording device for studying radiated noise of ships was realized. The preprocessing module exploits the principle of zero-crossing detection and amplitude detection to detect the signal, which is not only A / Dless, low-power, but also estimates the noise level. The signal processing module analyzes the noise and records the spectrum. The actual operation results show that the system has the advantages of small size, strong detection capability and long service life.