为了解决测量水下动目标辐射噪声的低频线谱分量,采用海底锚定式系统是最适宜的。由于水下动目标的辐射噪声动态范围很宽,它使系统的实现变得困难。本文所介绍的自动量程切换,使系统能自适应水下动目标辐射噪声强度的变化,理论上它可适应“任意大”的动态范围。本文还讨论了在量程切换过程中,系统放大量的确定,从而为事后分析提供了可靠的依据。本文不仅从原理上作了阐述,还给出了相应的电原理图,并作了抗干扰的讨论,相信会对这方面的工作有所裨益。 In order to solve the low-frequency line spectral component of underwater radiated noise measurement, it is most suitable to adopt the submarine anchor system. Due to the wide dynamic range of the radiated noise of underwater moving targets, it makes the realization of the system difficult. The automatic range switching introduced in this paper enables the system to adapt to changes in the radiated noise intensity of underwater moving targets. In theory, it can accommodate “any large” dynamic range. This article also discusses the determination of system magnification in the process of range switching, which provides a reliable basis for the post-analysis. This article not only explains the principle, but also gives the corresponding electrical schematic diagram, and made a discussion of anti-interference, I believe this work will be beneficial.