水下目标噪声测量中的同步钟测距

本测距系统采用两只型号相同的ＷＺＧ－５ＭＨｚ石英晶体振荡器，在同一个时基标准下进行同步测距，５ＭＨｚ石英晶体振荡器具有准确度高，稳定性好的特点，从而成功的解决了在舰船辐射噪声测量中，目标船与测量水听器间测距误差大的问题。本文较详细的介绍了同步钟测距原理，并对在舰船辐射噪声测量中噪声级与距离关系，目标船相对测量水听器的位置，测距误差等进行了描述。

The synchronous-clock distance measurement system for measuring under-water target noise

The distance measurement system makes use of two crystal oscillators of the same type WZG-5MHz so that the distance is measured synchronous by under the same time standard. The oscillators have high accuracy and stability. The system thus successfully solves the problem of high error in measuring distance between the target ship and the measuring hydrophone in ship radiation noise measurement.This paper details the synchronous clock principle. Also described are the relationship between the noise level and the distance, the position of the target ship to the hydrophone and errors of distance measurement.