聚焦波束形成声图法误差分析

Error analysis of the underwater imaging method using focused beamforming

聚集波束形成声图测量方法可以实现近场目标的被动定位,利用该方法接收数据或进行数据处理的过程中必定会有各种误差产生,本文从聚焦峰尺度、阵元偏差、波长等方面对聚焦波束形成声图测量方法的影响进行了分析,经仿真研究与实验数据分析可以得出聚焦波束形成声图法受距离与波长的影响较大,但对于阵元的位置要求不高,利用该方法可以实现近程目标的高精度定位。

The method of measuring underwater image by focused beamforming can be used for passive localization in short range. It is sure that many kinds of errors exist in the process of receiving data or carrying out data processing with this method. From the analysis of focusing apex scale, the influences of array element deviation, distance and wavelength on the underwater imaging method using focused beamforming are discussed in this paper. Simulation study and experimental data analysis indicate that the locating precision of this imaging method is sensitive to distance and wavelength, but not so to the array element position. Therefore the focused beam-forming technique can realize high precision localization in short range.