Research on the Three-Dimensional Underwater Acoustic Image Measurement Technology Using Planar Array

To measure the spatial distribution of underwater noise sources, three-dimensional underwater acoustic image measurement technology using planar array is researched. Its core algorithm is focus beamforming algorithm. Being different from the conventional planar array beamforming which uses the plane wave compensation algorithm, focus beamforming uses spherical wave compensation. Therefore, it can give not only the noise sources´ azimuths and pitch angles, but also the spatial location coordinates of sources directly. So it can locate the noise sources in three-dimensional. The basic principle of measurement algorithm is given and simulation is done. The results show that the measurement method is feasible.