基于多元协同测深技术的复杂水域水下地形测量

Underwater terraine mapping based on multivariate collaborative technology under complex water conditions

为提高复杂水域水下地形地貌测量精度,提出基于多元协同测深技术的复杂水域水下地形测量方法。该方法首先利用多波束大面积普查获得高精度点云,对点云进行高程赋色并发现异常区,然后利用侧扫声呐对异常区进行重点排查并构建二维影像,最后结合多波束点云,构建水下构筑物的精细化纹理模型。以武汉市天兴洲大桥下游试验区域为例利用该方法展开了实例分析。结果表明:协同运用多波束精密测深与侧扫声呐高清摄像的方法可清晰观察水下构筑物的形态特征,获取水下地形的丰富信息。

To improve the accuracy of underwater terraine mapping under complex water conditions,the paper proposed a method of bathymetry survey based on multivariate cooperative bathymetry.By using the method,high-precision point clouds were obtained by multi-beam large-area survey,and the abnormal areas were identified by altitude coloring of point clouds.Then the side-scan sonar was used to focus on abnormal areas to screen and construct two-dimensional images.Finally,a fine-grained texture model of underwater structures was constructed by combining multi-beam point clouds.The downstream test area of Tianxingzhou Bridge in Wuhan was taken as an example.The results showed that the morphological characteristics of underwater structures could be clearly observed and abundant information of underwater terrain could be obtained by using the method of multi-beam precision sounding and side scan sonar high-definition photography.