| 夏显文,戴光耀,金程晞.多波束在水下桩体点云获取中的应用[J].水运工程,2024,(10):212-217 |
| 多波束在水下桩体点云获取中的应用 |
| Application of multi-beam in underwater pile point cloud acquisition |
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| DOI： |
| 中文关键词: 多波束测深系统 测线布设 K-means++ 点云分割 |
| 英文关键词:multibeam bathymetric system (MBS) surveying line layout K-means++ point cloud segmentation |
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| 中文摘要: |
| 随着装配式码头工程的增加，水下桩体的安放状态正成为关注的焦点。然而，由于受海水隔断，高效、低成本、高精度的桩体状态监测方法相对较少。因此，本文提出利用多波束获取水下桩体点云方法，主要包括GNSS RTK多波束测深技术，顾及桩体形态、分布和多波束测量原理的多波束测线布设方法，基于K-means++的桩体点云具备聚类方法以及桩体形状、回波强度阈值约束的桩体点云分割和滤波方法。实际应用结果表明：基于该方法可以获取高精度桩体点云，得到桩体的状态参数，取得桩体中心坐标x和y方向偏差小于5 cm、半径偏差小于4.5 cm的精度，验证了该方法的正确性和有效性。 |
| 英文摘要: |
| With the increase of prefabricated docks projects,the placement state of underwater piles is becoming the focus of attention.However,due to the isolation by seawater,there are relatively few efficient,low-cost and high-precision methods for monitoring the condition of piles.This paper proposes a method to obtain underwater pile point cloud by using multi-beam bathymetric system (MBS),which includes the GNSS RTK multi-beam sounding technology,the survey line layout taking into account the shapes and distributions of underwater piles and MBS measurement principle,and the clustering point cloud of the monitored pile by K-means++and the pile point cloud segmentation and filtering by considering the pile shape and MBS backscatter strength.The practical application results show that based on this method,the high-precision point cloud of the pile can be obtained,the state parameters of the pile are obtained,and the accuracy of the deviation in the x and y directions of the pile center is less than 5 cm,and the radius deviation is less than 4.5 cm,which verifies the correctness and effectiveness of this method. |
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