Application of multi-beam in underwater pile point cloud acquisition
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.
multibeam bathymetric system(MBS)surveying line layoutK-means++point cloud segmentation
万方数据
维普
