Research on the Multibeam Bathymetry Problem in Uneven Seabeds Based on Computational Geometry
DOI:
https://doi.org/10.54097/fhj6sd62Keywords:
Multibeam bathymetry, Computational Geometry, Sensitivity Analysis.Abstract
The principle of the multibeam seabed bathymetry system involves emitting dozens to hundreds of beams at once in a plane perpendicular to the course, and then receiving the acoustic waves returned by the seabed through the receiving transducer. This paper will study through computational geometry how to calculate information such as seabed depth, survey line coverage width, and the overlap rate between survey lines based on the received information in uneven seabed areas. This study first discusses the special case where the survey line is parallel to the contour line, defining coverage width and overlap rate. It then uses the sine theorem and triangle solving to calculate physical quantities such as seawater depth, coverage width, and overlap rate with the previous survey line when the seabed has a slope. Sensitivity analysis is conducted from three aspects: depth, slope, and opening angle. This research continues to discuss the general case where the survey line is not parallel to the contour line. By first calculating the angle between the intersection line generated by the seabed section detected by the vessel and the seabed slope surface and the horizontal plane, the problem is transformed into the model under the parallel situation to continue the calculation and solve the coverage width. The study of multibeam bathymetry in uneven seabeds using computational geometry enables the application of multibeam bathymetry in uneven seabed areas, providing a simple calculation method for the field of bathymetry in uneven seabeds and expanding the application conditions of multibeam bathymetry.
Downloads
References
QIN Chaojie YAO Rui. Application of multi-beam technology in underwater topographic survey of Huaihe River Basin[J].Water Resources Informatization,2023(02):61-64.DOI:10.19364/j.1674-9405.2023.02.012.
CHENG Fang,HU Youcheng. Research on the Optimization Method For Survey Line Layout In Multi Beam Survey[J].Ocean Technology,2016,35(02):8791.
Wang J ,Tang Y ,Jin S , et al. A Method for Multi-Beam Bathymetric Surveys in Unfamiliar Waters Based on the AUV Constant-Depth Mode[J]. Journal of Marine Science and Engineering,2023,11(7).
Aniol M ,Jordi P ,David A , et al. Compression of Multibeam Echosounders Bathymetry and Water Column Data[J]. Remote Sensing,2022,14(9).
Qiang G , Chuanyu F ,Yikang C , et al. Application of multi-beam bathymetry system in shallow water area[J]. Journal of Physics: Conference Series,2023,2428(1).
WANG Junsen ,JIN Shaohua, BIAN Zhigang, et al. Residual Correction of the Rolling Motion in Multibeam Bathymetry Using Overlapping Area of Adjacent Survey Lines[J].Ocean Technology,2023,42(04):35-42.
LIU Lin.Reasons and Solutions for the Distortion of Multibeam Sounding Data[J].Value Engineering,2023,42(21):125-128.
DONG Yu. Research on the Application of Multibeam Bathymetry System in Marine Hydrographic Survey[J].Engineering Technology Research,2023,8(15):122-124.DOI:10.19537/j.cnki.2096-2789.2023.15.040.
MA Zhenghai LIN Dang LI Shengxuan, et al. Underwater terrain mapping of Jingjiangmen river reach based on multi-beam bathymetry system[J].Express Water Resources & Hydropower Information,2022,43(12):36-40.DOI:10.15974/j.cnki.slsdkb.2022.12.006.
Grządziel A . Method of Time Estimation for the Bathymetric Surveys Conducted with a Multi-Beam Echosounder System[J]. Applied Sciences,2023,13(18).
Downloads
Published
Conference Proceedings Volume
Section
License
Copyright (c) 2024 Highlights in Science, Engineering and Technology
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.