Abstract
Multi-beam sounding technology can provide higher spatial resolution than single-beam sounding by transmitting fan-shaped acoustic signals from the transducer of a survey ship along the normal plane of the survey line to measure the sea depth. It is of great significance to study the line design scheme of multi-beam sounding for uneven seabed topography to improve the efficiency of underwater terrain mapping. This paper mainly studies the optimization of multi-beam sounding line under ideal slope. Firstly, a single angle model of ideal slope is established, and the flat seabed overlap ratio formula is extended to slope seabed to calculate the coverage width of beam sounding. Secondly, an angle model of ideal slope is established to calculate the corresponding coverage width under different positions of the slope sea area. Finally, the optimal routing model of ideal slope is established. The design scheme of the local optimal survey line is obtained through comprehensive analysis. In engineering practice, the optimal routing of real terrain can be solved by using the ideal slope optimal routing model through the idea of plane approximation, which provides a new idea for the optimal route selection of underwater terrain mapping.
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