Research on multi-beam line measurement based on differential algorithm

This paper focuses on modeling, solving and correlation analysis of multi-beam line coverage width, slope Angle and overlap ratio between adjacent strips. Aiming at the relationship between the two-dimensional plane overlap rate and the coverage width, based on the sine theorem, the relationship between the seawater depth D and the distance between the measurement line and the center point and the coverage width are obtained, and the calculation overlap rate is obtained. According to the coverage width of the survey line on the three-dimensional plane, the relationship between the slope Angle r and the slope bottom Angle
$\alpha$
., and the Angle
$\beta$
projected on the horizontal plane between the survey line direction and the submarine slope normal, the coverage width under different b and different surveying ships is calculated. Based on the above research, the relationship among the coverage width, side line spacing and overlap rate is derived for the design of line direction in 3D plane. Three representative survey line directions are designed, and the one with the shortest measurement length that can cover the whole sea area to be measured is selected. Aiming at the direction design of a certain sea area, the irregular slope of the sea area is transformed into a smoother slope by differentiating. Based on the direction design of the measurement line of the three-dimensional plane, the direction of the measurement line is determined, and the seawater depth, covering width and average covering width are calculated. By establishing the relationship between the average coverage width and
$\alpha.$
, the total length of the measured line is
$6.1288\times 10^{\wedge}5$
meters. Using Delaunay triangulation and triangle area algorithm, the slope area was calculated and the percentage of the missing area in the total area was 0.03391%.