Underwater three dimensional terrain reconstruction method based on multi-beam sonar data
A three-dimensional terrain and multi-beam technology, which is applied in the direction of sound wave re-radiation, water resource assessment, radio wave measurement system, etc., can solve the problem that there are no set constraints, the underwater three-dimensional terrain cannot be judged whether it is close to the real terrain, and it is difficult to obtain Micro-geomorphological results and other issues, to achieve high precision and improve the effect of spatial resolution
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[0084] Example: The value (%) of the average relative error χ(ρ) between the echo intensity data estimated in this experiment and the collected echo intensity data during the iteration process is: 0.125, 0.079, 0.069, 0.062, 0.070, 0.067, respectively ..., it can be seen that the echo intensity data estimated by this algorithm approaches the true value and gradually stabilizes. This shows that the overall error of the data obtained by this algorithm is small. In order to analyze the details more deeply, three sounding data points with large fluctuations are selected and listed separately: (40, 10), (80, 20), (150, 30). The errors (m) during linear interpolation are 5.9, 7.6, and 5.6, respectively, and the errors (m) after the terrain is reconstructed by the invention are 0.7, 7.1, and 1.8, respectively. It can be seen that this algorithm also has less error than linear interpolation algorithm in the calculation of different data points, and the effect is better.
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