Wave buoy dominant wave direction calculation method based on wave energy weighting

Abstract

The invention relates to a method for calculating the main wave direction of a wave buoy based on wave energy weighting. The method comprises the steps of reading original data measured by the buoy, performing wave division according to an upper crossing zero point, calculating corresponding wave period values, counting the number of wave periods, and calculating the wave height of each wave period; for the segmented wave period, calculating the wave direction of a single wave in the period by using information measured by a buoy at a lower crossing zero point, so as to obtain all the wave directions of the single wave; counting the number of single waves appearing in the wave direction in each angle interval, and further obtaining a wave direction appearing rate; and selecting an angle interval where the maximum wave direction occurrence rate is located, calculating the wave energy of each wave in the interval, and carrying out weighted vector average processing by taking the obtained wave energy as a weight so as to calculate the main wave direction. Based on the leading effect of wave energy on wave motion, the influence of the wave energy on wave direction measurement is fully utilized, so that a more accurate main wave direction is obtained, and the accuracy of wave direction measurement is improved.

Description

technical field [0001] The invention belongs to the technical field of marine monitoring. Background technique [0002] Developing and exploiting the ocean is a strategic choice of many coastal countries in the world, and our country is also working hard to conduct research on ocean monitoring technology. At present, there are more and more research topics and seminars on improving ocean monitoring technology. 319) proposed that wave direction information measurement has always been a key and difficult issue in improving ocean monitoring technology [0003] At present, there are mainly two types of methods for wave direction data observation at home and abroad: the first type uses remote sensing technology, and the representative one is to use X-band marine radar wave echo inversion to calculate wave direction and other information. The reference "Acurvelet-based method to determine wave directions from nautical X-band radar images” (Guozhen, Qingyou, GUAN, et al. ActaOcea...

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Problems solved by technology

[0007] For buoys with the second type of working principle abroad, the method of measuring wave direction that can be found from public literature is basically the same as that of the above-mentioned domestic related literature. Research work on wave direction measurement with heel and pitch sensors, but no specific algorithm has been published, see reference "Theory and application of calibration techniques for an NDBC directional wave measurements buoy" (Steele K, Lau J, Hsu Y H. IEEE Journal of Oceanic Engineering, 1985, 10(4): 382-396.)

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