Wave buoy dominant wave direction calculation method based on mean shift clustering algorithm

Abstract

The invention belongs to the technical field of ocean monitoring, and particularly relates to a wave buoy dominant wave direction calculation method based on a mean shift clustering algorithm. The method comprises the following steps: reading a group of continuous original data measured and recorded by a buoy, and carrying out outlier detection on original trim angle and heeling angle data by utilizing an outlier detection algorithm based on mean shift clustering without specifying the number of clusters in advance; processing the detected outliers by adopting an outlier correction method; dividing wave periods by using an upper-span zero point, and determining the number of the wave periods; selecting a sampling point interval for calculating the wave direction of a single wave, and calculating the instantaneous wave direction of each sampling point in the interval and the wave direction of the single wave; counting the counting proportion of the wave direction measurement result of a single wave in 16 angle intervals; and selecting the median of the angle interval with the maximum counting proportion value as the main wave direction. According to the method, the outliers in the inclination angle data are detected and processed, so that the influence of the outliers on wave direction measurement is eliminated, and the wave direction measurement accuracy of the buoy is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of marine monitoring. Background technique [0002] Ocean waves play a leading role in many marine environmental factors. Ocean waves are a kind of fluctuation phenomenon that occurs on the ocean surface, and are the most important and complex natural phenomenon among the elements of ocean monitoring. Therefore, the development and development of the ocean has become a strategic choice for many coastal countries in the world. Ocean wave monitoring is one of the important tasks for human beings to understand, research, develop and utilize the ocean. Modern navigation, shipbuilding, military affairs, marine engineering, disaster monitoring and early warning and other fields all need to obtain high-precision real-time wave data, which is used to describe the quantity of wave characteristics. , such as wave height, wave direction, period, phase velocity, wavelength, etc., are collectively referred to as wave el...

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Problems solved by technology

By comparison, the domestic wave direction measurement method for the second type of principle buoy is similar to the Kenneth Steele method, but the current domestic wave direction measurement method has not conducted in-depth research on the outliers that appear in the wave buoy work. Therefore, the domestic wave buoy measured Compared with the real wave direction, the wave direction has a large error

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