Error correction method for marine anemometer

Abstract

The invention discloses an error correction method for a marine anemometer. The method includes the steps of acquiring the three-dimensional ship swing and pitch output by a platform compass or inertial navigation system of a current ship and the three-DOF (degree of freedom) rotation angular speeds of a bow, and recording the rate of changes over time of the three angular speeds; determining a motion central point of three DOF of the current ship, and determining the geometric distance from the central point to the marine anemometer; calculating linear speeds (tangential speeds), in the distance of the anemometer corresponding to the three DOF, and corresponding directions; subjecting the three-DOF linear speeds and corresponding directions to vectorial resultant to obtain a direction and speed value each time, for a three-dimensional anemometer height corresponding to the platform compass data, and determining the direction and speed value as a measurement error caused by the ship swing and pitch and the rotation of the bow; subtracting error vector wind by a direction and speed vector measured by a ship-borne weather instrument so as to obtain corrected true speed and direction.

Description

technical field [0001] The invention relates to an error correction method for a ship's wind direction and anemometer. Background technique [0002] Sea surface meteorological observation is an important means of monitoring changes in marine weather systems. Since the global ocean area accounts for 70% of the total area, and most weather systems come from tropical oceans, the scope of ocean and sea surface meteorological observations is required to be large. However, there are very few islands on the sea, and it is impossible to set up stations for meteorological observation in a large area, so the ship weather report is the only effective means of observation. However, due to the different effects of the hulls of various ships on the wind and waves during the process of strong wind and waves, the resulting measurement and observation errors are huge, and even cannot be used effectively. Not to mention precise usage. In particular, the size of the hull is different, the t...

AI Technical Summary

Problems solved by technology

[0003] The existing ship meteorological and hydrological observations in the world do not consider the ship's response to the ship's hull response during the wind and wave process, such as the pitching and bow rotation of the ship, resulting in the error of the ship's weather report information.

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