MEMS motion sensor based wave measurement method
A motion sensor and wave technology, applied in the direction of measuring devices, measuring the movement of open-air water sources, instruments, etc., can solve the problems of poor stability and reliability of measurement accuracy, reduced measurement accuracy of buoys, and poor ability of measurement accuracy to resist external factors.
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[0036] Combine below figure 1 A further description of the method of measuring waves based on MEMS motion sensors:
[0037] Firstly, the movement parameters (S1) of the buoy are collected by using the MEMS motion sensor in the buoy to collect the roll angle φ, pitch angle θ, yaw angle ψ of the buoy, and the buoy’s position in the ECEF (Earth-Centered, Earth-Fixed, Earth-Centered, Earth-Fixed) The three-dimensional motion velocity V in the coordinate system 1 , V 2 , V 3 , three-dimensional motion acceleration a 1 、a 2 、a 3 , three-dimensional motion angular velocity A total of 12 buoy motion parameters; then the combination of buoy motion parameters to calculate the original wave direction spectrum (S2) is based on the 12 buoy motion parameters output by the MEMS motion sensor, constructing 7 combinations, the first combination is determined by the three-dimensional motion velocity V 1 , V 2 , V 3 Composition, implement the classic wave spectrum analysis method to fi...
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