Experiential Study of Measurement Comparison between Ocean Buoys and Wave Gauges in Large Wave Flume

Abstract

The actual wave flow condition is difficult to control, so the real measurement accuracy of ocean wave buoy has not been verified. Based on the above background, this experiment conducted comparison test on two kinds of ocean wave buoys in the large-scale wave flume laboratory. Based on regular waves and under different conditions of period, velocity and wave height, the wave height measured by the 2m capacitive wave height meter was compared with the measured wave surface data by the buoy. The experimental results show that the relative error of wave height of SBF6-1 and SBF3-2 buoys is 1.2%∼15% and 2.5%∼14.2%. According to the results of spectrum comparison, the spectrum peak frequency of buoy and wave height instrument is relatively consistent under the same working conditions, but the difference of wave energy density at the spectrum peak frequency is obvious and the error range is 14%∼30%.