水表面波微振幅测量

MEASUREMENT OF MICRO AMPLITUDES OF WATER SURFACE WAVES

  • 摘要: 采用一种非接触光学方法------Fourier变换光栅法,对受外激励的连续变化的水表面波进行实验测量, 获得变形光栅图像,通过对变形光栅图像进行反演计算, 获得连续变化的水表面波振幅, 是定量测量变化快的非定常运动的微幅波的一种全场测量手段.

     

    Abstract: A contactless optical technique, Fourier transform gridmethod with integration of a digital image processing technique isapplied to measure vibration amplitudes of the water surface wavegenerated in a vertical oscillating apparatus. It can obtain the waveheight information corresponding to each pixel point with a highprecision. The method offers a means for measuring the micro vibrationamplitudes of water surface waves.

     

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