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Wave measurement based on light refraction

机译:基于光折射的波测量

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Some authors have developed a few methods of measuring wave slopes based on light refraction, including the measurement method via the distribution of light intensity or color under water. A new method based on light refraction is specified for the measurement of wave surface elevation in wave flume via imaging technology. A plane painted with black and white stripes is put on the flume floor as an indication plane, which can be arranged easily and cheaply. Compared with the previous methods, the present method is less sensitive to the noise and nonlinear effects of optical process, which can be taken as a digital method. The CCD camera is fixed above the flume with its optical axis arranged vertically to grab the images of stripes modulated by the wave surface. The modulated value can be calculated from the Hilbert transform, and then the wave surface elevation can be obtained. The algorithm and experimental procedure are specified in detail, and some experimental results are provided to show the validity of the present method.
机译:一些作者开发了几种基于光折射的波斜率测量方法,包括通过在水中的光强度或颜色分布进行测量的方法。提出了一种基于光折射的新方法,用于通过成像技术测量波浪槽中的波浪表面高程。将涂有黑白条纹的平面放置在水槽地板上作为指示平面,可以轻松,廉价地进行布置。与以前的方法相比,本方法对光学过程的噪声和非线性影响较不敏感,可以将其视为数字方法。 CCD摄像机固定在水槽上方,其光轴垂直排列以捕获由波面调制的条纹图像。可以从希尔伯特变换中计算出调制值,然后可以得到波面高程。详细说明了该算法和实验步骤,并提供了一些实验结果,证明了该方法的有效性。

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