Device for obtaining wave characteristic parameters in water tank and obtaining method thereof

Abstract

The invention discloses a device for obtaining wave characteristic parameters in a water tank and an obtaining method thereof. The device comprises an experiment water tank, a laser light sheet transmitter, a camera and a computer. The lateral wall and the bottom wall of the experiment water tank adopt a transparent material. The laser light sheet transmitter is located below the bottom wall of the experiment water tank. A laser light sheet is transmitted to a water body in the experiment water tank in a vertical low-angle shooting mode. The camera is located outside the lateral wall of the experiment water tank, and the wave motion process of a laser light sheet irradiating cross section is taken in a fixed-point mode by side-view shooting. The computer is connected with the camera. The computer uses an image recognition algorithm to recognize contours of waves in each photograph of a video captured by the camera, and calculates wave characteristic parameters. The time and space continuous change process and distribution of a waveform can be obtained. The wave height, wavelength, velocity and period of the waves can be obtained. The whole process has no interference to movement ofthe water and waves. The automation degree is high. Acquisition of wave characteristic parameters is not estimated, and therefore data accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of hydrodynamic experiments, and in particular relates to an acquisition device and an acquisition method for characteristic parameters of waves in a water tank. Background technique [0002] The surface of water bodies such as oceans and lakes in nature is usually not calm, but there are undulating waves. In the process of developing and utilizing oceans and lakes, the characteristic parameters of waves (wave height, wave period, wavelength, wave speed) must be determined. To carry out special research, for example, when designing docks, water platforms, wave power generation devices, etc., the influence of waves on them must be considered. It can be said that wave characteristic parameters are an important content in wave dynamics research. [0003] Wave characteristics are very complex, and it is very difficult to simulate and study them. At present, indoor tank simulation experiment is an effective metho...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to aim at the drawbacks of the above-mentioned existing wave characteristic parameter acquisition methods, apply image recognition technology to hydrodynamic experiment research, and provide a wave characteristic parameter acquisition device and its acquisition method in the water tank. The characteristic parameter acquisition device and its acquisition method can acquire the time and space continuous change process and distribution of the wave shape; the wave height, wavelength, wave velocity and wave period can be obtained; the whole process has no interference with the movement of the water body and the wave, and the degree of automation is high. The acquisition of wave characteristic parameters has not been estimated, and the data accuracy is high

Images