Wave height measuring method based on monocular vision laser triangulation method

Abstract

The invention discloses a wave height measuring method based on a monocular vision laser triangulation method. The wave height measuring method comprises the steps of collecting a water surface photocontaining laser light when there is no waves, preprocessing the image to obtain an edge and a contour of the laser light, extracting straight line features of the laser light, locating the image point coordinates of the intersection of laser light and water surface, obtaining a wave height corresponding to the image point coordinates according to the principle of direct laser triangulation methodwhen there are waves on the water surface by regarding the water surface without waves as a reference plane, repeatedly measuring to obtain the data about a plurality of sets of image point coordinates and wave heights, obtaining a relationship curve of the image point coordinates and wave heights by a least squares curve fitting method, obtaining the image point coordinates of the intersection of the laser light and the water surface by image processing during the measurement, and directly obtaining the wave height at this time by the relationship curve of the calibrated image point coordinates and the wave heights. The wave height measuring method provided by the invention belongs to non-contact measurement, and has fast measurement speed, high measurement precision and high efficiencywithout being easily affected by environmental factors such as water temperature.

Description

technical field [0001] The invention belongs to the technical field of measurement and detection, in particular to a wave height measurement method based on monocular vision laser triangulation. Background technique [0002] Ships and coastal buildings are constantly impacted by waves in the ocean, and waves are the most common natural phenomenon of water body movement. In addition, waves are also one of the reasons for the sediment in the ocean to flow with the sea. In the natural environment, the waves are unpredictable, so the field test will consume a lot of manpower and material resources, resulting in high research costs. At present, the commonly used research method is to simulate the waves in the natural environment in the laboratory and obtain experimental data. Wave height is a very important parameter in the study of wave problems. The traditional wave height measurement method is mainly based on contact measurement, including the measuring rod (capacitance or r...

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a wave height measurement method based on monocular vision laser triangulation, which solves the problem that existing contact wave height detectors are easily affected by environmental factors such as water temperature, and has higher measurement accuracy and measurement efficiency.

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