基于立体视觉和波浪理论的波面测量方法初探

Wave Surface Identification Based on Stereo Vision and Wave Theory:an Initial Attempt

波高是波浪信息最基本的元素,对波高的精确测量无论是对波浪理论的研究还是数值方法的拓展,都起着指导和验证的作用.文中基于双目立体视觉原理自主搭建了波面光学测量系统,突破了传统测量设备如浪高仪等单点测量的局限性,并将波浪理论融入到数据后处理方法中,对常用的单纯依赖图像的光学测量方法进行了改进.通过在拖曳水池中对单向规则波瞬时波面的识别和重构,并将结果与浪高仪以及理论来波参数进行了对比验证,结果表明该测量系统在大范围波面的测量中误差在1%左右,最后对其在非规则的来波下进行了初步尝试.

The wave height is the most basic element of wave information,and accurate measurement of wave heights plays a crucial role in both understanding wave theory and verifying numerical models.An improved optical measurement system was proposed based on the principle of binocular stereo vision,which breaks through the limitations of traditional measurement devices such as wave gauges and other single-point measurements,and improves the commonly used optical measurement method relying solely on images by involving the water wave theory into the data post-processing procedure.Through the identification and reconstruction of the unidirectional regular wave surface in a towing tank and the comparison of the results with the wave gauges and theoretical incoming wave parameters for validation,the research shows that,the measuring system has an error of about 1%in the measurement of a wide-area wave surface.Finally,a preliminary attempt was made on the irregular wave surface identification.