水下对太阳成像估算海况的新方法

A New Method for Estimating Sea State by Underwater Solar Imaging

水下对空光电成像探测技术即虚拟潜望镜技术为潜艇在安全深度下实现对海空目标的警戒探测提供了一种新的手段,对提高潜艇的隐蔽性具有重要作用。通过虚拟潜望镜技术获取的水下对空图像,可以解算出海况信息。在此基础上,提出了一种以太阳为观察目标,利用水下相机透过海水及波浪界面对其成像,从而解算海况的方法。在假定波浪为一维正弦波的情况下,仿真计算出在不同成像参数下的一维图像亮度分布,通过比对正弦波参数与图像亮度分布之间的关系,表明该方法可以发展成为一种有效的海况估算方法。

The water-to-air photoelectric imaging technology or virtual periscope provides a new means for submarine to alerting above sea surface or air targets at security depth which plays an important role in improving the concealment of submarines.Taking advantage of the virtual periscope technology,sea state can be obtained by calculating water-to-air images.Based on this,a method is proposed to use the sun as the target which is imaged through the sea water and the wave boundary by an underwater camera and solve the sea state.Assuming that sea wave has the form of one-dimensional sine curve,the brightness distribution of the one-dimensional image under different imaging parameters are simulated.By comparing parameters of the sine wave with the image brightness distributions,it is shown that this method can be developed into an effective sea state estimation method.