海面舰船开尔文尾迹红外特征与探测的模拟

舰船在水面航行时，由于船体和水面的相互作用，在船后会形成一条清晰可见的V 形的尾迹，即Kelvin 尾迹。首先基于海浪谱模型，生成了粗糙海面的几何构型，并结合Kelvin 尾迹模型，完成海面Kelvin 尾迹的几何构型。然后，通过波面发射率计算、探测器视场模型建立及热像生成3 个步骤，完成海面Kelvin 尾迹的红外图像仿真。最后，根据尾迹与周围海水间的辐射温差，建立Kelvin 尾迹的探测模型。研究结果表明：探测天顶角越大，Kelvin 尾迹与周围海水间的发射率差异越明显，尾迹的红外图像特征越显著；同时，随着探测天顶角的增大，探测概率逐渐增大。

Abstract

A Kelvin wake is defined as the clear V-wake trailing a ship that forms from the interaction between the hull and the water surface as the ship sails. In this study, the wave spectrum model was used to create the geometric structure of the sea surface; combining sea surface model with the Kelvin wake model yielded the geometric structure of a Kelvin wake pattern on the sea surface. Next, the infrared image simulations of sea surface Kelvin wake patterns were completed by performing the following steps: ① calculation of the wave plane, ②establishment of a detector field model, and ③generation of a thermal image. Finally, the detection model of a Kelvin wake was established according to the radiant temperature difference between a Kelvin wake and the ambient sea water. The results showed that increased detected zenith angle yielded an increased emissivity difference between the Kelvin wake and ambient sea water. Consequently, the infrared image characterizations of Kelvin wake were more distinguishable, and the detection probability was found to gradually increase with increasing detection zenith angle.

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陈翾, 林春生, 杨立. 海面舰船开尔文尾迹红外特征与探测的模拟[J]. 红外技术, 2017, 39(8): 717. CHEN Xuan, LIN Chunsheng, YANG Li. Simulation of Infrared Characterizations and Detection of Kelvin Wake[J]. Infrared Technology, 2017, 39(8): 717.

海面舰船开尔文尾迹红外特征与探测的模拟

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