不同观测角度下无人机多光谱特性的实验研究

Experimental Study of Multispectral Characteristics of an Unmanned Aerial Vehicle at Different Observation Angles.

作者信息

Zheng Haijing, Bai Tingzhu, Wang Quanxi, Cao Fengmei, Shao Long, Sun Zhaotian

机构信息

School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.

System Division, Navy Equipment Research Institute, Beijing 100161, China.

出版信息

Sensors (Basel). 2018 Feb 1;18(2):428. doi: 10.3390/s18020428.

DOI:10.3390/s18020428

PMID:29389880

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5855085/

Abstract

This study investigates multispectral characteristics of an unmanned aerial vehicle (UAV) at different observation angles by experiment. The UAV and its engine are tested on the ground in the cruise state. Spectral radiation intensities at different observation angles are obtained in the infrared band of 0.9-15 μm by a spectral radiometer. Meanwhile, infrared images are captured separately by long-wavelength infrared (LWIR), mid-wavelength infrared (MWIR), and short-wavelength infrared (SWIR) cameras. Additionally, orientation maps of the radiation area and radiance are obtained. The results suggest that the spectral radiation intensity of the UAV is determined by its exhaust plume and that the main infrared emission bands occur at 2.7 μm and 4.3 μm. At observation angles in the range of 0°-90°, the radiation area of the UAV in MWIR band is greatest; however, at angles greater than 90°, the radiation area in the SWIR band is greatest. In addition, the radiance of the UAV at an angle of 0° is strongest. These conclusions can guide IR stealth technique development for UAVs.

摘要

本研究通过实验研究了无人机在不同观测角度下的多光谱特性。无人机及其发动机在地面巡航状态下进行测试。利用光谱辐射计在0.9 - 15μm红外波段获取不同观测角度下的光谱辐射强度。同时，分别通过长波红外（LWIR）、中波红外（MWIR）和短波红外（SWIR）相机拍摄红外图像。此外，还获得了辐射区域和辐射亮度的方位图。结果表明，无人机的光谱辐射强度由其排气羽流决定，主要红外发射波段出现在2.7μm和4.3μm处。在0° - 90°观测角度范围内，无人机在MWIR波段的辐射面积最大；然而，在大于90°的角度下，SWIR波段的辐射面积最大。此外，无人机在0°角度时的辐射亮度最强。这些结论可为无人机的红外隐身技术发展提供指导。