论文部分内容阅读
根据目标红外辐射在大气中传输衰减的特性探测传感器与目标的距离,隐身无源,难于被敌方探测,发展了一种基于大气氧组分光谱吸收特性的单目单波段被动测距方法.引入视线路径的概念,将氧物性分布场离散化,寻找辐射积分路径;利用离散传递法基本思想,得到目标窄带辐射强度分布.基于氧分子吸收发射谱独立、吸收系数恰当,饱和可测范围大等特性,分析氧吸收波段内谐振频带和远谐振频带辐射强度谱线分布的相对关系,得到其与积分路径(即距离)的关联.采用分辨率为0.75nm半高宽的窄带高分辨率光谱仪,实地校准氧物性分布场,实现了测距实验范围75—200m,模型测算相对误差最大为7.56%的样机.
According to the characteristic that the target infrared radiation attenuates in the atmosphere, the distance between the sensor and the target is detected, stealth passive, and difficult to be detected by the enemy. A single-band single-band passive range measurement method based on spectral absorption characteristics of atmospheric oxygen component has been developed. The concept of line-of-sight path is introduced to discretize the oxygen distribution field and find the path of radiation integration. The distribution of target narrow-band radiation intensity is obtained by using the basic idea of discrete transmission method. Based on the independent absorption and emission spectra of oxygen molecules, And other characteristics, the relative relationship between the resonance frequency band in the absorption band of the oxygen absorption band and the spectral distribution of the radiation band in the far resonance band is analyzed, and its correlation with the integration path (ie distance) is obtained. Using a narrowband high resolution spectrometer with a resolution of 0.75nm , Field calibration of oxygen distribution field, to achieve a distance ranging from 75-200m experimental model, the maximum relative error of 7.56% of the prototype.