基于蒙皮的红外辐射能量测量方法研究

发布时间：2018-05-19 16:58

本文选题：红外辐射 + 辐射计　；参考：《沈阳大学》2015年硕士论文

【摘要】：如今随着国防军事的快速发展,飞机红外隐身性能的重要性变得性日益突出。为了提高飞机的隐身性,对飞机红外辐射能量进行测量显得尤为重要。飞机的主要辐射源分为三个部分:蒙皮、尾焰、发动机尾喷口,这三大辐射源通常温度差异较大,所以其辐射特性也有所不同。在本文中将着重对飞机蒙皮的红外辐射展开分析,本文主要内容如下所述:(1)在红外光谱辐射计的标定方面,首先介绍了标定过程中目标充满视场和未充满视场这两种情况,分别给出相应的数学标定模型。文章中详细的描述了两点线性标定、多点线性标定与多点非线性标定的异同。然后在实验室环境下,根据两点线性标定对目标充满视场的红外光谱辐射计进行标定,并得到相应的拟合函数与拟合曲线图。(2)在测量蒙皮红外辐射能量方面,文章首先对红外光谱辐射计做简要介绍,并重点介绍了本文实验所用的MR170型红外光谱辐射计,然后阐述了点源与面源的辐照度计算方法。最后利用MR170型红外光谱辐射计在实验室条件下对蒙皮的辐射强度值进行测量,然后结合标定所得的函数得出蒙皮的辐射亮度值。为了判定测得实验数据的准确性,文章中加入了对比验证的环节,即利用红外热像仪测量蒙皮的温度值,再通过相关定律将温度值转化为能量值然后再与红外光谱辐射计测得的能量值进行比较。(3)在求解飞机蒙皮发射率方面,首先阐述了求解物体发射率的各种理论方法,然后分别利用普朗克定律和发射率定义式对蒙皮在各个温度下的发射率进行求解,并分析了两种方法得出的蒙皮发射率之间的误差,最终得出各个温度下蒙皮所对应的光谱发射率。文中所测蒙皮的辐射能量值与发射率值对研发隐形战机提供了一系列重要的数据基础,为提高战机的红外隐身性有着重要的意义。
[Abstract]:Nowadays, with the rapid development of national defense and military, the importance of infrared stealth performance of aircraft becomes more and more prominent. In order to improve the stealth of aircraft, it is very important to measure the infrared radiation energy of aircraft. The main radiation sources of aircraft are divided into three parts: skin, tail flame, engine tail nozzle, these three radiation sources are usually different in temperature, so their radiation characteristics are also different. In this paper, the infrared radiation of aircraft skin will be analyzed emphatically. The main contents of this paper are as follows: 1) in the calibration of infrared spectrometer, we first introduce the two cases of target filling field of view and not filling field of view in the process of calibration. The corresponding mathematical calibration models are given respectively. In this paper, the similarities and differences of two linear calibration, multipoint linear calibration and multipoint nonlinear calibration are described in detail. Then in the laboratory environment, the infrared spectrometer full of field of view is calibrated according to two-point linear calibration, and the corresponding fitting function and curve are obtained, which can be used to measure the infrared radiation energy of the skin. In this paper, the infrared spectrometer is introduced briefly, and the MR170 type infrared spectrometer used in the experiment is introduced in detail. Then the irradiance calculation method of point source and point source is described. Finally, the radiation intensity of the skin was measured by MR170 infrared spectrometer under laboratory conditions, and then the luminance value of the skin was obtained by combining the function of calibration. In order to determine the accuracy of the experimental data, a comparative verification link is added to the paper, that is, the temperature of the skin is measured by the infrared thermal imager. Then the temperature value is transformed into the energy value through the correlation law, and then compared with the energy value measured by infrared spectrum radiometer. In the aspect of calculating the emissivity of aircraft skin, the various theoretical methods to solve the emissivity of the object are first expounded. Then using Planck's law and emissivity definition formula, the emissivity of the skin at each temperature is solved, and the error between the emissivity of the two methods is analyzed. Finally, the spectral emissivity of the skin is obtained at various temperatures. The values of radiation energy and emissivity of the skin measured in this paper provide a series of important data basis for the development of stealth fighter, and it is of great significance to improve the infrared stealth of the fighter.
【学位授予单位】：沈阳大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V223;V218;TN219

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