基于辐射计的目标红外辐射的研究

发布时间：2018-06-02 19:39

本文选题：红外辐射 + 光谱辐射计　；参考：《沈阳航空航天大学》2017年硕士论文

【摘要】：红外辐射是一种电磁场辐射,凡是温度高于绝对零度的物体都在不断的辐射红外线,红外辐射充满整个空间。因此,对目标红外辐射特性的研究是现阶段研究的重点课题之一。本文在利用傅里叶光谱辐射计测量系统的基础上,对被测目标的辐射特性进行了研究。主要研究内容包括:大气透过率的计算。在物体发出辐射的过程当中,空气中悬浮颗粒的散射以及气体分子的吸收是能量在传输过程中发生衰减的主要原因。为了提高对目标红外辐射特性的测量精度,利用红外光谱辐射计MR170在不同温度下对面源黑体的辐射特性进行了测量。根据对大气透过率建立的计算模型,求得实验环境下的大气透过率值。然后根据计算得到的大气透过率值对测得的辐亮度值反演,提高辐射特性测量精确度。目标光谱发射率的计算。发射率是物体红外辐射测量的一项重要参量,对目标辐射特性的测量精确性有着直接的影响。本文在传统的能量法测发射率的基础上进行改进,利用红外光谱辐射计MR170测量目标的光谱辐射亮度并在同一温度相同波段下建立一标准黑体模型,对目标的发射率进行求解。并进行了误差修正和分析,提高了发射率的计算精度。对飞机蒙皮辐射特性进行测量和计算。在相同环境相同距离下利用面源黑体对辐射计进行标定,利用标定的辐射计对不同温度下的飞机蒙皮的辐射特性进行测量和计算。结合大气透过率的计算结果以及飞机表面蒙皮发射率的计算对目标的辐射特性进行了修正,提高辐射特性的计算精度。
[Abstract]:Infrared radiation is a kind of electromagnetic radiation. All objects with temperature above absolute zero are constantly radiating infrared radiation, and infrared radiation fills the whole space. Therefore, the study of infrared radiation characteristics of target is one of the key research topics at present. Based on the Fourier spectrum radiometer measurement system, the radiation characteristics of the target are studied in this paper. The main research contents include the calculation of atmospheric transmittance. The scattering of suspended particles in the air and the absorption of gas molecules are the main reasons for the decay of energy in the process of radiation. In order to improve the measurement accuracy of infrared radiation characteristics of targets, the infrared spectral radiometer (MR170) was used to measure the radiation characteristics of non-point blackbodies at different temperatures. Based on the calculation model of atmospheric transmittance, the atmospheric transmittance in experimental environment is obtained. Then the measured radiance values are inversed according to the calculated atmospheric transmittance values to improve the measurement accuracy of radiation characteristics. Calculation of target spectral emissivity. Emissivity is an important parameter in infrared radiation measurement of objects, which has a direct impact on the measurement accuracy of target radiation characteristics. Based on the traditional energy method for emissivity measurement, the infrared spectral radiometer (MR170) is used to measure the spectral radiance of the target, and a standard blackbody model is established at the same temperature band to solve the emissivity of the target. Error correction and analysis are carried out to improve the accuracy of emissivity calculation. The radiation characteristics of aircraft skin were measured and calculated. The radiometer is calibrated by using a blackbody in the same environment and at the same distance, and the radiation characteristics of the aircraft skin at different temperatures are measured and calculated by the calibrated radiometer. Combined with the calculation of atmospheric transmittance and the calculation of the surface emissivity of the aircraft, the radiation characteristics of the target are modified to improve the accuracy of the calculation of the radiation characteristics.
【学位授予单位】：沈阳航空航天大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN21

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