本文選題：紅外輻射 + 輻射計�。� 參考：《沈陽大學》2015年碩士論文

【摘要】：如今隨著國防軍事的快速發(fā)展,飛機紅外隱身性能的重要性變得性日益突出。為了提高飛機的隱身性,對飛機紅外輻射能量進行測量顯得尤為重要。飛機的主要輻射源分為三個部分:蒙皮、尾焰、發(fā)動機尾噴口,這三大輻射源通常溫度差異較大,所以其輻射特性也有所不同。在本文中將著重對飛機蒙皮的紅外輻射展開分析,本文主要內(nèi)容如下所述:(1)在紅外光譜輻射計的標定方面,首先介紹了標定過程中目標充滿視場和未充滿視場這兩種情況,分別給出相應(yīng)的數(shù)學標定模型。文章中詳細的描述了兩點線性標定、多點線性標定與多點非線性標定的異同。然后在實驗室環(huán)境下,根據(jù)兩點線性標定對目標充滿視場的紅外光譜輻射計進行標定,并得到相應(yīng)的擬合函數(shù)與擬合曲線圖。(2)在測量蒙皮紅外輻射能量方面,文章首先對紅外光譜輻射計做簡要介紹,并重點介紹了本文實驗所用的MR170型紅外光譜輻射計,然后闡述了點源與面源的輻照度計算方法。最后利用MR170型紅外光譜輻射計在實驗室條件下對蒙皮的輻射強度值進行測量,然后結(jié)合標定所得的函數(shù)得出蒙皮的輻射亮度值。為了判定測得實驗數(shù)據(jù)的準確性,文章中加入了對比驗證的環(huán)節(jié),即利用紅外熱像儀測量蒙皮的溫度值,再通過相關(guān)定律將溫度值轉(zhuǎn)化為能量值然后再與紅外光譜輻射計測得的能量值進行比較。(3)在求解飛機蒙皮發(fā)射率方面,首先闡述了求解物體發(fā)射率的各種理論方法,然后分別利用普朗克定律和發(fā)射率定義式對蒙皮在各個溫度下的發(fā)射率進行求解,并分析了兩種方法得出的蒙皮發(fā)射率之間的誤差,最終得出各個溫度下蒙皮所對應(yīng)的光譜發(fā)射率。文中所測蒙皮的輻射能量值與發(fā)射率值對研發(fā)隱形戰(zhàn)機提供了一系列重要的數(shù)據(jù)基礎(chǔ),為提高戰(zhàn)機的紅外隱身性有著重要的意義。
[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.
【學位授予單位】：沈陽大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：V223;V218;TN219

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本文編號：1910915