本文關(guān)鍵詞：固體發(fā)動(dòng)機(jī)尾焰近紅外高光譜計(jì)算與仿真　出處：《光譜學(xué)與光譜分析》2017年09期 　論文類型：期刊論文

  更多相關(guān)文章： 固體發(fā)動(dòng)機(jī)尾焰 鉀共振雙線 大氣透過率 數(shù)值模擬

【摘要】：首先介紹固體發(fā)動(dòng)機(jī)尾焰中鉀原子的來源及其在尾焰中的輻射機(jī)理,并基于原子譜線理論對(duì)尾焰鉀共振雙線的光譜線型特征進(jìn)行分析。然后,采用理想模型及半經(jīng)驗(yàn)公式法對(duì)尾焰流場(chǎng)分布進(jìn)行數(shù)值模擬,通過尾焰的流場(chǎng)參數(shù)使用C-G近似法數(shù)值計(jì)算尾焰鉀共振雙線的輻射特性。最后,利用大氣輻射傳輸模型計(jì)算尾焰中鉀共振雙線輻射信號(hào)經(jīng)過大氣傳輸后到達(dá)探測(cè)系統(tǒng)的光譜特征。結(jié)果表明,該方法能有效地仿真計(jì)算尾焰近紅外鉀線高光譜精細(xì)結(jié)構(gòu)。仿真結(jié)果亦表明鉀共振雙線光譜信號(hào)能有效通過大氣傳輸,可作為尾焰探測(cè)識(shí)別的依據(jù)。
[Abstract]:The origin of potassium atom in the tail flame of solid motor and its radiation mechanism in the tail flame are introduced firstly. The spectral profile of the potassium resonance double line in the tail flame is analyzed based on the atomic line theory. An ideal model and semi-empirical formula method are used to simulate the flow field distribution of the tail flame. The radiation characteristics of the potassium resonance double lines of the tail flame are calculated by C-G approximation method through the flow field parameters of the tail flame. The atmospheric radiation transfer model is used to calculate the spectral characteristics of the potassium resonance two-line radiation signal in the tail flame after it is transmitted through the atmosphere to the detection system. This method can effectively simulate and calculate the hyperspectral fine structure of the tail flame near infrared potassium line. The simulation results also show that the potassium resonance two-line spectral signal can be effectively transmitted through the atmosphere and can be used as the basis for the detection and identification of the tail flame.
【作者單位】： 桂林電子科技大學(xué)電子工程與自動(dòng)化學(xué)院;廣西高校光電信息處理重點(diǎn)實(shí)驗(yàn)室(桂林電子科技大學(xué));中國科學(xué)院安徽光學(xué)精密機(jī)械研究所;
【基金】：國家自然科學(xué)基金項(xiàng)目(41201342) 廣西自然科學(xué)基金項(xiàng)目(2013GXNSFAA019328) 廣西自動(dòng)檢測(cè)技術(shù)與儀器重點(diǎn)實(shí)驗(yàn)室基金項(xiàng)目(YQ14101) 桂林電子科技大學(xué)創(chuàng)新團(tuán)隊(duì)項(xiàng)目資助
【分類號(hào)】：O433
【正文快照】： 引言由于固體發(fā)動(dòng)機(jī)推進(jìn)劑中普遍存在鉀鹽,因此在其尾焰輻射光譜中存在近紅外鉀共振雙線(766.5和769.9nm)輻射信號(hào)。鉀共振雙線處在氧氣的A吸收帶中,具有大氣吸收小、太陽背景干擾小等優(yōu)點(diǎn)[1]。近年來,國外科學(xué)家積極開展尾焰鉀共振雙線的探測(cè)研究,并研制相關(guān)探測(cè)設(shè)備[2-3]。

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