發(fā)布時(shí)間：2018-02-12 04:46

  本文關(guān)鍵詞： 激光誘導(dǎo)熒光 熒光光譜 氣溶膠 激光雷達(dá)　出處：《中國(guó)科學(xué)技術(shù)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,全球范圍內(nèi)的傳染病、霧霾污染、大氣環(huán)境污染、生物恐怖襲擊等嚴(yán)重威脅著人類的正常生活,這些污染都與生物氣溶膠息息相關(guān)。因此,快速、準(zhǔn)確的實(shí)現(xiàn)對(duì)有害生物氣溶膠的實(shí)時(shí)監(jiān)測(cè)具有重要意義。本文基于激光誘導(dǎo)熒光的原理,設(shè)計(jì)并搭建了一套探測(cè)生物氣溶膠的裝置,展開對(duì)于生物質(zhì)本征熒光物質(zhì)核黃素與還原型輔酶I(NADH)的研究,研究了包括溫度、濃度、激光能量等在內(nèi)的各種因素對(duì)熒光光譜造成的影響,并最終給出了一套激光誘導(dǎo)熒光激光雷達(dá)的遙測(cè)方案,為進(jìn)一步實(shí)現(xiàn)利用激光誘導(dǎo)熒光技術(shù)探測(cè)氣溶膠提供理論基礎(chǔ)。本文主要工作內(nèi)容和研究如下:1.搭建一套利用激光誘導(dǎo)熒光原理探測(cè)生物氣溶膠的裝置,并利用核黃素、還原型輔酶I(NADH)、羅丹明B三種典型的熒光物質(zhì)實(shí)現(xiàn)對(duì)系統(tǒng)性能的檢測(cè),成功獲得核黃素、NADH、羅丹明B的熒光光譜圖。2.利用該裝置,研究影響核黃素和NADH熒光光譜強(qiáng)度的各種因素。這些因素包括濃度、激光能量、溶劑類型、PH值、溫度等,初步得到這些因素與熒光光譜強(qiáng)度之間的關(guān)系,同時(shí)得到系統(tǒng)的檢測(cè)極限。最后,得到以核黃素為溶質(zhì)制備的氣溶膠的熒光光譜圖,并研究了氣溶膠粒子粒徑與熒光強(qiáng)度的關(guān)系。3.給出激光誘導(dǎo)熒光激光雷達(dá)的總體設(shè)計(jì)方案,包括激光器、望遠(yuǎn)鏡、光電探測(cè)器、分光元件等主要元件的選型。對(duì)系統(tǒng)進(jìn)行模擬分析,討論激光單脈沖強(qiáng)度、望遠(yuǎn)鏡接收視場(chǎng)角等對(duì)信噪比的影響,模擬出最遠(yuǎn)探測(cè)距離和最低探測(cè)濃度。最后分析了噪聲的來源與降噪的措施。
[Abstract]:In recent years, infectious diseases, haze pollution, atmospheric pollution, bioterrorist attacks and other serious threats to human life, these pollution is closely related to biological aerosols. Accurate realization of real-time monitoring of harmful aerosols is of great significance. Based on the principle of laser-induced fluorescence, a device for detecting biological aerosols is designed and built. The study of riboflavin and reduced coenzyme Ignadh, the intrinsic fluorescent substance of biomass, was carried out, and the effects of various factors, including temperature, concentration and laser energy, on the fluorescence spectrum were studied. Finally, a set of telemetry scheme for lidar is given. In order to provide a theoretical basis for further using laser induced fluorescence technology to detect aerosols, the main work and research in this paper are as follows: 1.A set of devices using laser induced fluorescence principle to detect biological aerosols are built, and riboflavin is used. The fluorescence spectra of riboflavin NADH and rhodamine B were successfully obtained by using three typical fluorescent substances such as reductive coenzyme Igna NADHN, Rhodamine B, and Rhodamine B, respectively. Various factors affecting the fluorescence intensity of riboflavin and NADH were studied. These factors include concentration, laser energy, solvent type PH value, temperature and so on. The relationship between these factors and fluorescence spectral intensity was preliminarily obtained. Finally, the fluorescence spectra of aerosol prepared with riboflavin as solute were obtained, and the relationship between aerosol particle size and fluorescence intensity was studied. 3. The overall design of laser-induced fluorescent lidar was presented. Including the selection of laser, telescope, photodetector, splitter and other main components. The system is simulated and analyzed, and the influence of laser monopulse intensity and the angle of view received by telescope on SNR is discussed. The furthest detection range and the lowest detection concentration are simulated. Finally, the source of noise and the measures to reduce noise are analyzed.
【學(xué)位授予單位】：中國(guó)科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O657.3;O648.16

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 李金有;王林;李西標(biāo);陳春田;慈穎;郭文靜;;生物氣溶膠采集與檢測(cè)研究進(jìn)展[J];檢驗(yàn)檢疫學(xué)刊;2013年06期

2 葛琳琳;丁蕾;閆靜;王穎萍;鄭海洋;方黎;;核黃素與NADH在紫光波段的激光誘導(dǎo)熒光光譜研究[J];原子與分子物理學(xué)報(bào);2013年01期

3 馮巍巍;王銳;孫培艷;高振會(huì);陳令新;;幾種典型石油類污染物紫外激光誘導(dǎo)熒光光譜特性研究[J];光譜學(xué)與光譜分析;2011年05期

4 梁錫輝;區(qū)偉能;任豪;付治新;;激光誘導(dǎo)熒光檢測(cè)技術(shù)[J];激光與光電子學(xué)進(jìn)展;2008年01期

5 朱元,鄭海洋,顧學(xué)軍,周留柱,郭曉勇,趙文武,方黎,張為俊;大氣氣溶膠的檢測(cè)方法研究[J];環(huán)境科學(xué)與技術(shù);2005年S1期

6 楊丙成,關(guān)亞風(fēng),黃威東,車訊;一種便攜式激光誘導(dǎo)熒光檢測(cè)器的研制[J];分析試驗(yàn)室;2001年06期

7 顧月清，陶寶祺，，錢志余;激光誘導(dǎo)熒光及其應(yīng)用[J];激光與光電子學(xué)進(jìn)展;1996年07期

相關(guān)博士學(xué)位論文 前1條

1 楊子健;基于激光雷達(dá)技術(shù)的生物氣溶膠監(jiān)測(cè)系統(tǒng)構(gòu)建與關(guān)鍵技術(shù)研究[D];中國(guó)人民解放軍軍事醫(yī)學(xué)科學(xué)院;2015年

本文編號(hào)：1504809