本文關(guān)鍵詞：自校準光譜輻射計信號采集及系統(tǒng)控制設(shè)計　出處：《中國科學技術(shù)大學》2017年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 自發(fā)參量下轉(zhuǎn)換 自校準 符合測量 高速數(shù)據(jù)采集 LabVIEW

【摘要】：針對傳統(tǒng)輻射定標精度已不能滿足定量應用和氣候變化研究的迫切需求,課題組計劃研制一種基于自發(fā)參量下轉(zhuǎn)換,具有自校準和輻射觀測兩種工作模式的光譜輻射計。本文主要解決該輻射計自動化定標及采集軟件精度驗證方面的問題。根據(jù)測量需求設(shè)計了自校準輻射計數(shù)據(jù)采集系統(tǒng)控制方案,基于LabVIEW語言編寫了自校準輻射計數(shù)據(jù)采集系統(tǒng)控制軟件。自校準模式能夠自動定標多個通道探測效率,觀測模式能夠同時獲得多個通道μs間隔的光子計數(shù)。自校準模式時,利用355nm激光泵浦BBO晶體,使用編寫的自校準模式軟件定標了APD在736nm波長點的量子效率為67.3%,測量的不確定度優(yōu)于0.71%,和APD出廠數(shù)據(jù)的相對偏差為1%;觀測模式時,使用編寫的軟件采集0.1s時間內(nèi)APD輸出計數(shù)值,并和994計數(shù)器輸出值比較,平均相對偏差為0.22%,可以證明編寫的控制軟件能夠滿足系統(tǒng)的功能要求。設(shè)計了輻射計自校準原理有效性驗證實驗方案,基于LabVIEW語言編寫了對應的控制軟件。通過向光路中插入不同倍率的衰減片來模擬系統(tǒng)的衰變,選擇積分球出射的單色均勻光作為觀測光源,利用編寫的控制軟件測量不同衰減對應的入瞳相對光譜輻亮度,相對偏差為2.39%,證明設(shè)計的自校準輻射計反演的光譜輻亮度不隨系統(tǒng)的衰變而發(fā)生變化,系統(tǒng)具有自校準功能。研制的自校準光譜輻射計的最終目標是作為可見～近紅外波段空間光學遙感器的輻射基準,對其它光學遙感器進行定標。因此論文最后分析了當前數(shù)據(jù)采集系統(tǒng)的精度限制和體積限制,提出了一種基于時間數(shù)字轉(zhuǎn)換(TDC)的高精度和小型化的數(shù)據(jù)采集系統(tǒng)設(shè)計方案。
[Abstract]:In view of the traditional radiometric calibration accuracy can no longer meet the urgent needs of quantitative applications and climate change research, the team plans to develop a kind of down-conversion based on spontaneous parameters. Spectral radiometer with two working modes of self calibration and radiation observation. This paper mainly solves the problems of automatic calibration of radiometer and precision verification of acquisition software. According to the requirement of measurement, the data of self calibration radiometer is designed. Control scheme of acquisition system. The control software of data acquisition system of self-calibrating radiometer is programmed based on LabVIEW language. The self-calibration mode can automatically calibrate the detection efficiency of multiple channels. In the self-calibrating mode, the BBO crystal is pumped by 355nm laser at the same time. The self-calibration mode software is used to calibrate the quantum efficiency of APD at 736nm wavelength, and the uncertainty of measurement is better than 0.71%. And the relative deviation of APD data is 1. In the observation mode, the APD output count value is collected in 0.1 s by using the software, and the average relative deviation is 0.22% compared with the output value of the 994 counter. It can be proved that the control software can meet the functional requirements of the system. An experimental scheme to verify the validity of the radiometer self-calibration principle is designed. The corresponding control software is compiled based on LabVIEW language. The decay of the system is simulated by inserting attenuation slices of different rates into the optical path, and the monochromatic uniform light emitted from the integral sphere is selected as the observation light source. The relative spectral radiance of different attenuation was measured with the control software, and the relative deviation was 2.39%. It is proved that the spectral radiance of the self-calibrated radiometer does not change with the decay of the system. The system has the function of self-calibration. The ultimate goal of the self-calibrated spectrometer is to be the radiation reference of the space optical remote sensor in the visible ~ near infrared band. Other optical remote sensors are calibrated. Finally, the accuracy and volume limitations of the current data acquisition system are analyzed. A design scheme of high precision and miniaturization data acquisition system based on time digital converter (TDC) is presented.
【學位授予單位】：中國科學技術(shù)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH74;TP274;TP311.52

【參考文獻】

相關(guān)期刊論文 前10條

1 盛文陽;李健軍;夏茂鵬;龐偉偉;高冬陽;鄭小兵;;基于參量下轉(zhuǎn)換的3.39μm中紅外輻射源定標實驗[J];紅外與激光工程;2016年10期

2 張森;陶旭;馮志軍;吳淦華;薛莉;閆夏超;張蠟寶;賈小氫;王治中;孫俊;董光焰;康琳;吳培亨;;超導單光子探測器暗計數(shù)對激光測距距離的影響[J];物理學報;2016年18期

3 董瑤海;;風云四號氣象衛(wèi)星及其應用展望[J];上海航天;2016年02期

4 胡友勃;李健軍;夏茂鵬;高冬陽;鄭小兵;;光子計數(shù)器的線性測量和修正[J];光子學報;2016年06期

5 王玉鵬;胡秀清;王紅睿;葉新;方偉;;可在軌溯源的太陽反射波段光學遙感儀器輻射定標基準傳遞鏈路[J];光學精密工程;2015年07期

6 陳海東;史學舜;趙坤;劉長明;;基于LabVIEW的單光子探測器量子效率測控軟件設(shè)計[J];宇航計測技術(shù);2015年03期

7 王敏;何明元;張水平;陳曉穎;邱敏;;通道式可見光近紅外衛(wèi)星遙感器輻射定標方法綜述[J];遙感信息;2014年01期

8 呂亮;張寅超;林延東;;糾纏光子法絕對定標光電探測器量子效率的研究[J];光學學報;2012年01期

9 任建偉;麥鎮(zhèn)強;萬志;李憲圣;李鳳有;;星上LED定標光源的可行性研究[J];光學精密工程;2008年03期

10 張祥雪;張立;;單光子計數(shù)器的校驗方法研究[J];光學技術(shù);2007年04期

相關(guān)博士學位論文 前2條

1 趙維寧;高精度可溯源SI在軌絕對光譜輻亮度定標傳遞鏈路研究[D];中國科學院研究生院(長春光學精密機械與物理研究所);2016年

2 白云飛;自發(fā)參量下轉(zhuǎn)換制備單光子源及其測量與應用研究[D];山西大學;2011年

相關(guān)碩士學位論文 前3條

1 王力;基于LabVIEW的高速數(shù)據(jù)采集系統(tǒng)的軟硬件設(shè)計[D];南京理工大學;2013年

2 裴任;基于FPGA的高精度符合計數(shù)器設(shè)計[D];南京郵電大學;2013年

3 盧萍;新型全光纖OCT實驗系統(tǒng)的控制及數(shù)據(jù)采集[D];天津大學;2007年

，

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