近紅外光源穩(wěn)定控制系統(tǒng)及應用研究
發(fā)布時間:2018-02-24 23:17
本文關鍵詞: 近紅外光源 穩(wěn)定控制 穩(wěn)流源 光譜儀 積分球輻射定標光源 出處:《吉林大學》2015年碩士論文 論文類型:學位論文
【摘要】:本文針對近紅外光譜儀以及輻射定標光源的應用需求,設計了近紅外光源穩(wěn)定控制系統(tǒng),根據(jù)不同的應用,使用不同的控制方式,最終實現(xiàn)光源輸出光強穩(wěn)定均勻。 由于電流比電壓對光功率的影響較大,故使用穩(wěn)流源作為光源的驅(qū)動電源,穩(wěn)定控制系統(tǒng)控制穩(wěn)流源為20W或50W的鹵鎢燈提供穩(wěn)定的電流,電流范圍是0A~5.0000A,電流的不穩(wěn)定度小于0.06%。 等效型近紅外光譜儀針對不同的樣品,利用等效測量的方法通過光源系統(tǒng)的亮度可調(diào)穩(wěn)流單元調(diào)節(jié)控制光譜儀的20W鹵鎢燈的電流大。0~1.6667A),使光源穩(wěn)定輸出不同的光強度,通過實驗測量出不同的等效光譜數(shù)據(jù),光信號不穩(wěn)定度小于0.1%。 為了實驗室光譜測量儀器輻射定標中提供穩(wěn)定均勻的輻亮度光源,研制了一整套積分球輻射定標光源。其結構組成包括近紅外光源穩(wěn)定控制系統(tǒng)、等色溫連續(xù)調(diào)光裝置和積分球。其中,穩(wěn)定控制系統(tǒng)包括STM32微處理器、電信號采集單元、穩(wěn)流控制單元、光電探測單元、電信號的設定與顯示單元等。穩(wěn)定控制系統(tǒng)利用等色溫調(diào)光裝置,通過步進電機帶動光欄轉盤控制進入積分球入光口的光通量,保持積分球出光口能夠等色溫連續(xù)調(diào)節(jié)輸出穩(wěn)定的光譜輻亮度。經(jīng)測試實驗得,輻射定標光源輸出的輻亮度范圍是0~2000cd/m2,非均勻性是0.5%,不穩(wěn)定性是0.35%,完全可滿足設計需求。
[Abstract]:In order to meet the requirements of near infrared spectrometer and radiation calibration light source, a stability control system of near infrared light source is designed in this paper. According to different applications and different control methods, the light source output intensity is stable and uniform. Because the current ratio voltage has a great influence on the optical power, the stable current source is used as the driving power source of the light source. The stable control system controls the stable current source of 20W or 50W halogen tungsten lamp to provide the stable current. The current range is 0 A / V 5.0000A, and the instability of the current is less than 0.06. The equivalent near infrared spectrometer is used to control the current of the 20W halogen tungsten lamp of the spectrometer by using the method of equivalent measurement through the brightness adjustable and steady current unit of the light source system, so that the light source can output different light intensity stably. Different equivalent spectral data are measured experimentally. The optical signal instability is less than 0.1. In order to provide a stable and uniform radiance light source in the radiometric calibration of laboratory spectrometer, a whole set of integrated sphere radiation calibration light sources has been developed. Its structure consists of a stability control system of near infrared light source. Constant color temperature continuous dimming device and integral sphere. The stability control system includes a STM32 microprocessor, an electrical signal acquisition unit, a steady current control unit, and a photoelectric detection unit. The stable control system uses the same color temperature dimming device to control the flux of light entering the integrated sphere through the step motor driving the optical bar turntable. The measurement results show that the radiation calibration source output radiance range is 0 ~ 2000cd/ m ~ 2, the nonuniformity is 0.5cm / m ~ 2, and the instability is 0.35. it can completely meet the design requirements.
【學位授予單位】:吉林大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TP273;TN219
【參考文獻】
相關期刊論文 前8條
1 周勝利;積分球在實驗室內(nèi)用于空間遙感器的輻射定標[J];航天返回與遙感;1998年01期
2 邢進;王淑榮;李福田;;空間紫外遙感光譜輻射計光譜輻亮度定標三種方法的比較[J];中國激光;2006年04期
3 楊小虎;王淑榮;曲藝;黃煜;林冠宇;;基于絕對輻亮度計定標的積分球紫外光譜輻射特性研究[J];中國激光;2011年10期
4 李秀紅;陳濤;喬長城;黃小龍;蘇振;王艷斌;;路面狀況傳感器穩(wěn)定光源驅(qū)動電路設計[J];氣象與環(huán)境科學;2013年01期
5 徐駿;孟炳寰;鄭小兵;翟文超;李健軍;;紅外標準輻亮度計的研制及定標[J];紅外與激光工程;2013年04期
6 劉洪興;任建偉;李憲圣;萬志;劉則洵;李葆勇;孫景旭;;基于LightTools的大口徑積分球輻射特性仿真[J];紅外與激光工程;2013年04期
7 李振國;光電成象式亮度計的特性及其誤差表示方法[J];計量技術;1996年06期
8 蔣融;一種新穎的穩(wěn)定光強的實用方法[J];實用測試技術;1994年04期
,本文編號:1532115
本文鏈接:http://sikaile.net/kejilunwen/dianzigongchenglunwen/1532115.html
教材專著