| 近红外光谱仪中调制器的误差分析 |
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| 引用本文： | 王智宏,林君,王一丁,占细雄.近红外光谱仪中调制器的误差分析[J].仪器仪表学报,2004,25(4):516-519. |
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| 作者姓名： | 王智宏 林君 王一丁 占细雄 |
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| 作者单位： | 吉林大学电子科学与工程学院,长春,130026 |
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| 基金项目： | 中国地质大调查 ( 19992 0 190 116)基金项目 |
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| 摘 要： | 调制器的误差会引起调制波频率和形状的变化，从而影响近红外光谱仪器检测信号的强度。就此分析了调制器各种常见的源误差(如调制盘偏心误差、调制盘的轴心偏离狭缝中心的误差、直流电动机的轴向晃动误差、直流电动机的稳定性误差、调制盘齿形误差等)对调制波的影响，并从理论上阐述了调制波的变频和变形误差对检测信号的影响。
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| 关 键 词： | 调制器 调制盘 调制波 信号 频率 变频 偏离 直流电动机 误差分析 轴向 |
| 修稿时间： | 2002年7月1日 |
The Error Analysis on Modulator of NIR Spectrophotometer |
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| Wang Zhihong Lin Jun Wang Yiding Zhan Xixiong.The Error Analysis on Modulator of NIR Spectrophotometer[J].Chinese Journal of Scientific Instrument,2004,25(4):516-519. |
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| Authors: | Wang Zhihong Lin Jun Wang Yiding Zhan Xixiong |
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| Abstract: | When the modulator(or optical chopper)of the NIR spectrophotometer was error,the frequency and shape of modulating wave would be changed,and the measuring signal of the spectrophotometer must be smaller.The errors of the modulator mainly come from the modulator plate,which include its eccentricity,the departure of its axes form the slit center,and its dentate error,etc.and from the direct current electromotor,which include its axial shake and its instability.These errors had been analyzed,and their infections to the measuring signal had been discussed theoretically. |
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| Keywords: | NIR spectrophotometer Modulator Error analysis |
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