单目多光谱氧气吸收被动测距系统光谱通道参数分析

发布时间：2018-05-08 17:17

  本文选题：大气光学 + 被动测距　； 参考：《光学学报》2017年10期

【摘要】：为消除测距光谱通道位置和数量选取对氧气吸收衰减被动测距技术测距精度的影响,基于氧气吸收衰减被动测距技术的基本原理,分析氧气A、B吸收带光谱谱线特性。对于吸收带带肩上的光谱通道,利用蒙特卡罗法,以拟合非吸收基线与理想基线的误差平方和与相关度为指标,分析光谱通道位置和数量及拟合多项式级次对非吸收基线拟合精度的影响。对于吸收带带内光谱通道,分析不同光谱通道处吸收率大小对测距距离和测距精度的影响。结果表明:在综合考虑系统实时性和测距精度要求的情况下,A吸收带两带肩上光谱通道各为1个,B吸收带单带肩上光谱通道为2个,位置均宜选择在各带肩靠近吸收带一端;吸收带内光谱通道可根据测距任务中对测程和测距精度的要求灵活选择其数量和位置。因此,在无法一次性获取测距波段完整光谱曲线的情况下,单目多光谱被动测距系统采用较少的光谱通道和最简单的直线拟合方法,不仅可以保证系统的测距精度,而且能够减少滤波片更替和软件计算的时间周期,进而增强系统数据采集和解算的实时性。
[Abstract]:In order to eliminate the influence of location and quantity of range spectrum channel on the accuracy of oxygen absorption attenuation passive ranging, based on the basic principle of oxygen absorption attenuation passive ranging, the spectral line characteristics of oxygen absorption band are analyzed. For the spectral channel on the shoulder of the absorption band, the Monte Carlo method is used to fit the sum of square error and the correlation between the non-absorption baseline and the ideal baseline. The influence of the position and number of spectral channels and the degree of fitting polynomial on the fitting accuracy of non-absorption baselines is analyzed. For the absorption band spectrum channel, the influence of absorptivity at different spectral channels on ranging distance and ranging accuracy is analyzed. The results show that under the condition of considering the requirement of system real-time and ranging precision, the two shoulder-shoulder spectrum channels of A A absorption band are one B absorption band and the single shoulder spectrum channel with single band is 2, and the position should be chosen at each shoulder near one end of the absorption band. The number and position of absorption band spectrum channel can be chosen flexibly according to the requirement of range and ranging accuracy in ranging task. Therefore, under the condition that the complete spectral curve of ranging band can not be obtained in one time, the passive ranging system of monocular multi-spectrum uses fewer spectral channels and the simplest straight line fitting method, which can not only ensure the ranging accuracy of the system. Moreover, it can reduce the time cycle of filter chip replacement and software calculation, and then enhance the real-time performance of system data acquisition and computation.
【作者单位】： 装甲兵工程学院控制工程系;中国人民解放军66011部队;中国人民解放军66061部队;
【基金】：院校创新基金(2016CJ10)
【分类号】：TP391.41
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本文编号：1862296